LU505217B1 - Vegetation Restoration Method for Hydropower Development Area in Dry-hot Valley of Plateau - Google Patents
Vegetation Restoration Method for Hydropower Development Area in Dry-hot Valley of Plateau Download PDFInfo
- Publication number
- LU505217B1 LU505217B1 LU505217A LU505217A LU505217B1 LU 505217 B1 LU505217 B1 LU 505217B1 LU 505217 A LU505217 A LU 505217A LU 505217 A LU505217 A LU 505217A LU 505217 B1 LU505217 B1 LU 505217B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- planting
- soil
- carried out
- covering
- thickness
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000011161 development Methods 0.000 title claims abstract description 12
- 235000013399 edible fruits Nutrition 0.000 claims abstract description 31
- 244000075850 Avena orientalis Species 0.000 claims abstract description 30
- 235000007319 Avena orientalis Nutrition 0.000 claims abstract description 30
- 240000004658 Medicago sativa Species 0.000 claims abstract description 29
- 235000010624 Medicago sativa Nutrition 0.000 claims abstract description 29
- 240000007049 Juglans regia Species 0.000 claims abstract description 25
- 235000009496 Juglans regia Nutrition 0.000 claims abstract description 25
- 241000196324 Embryophyta Species 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 9
- 239000002689 soil Substances 0.000 claims description 163
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 32
- 210000003608 fece Anatomy 0.000 claims description 29
- 239000010871 livestock manure Substances 0.000 claims description 29
- 238000003973 irrigation Methods 0.000 claims description 21
- 230000002262 irrigation Effects 0.000 claims description 21
- 238000009331 sowing Methods 0.000 claims description 18
- 241000283690 Bos taurus Species 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 12
- 230000018109 developmental process Effects 0.000 claims description 10
- 244000025254 Cannabis sativa Species 0.000 claims description 9
- 241001494479 Pecora Species 0.000 claims description 9
- 230000006872 improvement Effects 0.000 claims description 8
- 230000008020 evaporation Effects 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 7
- 230000035784 germination Effects 0.000 claims description 7
- 241001465754 Metazoa Species 0.000 claims description 6
- 230000004720 fertilization Effects 0.000 claims description 6
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 claims description 6
- 239000003337 fertilizer Substances 0.000 claims description 5
- 230000008014 freezing Effects 0.000 claims description 4
- 238000007710 freezing Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000004083 survival effect Effects 0.000 abstract description 14
- 240000008415 Lactuca sativa Species 0.000 abstract description 6
- 239000002028 Biomass Substances 0.000 description 28
- 230000009286 beneficial effect Effects 0.000 description 13
- 235000015097 nutrients Nutrition 0.000 description 11
- 238000011282 treatment Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 8
- 241000511977 Elymus sibiricus Species 0.000 description 6
- 241000621071 Elymus dahuricus Species 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 230000008635 plant growth Effects 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 235000013339 cereals Nutrition 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 241000894007 species Species 0.000 description 4
- 230000012010 growth Effects 0.000 description 3
- 239000003895 organic fertilizer Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241000220485 Fabaceae Species 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004162 soil erosion Methods 0.000 description 2
- 206010020880 Hypertrophy Diseases 0.000 description 1
- 241000209504 Poaceae Species 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- RDXARWSSOJYNLI-UHFFFAOYSA-N [P].[K] Chemical compound [P].[K] RDXARWSSOJYNLI-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000011284 combination treatment Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000008216 herbs Nutrition 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000007226 seed germination Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000004016 soil organic matter Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G17/00—Cultivation of hops, vines, fruit trees, or like trees
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Botany (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Cultivation Of Plants (AREA)
Abstract
The present invention discloses a vegetation restoration method for hydropower development area in dry-hot valley of plateau. Based on gravelly ecological conditions in dry-hot valley of southeast Tibet with arid climate, artificial grassland planting and economic fruit forest planting are proposed for vegetation restoration. A combination of Medicago sativa L. and Avena sativa L. is selected for the artificial grassland planting of the present invention, and survival rates of the two plants are high, and current coverage rates are over 90%; Juglans regia L. is selected for the economic fruit forest planting, and the survival rate is above 90%; and a whole pilot area is basically covered with vegetation, and the control effect is good, thus accelerating the vegetation restorations of hydropower station residue fields in ecologically fragile areas.
Description
VEGETATION RESTORATION METHOD FOR HYDROPOWER DEVELOPMENT LU505217
AREA IN DRY-HOT VALLEY OF PLATEAU
The present invention belongs to the technical field of vegetation restoration in a residue field of a hydropower station, and relates to a vegetation restoration method for a hydropower development area in a dry-hot valley of plateau.
Since the Three Gorges Hydropower Station was put into operation, hydropower construction has reached a climax, but the research on restorations of ecological problems caused by hydropower projects has just started. At present, the ecological restoration technology in hydropower development areas is mostly used for ecological restoration technology research on low altitude areas, waste residue areas in dry-hot valleys and water-level fluctuation zones in reservoir areas. The research on vegetation restoration and soil erosion control in the water-level fluctuation zones in the reservoir areas is mainly focused on the Three Gorges reservoir area, and more achievements have been made; a monitoring and early warning system for ecological and environmental problems on the water-level fluctuation zones is established in the water-level fluctuation zones in the Three Gorges reservoir area based on 3S technology, functional areas are divided, land use policies are optimized, and rural industries are adjusted to make rational use of the water-level fluctuation zones; and slope stabilization is carried out by using concrete slope protection greening technology and thick base material spraying vegetation slope protection technology, vegetation restoration is carried out at different heights to restore different vegetation types, a reasonable combination of arbor, shrub, grass and vine is used for vegetation restoration, and slope greening technology is also used to control non-point source pollution.
In China, the research on vegetation restoration of waste residue field of hydropower station mostly focuses on vegetation restoration technology of waste residue field in dry-hot valley at low altitude. Most hydropower stations are located in low altitude areas with sufficient temperature, so vegetation can be restored to some extent through natural succession of plants.
Chinese scholar Zhang Xinbao et al. (1996) thought that serious soil erosion, bare rock mass or thin soil were important limiting factors affecting vegetation restoration, put forward that the vegetation restoration pattern of rock and soil residue field is based on rock and soil types, in combination with climate, soil and topography, so as to determine a restoration strategy, and put a selection of suitable plant species in the first place. Lu Weili et al. (2011) investigated the waste residue field of hydropower station in the dry-hot valley of the Jinsha River, and found that after five years of restoration, there were 49 plant species belonging to 23 families and 45 genera, and the plant community was in the primary stage of secondary succession. Mu Jun et al. (2010)
studied the vegetation restoration technology in the waste residue field of the hydropower statid/505217 in the dry-hot valley of the Jinsha River, and showed that the treatment of water-retaining agent and water-retaining slow-release fertilizer had certain application value in the vegetation restoration of the waste residue field of the hydropower station in the dry-hot valley.
However, in the prior art, there is a lack of research on vegetation restoration in the waste residue field of the hydropower station in plateau area, especially a lack of methods for disturbed areas related to dry-hot valley with fragile ecological environment and great difficulty in vegetation restoration.
The present invention provides a vegetation restoration method for a hydropower development area in a dry-hot valley of a plateau, specifically, suitable plant species for vegetation restoration are screened out, restoration measures are provided, and the vegetation restoration of hydropower station residue fields in ecologically fragile areas is accelerated.
The present invention is realized by the following technical solutions: a vegetation restoration method for a hydropower development area in a dry-hot valley of a plateau, specifically, based on the gravelly ecological conditions in a dry-hot valley of southeast
Tibet with arid climate, artificial grassland planting and economic fruit forest planting are proposed for vegetation restoration; the artificial grassland planting is as follows: after a residue field is leveled, an agricultural film is laid for seepage control, then a soil layer with a thickness of 20-30 cm is used to cover and cattle and sheep manures are added for improvement; Avena sativa L. and/or Medicago sativa L. are/is used as grass variety/varieties, and furrow sowing is carried out in a way of deep-furrowing and shallow-covering; and a sowing rate of grass variety/varieties is 10-13 kg/mu; and irrigation is carried out after sowing; irrigation is carried out at a three-leaf stage, a five-to-six-leaf stage, a late jointing stage to a flowering stage and a milky stage of Avena sativa
L.; and irrigation is carried out once every 10 days from May to August; the economic fruit forest planting is as follows: before planting, the residue field is enclosed and leveled, planting holes are dug and the agricultural film is laid at bottoms to prevent seepage, then soil with a thickness of 40-50 cm is used to cover, cattle manures are added to improve the soil, then the soil with a thickness of 40-50 cm is used to cover, and finally the film with a thickness of 0.05-0.07 mm is used for covering; the planting season is from February to March, and Juglans regia L. seedlings with diameters of 3-4 cm are selected as saplings; before the Juglans regia L. seedlings are planted,
roots of Juglans regia L. seedlings are soaked in a rooting powder solution or dipped in mud, artd/505217 rooting powders are sown on the roots during planting; holes are made in middles of pre-arranged pits for Juglans regia L. seedling planting, and soil backfilling is carried out while compact stamping is carried out during the planting; and
Medicago sativa L. is sowed in the planting holes after soil covering, and then the film is used to cover; and after planting, soil ridges 10-20 cm higher than the ground level are built; after planting, each plant is irrigated with not less than 30 kg of root fixing water, and irrigated again seven days after planting; and field management is carried out until a completion of Juglans regia L. forest.
The artificial grassland planting specifically includes the following operations: 1) site leveling: after the residue field is leveled, an agricultural film with a thickness of 0.05-0.07 mm is laid for seepage control, 2) soil covering: soil covering with a soil layer thickness of 20-30 cm is carried out on the film; 3) soil improvement: cattle and sheep manures are added in the amount of 1000-1300 kg/mu to improve the soil; 4) artificial grassland planting: furrow sowing in a way of deep-furrowing and shallow-covering is adopted, purity and neatness of seeds are not less than 95%, and the germination rate is not less than 90%; and during the furrow sowing, a depth of furrow is 10-15 cm and a width is 10-15 cm, and a means of mixed sowing of Avena sativa L. and Medicago sativa L. is selected, with a mass ratio of 0.8-1 : 1-1.2; and 5) leveling is carried out after sowing, and then irrigation is carried out; and irrigation is carried out at a three-leaf stage, a five-to-six-leaf stage, a late jointing stage to a flowering stage and a milky stage of Avena sativa L..
The economic fruit forest planting specifically includes the following operations: 1) site leveling: planting holes of 80 cmx80 emx80 cm with a row spacing of 3 mx 3 m are dug in the leveled residue field; 2) sorting of planting holes: the agricultural film with a thickness of 0.05 mm is laid at the bottoms of the planting holes for seepage control and 40-50 cm of soil is used to cover; 4-5 kg/hole of cattle manures are added to improve the soil, and then 30-40 cm soil is used to cover; and finally, the film with a thickness of 0.05-0.07 mm is used for covering; 3) economic fruit forest planting: the planting season is from February to March, and
Juglans regia L. seedlings with diameters of 3-4 cm are selected for planting; injured and rotten roots of the seedlings are cut off before planting, the roots are soaked in a 100 mgkg' ABF/505217 rooting powder solution for one day, or dipped in mud; and rooting powders are sowed on the roots during planting; holes are made in middles of the pre-arranged pits for planting, soil backfilling is carried out while compact stamping is carried out during the planting, and the seedlings are to be straightened and the roots are to be stretched; and
Medicago sativa L. is sowed in the planting holes after soil covering so as to prevent soil water evaporation and increase nitrogen fixation effect, and then the film is used to cover to keep water; and soil ridges 20 cm higher than the ground level are built; 4) fertilization management: four times of fertilization is carried out before germination, after flower dropping, during the fruit hard-core period in early July and before land freezing; and animal manures and green manures are mixed with compound fertilizer to be applied, with 100-200 kg of animal manures or green manures for each bearing tree; and irrigation: irrigation is carried out once every two weeks in winter and spring.
Compared with the prior art, the present invention has the following beneficial effects.
The site conditions of the residue field in dry-hot valley of plateau are poor, and the residue pile is mainly gravel. In order to make full use of the local hydrothermal conditions, measures of water and fertilizer conservation are taken in the residue field to conduct artificial grassland planting, so as to improve a function of soil and water conservation and increase a supply capacity of pasture. In the present invention, a film of 0.05-0.07 mm is selected to cover the leveled residue field, the covering with the film is beneficial to keeping soil water and prevent water from seeping and losing from cracks of residues and stones, and the film with the thickness of 0.05-0.07 mm can be gradually degraded with time and does not pollute the environment. 1000-1300 kg/mu of cattle and sheep manures are added to improve the soil, and the cattle and sheep manures as organic fertilizer can improve soil texture and provide effective nutrients for plant growth.
The present invention adopts Avena sativa L. and Medicago sativa L. with large biomass and nitrogen fixation as planting plants; Avena sativa L. grows fast, has large biomass, and can bear fruit, thus being beneficial to increasing incomes of local herders; Medicago sativa L., a
Leguminosae plant, can fix nitrogen by itself and improve soil and has a high feeding value. A mixture of the two plants is beneficial to improving an efficiency of vegetation restoration and increasing the incomes of the local herders. In view of the characteristics of severe spring drought, easy moisture loss and difficult seedling protection in Tibet during planting, the seedling protection measure of deep-furrowing and shallow-covering is adopted to ensure a seedling emergence rate.
In the economic fruit forest planting, the agricultural film with a thickness of 0.05mm is lat¢/505217 on the bottoms of the planting holes for seepage control and 40-50 cm of soil is used to cover; 4-5 kg/hole of cattle manures are added to improve the soil, and then 30-40 cm soil is used to cover; and finally, the film with a thickness of 0.05-0.07mm is used for covering; and the 5 covering with the film is beneficial to keeping soil water and prevent water from seeping and losing from cracks of residues and stones, and the film with the thickness of 0.05-0.07mm can be gradually degraded with time and does not pollute the environment.
The combination of Medicago sativa L. and Avena sativa L. is selected for the artificial grassland planting of the present invention, survival rates of the two plants are high, and current coverage rates are over 90%; Juglans regia L. 1s selected for the economic fruit forest planting, and the survival rate is above 90%; a whole pilot area is basically covered with vegetation, and the control effect is good, thus accelerating the vegetation restorations of hydropower station residue fields in ecologically fragile areas. In addition, the economic fruit forest established by the present invention can also generate direct economic income by harvesting fruits. Through the implementation of economic fruit forest, production and living conditions of some farmers and herdsmen can be directly improved, employment opportunities can be increased, the transfer of surplus labor force of farmers and herdsmen to secondary and tertiary industries can be accelerated, the development of agricultural and pastoral areas can be promoted, and certain economic benefits can be produced.
FIG. 1 shows soil volumetric water contents with different covering thicknesses and with/without seepage control measures;
FIG. 2-1 shows detection results of aboveground biomass of artificial grassland with different soil covering thicknesses;
FIG. 2-2 shows detection results of underground biomass of artificial grassland with different soil covering thicknesses;
FIG. 3-1 shows contents of nutrients in Avena sativa L. leaves with different soil covering thicknesses;
FIG. 3-2 shows contents of nutrients in Medicago sativa L. leaves with different soil covering thicknesses;
FIG. 4 shows aboveground biomass of different grass variety combinations in artificial grassland;
FIG. 5 is a schematic diagram for vegetation restoration of artificial grassland;
FIG. 6 shows survival rates of Juglans regia L. seedlings with different soil covering thicknesses and with/without seepage control measures; and
FIG. 7 shows soil volumetric water contents with different soil covering thicknesses ahd/505217 with/without seepage control measures.
In the following, the present invention will be further explained in detail with specific examples that are meant to explain but not limit the present invention.
The present invention relates to a vegetation restoration method for a hydropower development area in a dry-hot valley of plateau, and is specifically illustrated by a vegetation restoration in a residue field of a hydropower station in a dry-hot valley of plateau at an altitude of 2,000-3,000 m. The residue field (Rongqu residue field) in the dry-hot valley of plateau is a typical geological condition in southeast Tibet, with fragile ecological environment; the residue field area is mainly formed by abandoned residue accumulation, with poor site conditions (mostly gravels), arid climate and difficult vegetation restoration; and the vegetation restoration technology of the residue field (Rongqu residue field) in the dry-hot valley of plateau is applicable to related engineering disturbance areas at an altitude of 2000-3000m. At the altitude of 2800m, 2900m and 3000m in upper reaches of Rumei Town, three sampling points (two on two sides of the valley and one at a bottom of the valley) are set up respectively, 27 soil seed bank samples are collected by small quadrats, and the soil seed bank is screened by seed germination method. According to preliminary statistics, at an altitude of 2800m, the number of seed banks is 248 grains/m?; at an altitude of 2900m, the number of seed banks is 416 seeds/m?; and at an altitude of 3000m, the number of seed banks is 315 grains /m?, and most species in the seed banks are Gramineae plants. Compared with the seed banks in the dry-hot valley of the
Jinsha River (1341.7 grains/m? 17 species; Zhang Jianli et al., 2008), the dry-hot valley of the
Minjiang River (average 890.0 grains /m°, 26 species; Li Yanjiao et al., 2015), the contents of soil seed banks are low and the number of species is less on the whole.
Therefore, according to the characteristics of local natural resources, it is necessary to use artificial intervention to restore vegetation. In the process of artificial vegetation restoration, technical means such as water conservation methods and rooting powder soaking are considered to be used.
In order to screen a vegetation restoration pattern of artificial grassland in residue field with both ecological and economic benefits, the vegetation restoration pattern of artificial grassland is screened through soil improvement, seepage control treatment, soil covering thickness, grass variety combination treatment and restoration effect monitoring in residue field. 1. Foundation improvement and seepage control treatment
Soil improvement: there is a considerable probability of gravel exposure in the residue fielHV505217 so gravels with thicknesses of 30 cm-40 cm and diameters of 10 cm-40 cm are paved to simulate a scene of the residue field;
In the leveled residue field, 2kg/m? cattle manures are added to improve the soil; and cattle and sheep manures as organic fertilizer can improve soil texture and provide effective nutrients for plant growth.
Seepage control treatment and soil covering thickness: a thickness of soil layer determines a water-holding capacity of the soil, and the soil covering thickness is set to be 10cm, 20cm, 30cm and 40cm for screening;
Seepage control treatment: the film with a thickness of 0.05-0.07mm is used for covering, the covering with film is beneficial to keeping soil water and prevent water from seeping and losing from cracks of residues and stones, and the film with the thickness of 0.05-0.07mm can be gradually degraded with time and does not pollute the environment.
After the above treatment, soil water, temperature and plant growth are simultaneously monitored.
Results of soil volumetric water contents with different soil covering thicknesses and with/without seepage control measures are shown in FIG. 1; the results show that the water contents at the depth of 10cm is low, because the Rongqu residue field belongs to a dry-hot valley of plateau with high temperature and strong sunshine, so that the soil water evaporates quickly and thus the volumetric water contents in the surface soil are low.
There is a big difference in the volumetric water contents between the soil with an impermeable layer and the soil without the impermeable layer, specifically, for the soil without the impermeable layer (15cm-CK, 30cm-CK), the soil with 15cm-CK has a higher volumetric water content at the depth of 15cm likely because soil crust causes a decrease of water evapotranspiration and a rise of water through capillary action, while the soil with 30cm-CK has the lowest volumetric water content at the depth of 30cm likely because bottoms are full of residues and stones and thus have a poor water retention. For the soil with the impermeable layer (15em-FS, 30em-FS), there is no significant difference in soil water content betwen the depth of 15cm and the depth of 30cm, indicating that soil water retention is maintained.
Contents of soil organic matter, total nitrogen, available phosphorus, available potash nitrogen and cation exchange capacity increase with an increase of soil covering thickness, indicating that the increase of soil covering thickness is beneficial to plant growth. Moreover, in case of soil covering of 20cm, the impermeable layer can increase the contents of organic matter, total nitrogen, available phosphorus and available potassium, while in case of the soil covering of 30cm, the impermeable layer has no significant effect on soil nutrients.
The aboveground biomass and underground biomass of artificial grassland in residue fiekd}505217 are further collected. After being dried and weighed, the aboveground biomass and underground biomass of artificial grassland in residue field are analyzed. Among them, FIG. 2-1 shows detection results of aboveground biomass of artificial grassland with different soil covering thicknesses; FIG. 2-2 shows detection results of underground biomass of artificial grassland with different soil covering thicknesses; FIG. 3-1 shows contents of nutrients in Avena sativa L. leaves with different soil covering thicknesses; and FIG. 3-2 shows contents of nutrients in Medicago sativa L. leaves with different soil covering thicknesses;
The specific data are shown in Table 1.
Table 1 Changes of soil nutrients with different soil covering thicknesses and with/without
Seepage control measures
Soil With/without |Restoration| pH Organic Total Available Available Alkaline Cation covering| seepage control| pattern matter nitrogen | phosphorus potassium | hydrolysis N | exchange ickness| measures (g/kg) (g/kg) (mg/kg) (mg/kg) (mg/kg) capacity (coml/kg) 10cm Natural Natural | 871 | 1438 | 1.140.1b | 14.15€1.3c | 77.69+2.6d | 147+22c | 544+23b restoration |restoration| + + 0.52 | 123¢ 10cm | Artificial | Artificial | 7.57 | 22.22 | 12+02b | 21.13+3.2b | 83.244564 | 13.48+13c | 622+12b restoration |restoration| + + 0.23 | 225 20cm | Without | Artificial | 8.62 | 23.71 | 1.5+02a | 26.82+3.1b | 110.9+95c | 36.75+42b | 7.3+1.6b impermeable |restoration| + + membrane 0.12 2.3% 20cm With Artificial | 8.31 [29.95+4.20| 1.8+0.1a | 35.23+2.6a | 2774+10.6b | 44.1+68b | 8.18+2.4b impermeable |restoration| + membrane 0.35 30cm | Without | Artificial | 8.65 | 48.81 | 2.540.2a | 35.39+3.5a | 2774x11.3b | 57.58+48a | 13.28+3.2a impermeable |restoration| + + membrane 0.41 3.26a 30cm With Artificial | 8.34 | 40.45 | 1.9+0.1a | 35.35+42a | 388.4+15.6a | 61.25+72a | 11.32+2.6a impermeable |restoration| + + membrane 0.52 1.56a
The results show that the vegetation can recover naturally after soil covering of 10cm, but the aboveground biomass is not as high as that of artificial grassland; the aboveground biomass in case of the soil covering of 20cm and the soil covering of 30cm is higher than that in case of the soil covering of 10cm; there is no significant difference in the aboveground biomass between at the soil covering of 20cm and at the soil covering of 30cm with/without seepage control measures; and the underground biomass is higher in the soil covering of 10cm, and there is no significant difference in the underground biomass between at the soil covering of 20cm and at the soil covering of 30cm with/without seepage control measures. From the above researd{}505217 results, it can be seen that soil covering of 10cm can also restore vegetation, but the biomass is low, and increasing the soil covering thickness can increase the biomass.
Therefore, selecting 20-30cm of soil layer thickness and seepage control treatment can maintain soil water content and ensure the survival of plants under the condition of large evaporation in the dry-hot valley of plateau. 2. Grass variety screening:
Plant diversity survey is carried out in the dry-hot valley of plateau (at an altitude of 2000-3000m).
Based on a survey method of florology and phytocoenology, four varieties, 1.e., Elymus dahuricus Turcz., Elymus sibiricus Linn., Medicago sativa L. and Avena sativa L., are selected as candidate grass varieties.
An artificial grassland is established for further screening: when 20g seeds are sown per square meter and plants are planted alone, the aboveground biomass of Avena sativa L. is the largest, while the aboveground biomass of Elymus dahuricus Turcz. and that of Elymus sibiricus
Linn. are the smallest; when two plants among the four varieties are planted in combination, the biomass of the combination of Medicago sativa L. and Avena sativa L. is the largest, while that of the combination of Elymus dahuricus Turcz. and Elymus sibiricus Linn. is the smallest. when three plants among the four varieties are planted in combination, the aboveground biomass of the combination of Medicago sativa L., Avena sativa L. and Elymus sibiricus Linn. is the largest, and the aboveground biomass of the combination of Medicago sativa L., Elymus dahuricus Turcz. and Elymus sibiricus Linn. is the smallest; and when four varieties are planted in combination, the aboveground biomass of the four varieties is not as high as that of one or two plant combinations. Screening results are shown in
FIG. 4, and the results show that Avena sativa L. has a large biomass and a fast growth rate;
Medicago sativa L. can fix nitrogen and increase soil nitrogen, while Elymus sibiricus Linn. and
Elymus dahuricus Turcz. can survive but are not suitably planted in the Rongqu residue field due to their small biomass, so it is more suitable to choose the combination of Medicago sativa L. and Avena sativa L. for artificial grassland planting in the Rongqu residue field.
Furthermore, the contents of nutrients in Avena sativa L. and Medicago sativa L. leaves with different soil covering thicknesses and with/without seepage control measures are analyzed. The contents of total nitrogen, total carbon and total phosphorus in Avena sativa L. increase with an increase of soil covering thickness, but there is no significant difference.
The contents of total nitrogen, total carbon and total phosphorus in the Medicago sativa FU505217 leave increase with the increase of soil covering thickness, but there is no significant difference.
The total nitrogen content of the Medicago sativa L. leave is significantly higher than that of the
Avena sativa L. leave, because Medicago sativa L. is a nitrogen-fixing plant and has higher total nitrogen content.
To sum up, the combination of Avena sativa L. and Medicago sativa L. can be used for the artificial grassland planting in the Rongqu residue field; although the vegetation can be restored by soil covering of 10cm, the aboveground biomass is low. By analyzing the changing trend of soil water content, it is suggested that the soil covering thickness of artificial grassland in the residue field is 20cm-30cm so as to ensure normal growths of herbs, and seepage control measures are taken to ensure better growths of plants.
The specific restoration measures of grassland in the dry-hot valley of plateau are given below. 1) Artificial grassland planting
A Site leveling
In the leveled residue field, an agricultural film with a thickness of 0.05-0.07mm is selected for covering. The covering with film is beneficial to keeping soil water and prevent water from seeping and losing from cracks of residues and stones, and the film with the thickness of 0.05-0.07mm can be gradually degraded with time and does not pollute the environment.
B Soil covering
Soil covering thickness is 20-30cm. A thickness of soil layer determines a water-holding capacity of the soil, and 20-30cm of thickness of soil layer can maintain soil water content and ensure the survival of plants under the condition of large evaporation in the dry-hot valley of plateau.
C Soil improvement 1000-1300kg/mu of cattle and sheep manures are added to improve the soil. The cattle and sheep manures as organic fertilizer can improve soil texture and provide effective nutrients for plant growth.
D Artificial grassland planting
The planted seeds meet the national seed grading standards, purity and neatness are not less than 95%, germination rate is not less than 90%, and the seeds are not allowed to carry quarantine objects. Avena sativa L. grows fast, has large biomass, and can bear fruit, thus being beneficial to increasing incomes of local herders; Medicago sativa L., a Leguminosae plant, can fix nitrogen by itself and improve soil and has a high feeding value. A mixture of the two plants is beneficial to improving an efficiency of vegetation restoration and increasing the incomes 6505217 the local herders.
E Sowing depth
In view of the characteristics of severe spring drought, easy moisture loss and difficult seedling protection in southeastern Tibet, the seedling protection measure of deep-furrowing and shallow-covering is adopted. For the improved soil, a depth of furrow is 10-15cm and a width is 10-15cm. A mixed sowing of Avena sativa L. and Medicago sativa L. is selected for furrow sowing in the amount of 10-13 kg/mu, with a mass ratio of 0.8:1.2-1:1.
F Field management
Leveling is carried out after sowing, and then irrigation is carried out.
Irrigation is carried out at a three-leaf stage, a five to six-leaf stage (about 15 days after the three-leaf stage), a late jointing stage, a flowering stage and a milky stage of Avena sativa L., and it is a guarantee of high yield of Avena sativa L..
In the dry-hot valley of plateau, due to the large evaporation and little rainfall from May to
August, irrigation times are increased, and irrigation is carried out once every 10 days. At the same time, the soil water is prevented from being too large and causing lodging of Avena sativa
L.
According to monitoring of soil temperature from November, 2015 to November, 2016, the lowest soil temperature of 0-15cm in the area in the Rongqu residue field is about 2.5°C, and a surface soil temperature changes greatly due to the strong sunshine in daytime. The temperature increases gradually with an increase of depth in winter, but decreases gradually with the increase of depth in spring. Generally speaking, the soil temperature in the Rongqu residue field never reaches below 0°C, namely, the temperature will not cause great freezing injury to plants in the whole winter. Therefore, in the process of vegetation restoration in the Rongqu residue field, it may not be necessary to treat the vegetation with heat preservation, thus providing a possibility of economic fruit forest planting; and in order to increase economic benefits while restoring vegetation, a restoration pattern of economic fruit forest planting in the residue field with the best ecological and economic benefits is proposed on the basis of grassland restoration (as shown in FIG. 5).
In view of the ecological conditions in the dry-hot valley of plateau, Juglans regia I. is selected for economic fruit forest planting in the residue field, and the planting pattern of Juglans regia L. is screened through seepage control treatment, soil covering thickness treatment and restoration effect monitoring:
Gravels with a thickness of 30 cm-40 cm and a diameter of 10 cm-40 cm are paved in the planting holes to simulate a scene of the residue field; the planting holes are 50-60 cm, 70-80 cm and 90-100 cm in the soil covering thicknesses and subjected to seepage control treatment; 414/505217 kg.m”"/hole of cattle manures are added to improve the soil; Juglans regia L. with diameters of 3 cm-4 cm are selected for planting, and the roots of Juglans regia L. are soaked in 100 mg kg” rooting powder solution; and ten Juglans regia L. seedlings are planted in each treatment, and soil water and plant survival rate are monitored at the same time.
Survival rates of Juglans regia L. seedlings with different soil covering thicknesses and with/without seepage control measures are shown in FIG. 6, and results of soil volumetric water contents with different soil covering thicknesses and with/without seepage control measures are shown in FIG. 7. The results show that the water contents at the depth of 15cm is low, because the Rongqu residue field belongs to a dry-hot valley of plateau with high temperature and strong sunshine, so that the soil water evaporates quickly and thus the volumetric water contents in the surface soil are low;
There is a big difference in volumetric water content between the soil with an impermeable layer and without the impermeable layer, specifically, for the soil without the impermeable layer (60cm-CK, 80cm-CK), the volumetric water content at the depths of 60cm and 80cm is similar to that at the depth of 15cm likely because bottoms are full of residues and stones and thus have a poor water retention, and the water content changes greatly with time;
For the soil with the impermeable layer (60cm-FS, 80cm-FS), there is no significant difference in soil water content at the depth of 60cm and 80cm, indicating that soil water retention is maintained, and there is no significant difference in soil water content between at the depths of 60cm and 80cm and at the depth of 100cm with or without impermeable measures.
To sum up, according to the survival rates of Juglans regia L. seedlings, the changes of soil volumetric water content and the economic cost of soil covering thickness, it is suggested that the soil covering thickness is 70-80cm in the process of planting Juglans regia L. in the residue field, and at the same time, some seepage control measures are taken (planting holes are laid with film to prevent seepage and subjected to soil covering of 80 cm) to maintain soil water and nutrients. According to the monitoring of soil water, in the dry-hot valley of plateau, once irrigation a week in winter and spring is paid attention to be conducted, so as to be beneficial to the survival of economic fruit forest.
The following specific measures are given to restore vegetation by economic fruit forest planting:
A Site leveling
Planting holes of 80cmx80cmx80em with a row spacing of 3 mx 3 m are dug in the leveled residue field.
B Sorting of planting holes
An agricultural film with a thickness of 0.05mm is laid on the bottoms of the planting hol&$/505217 for seepage control and 40-50 cm of soil is used to cover; 4-5 kg/hole of cattle manures are added to improve the soil, and then 30-40 cm soil is used to cover; and finally, the film with a thickness of 0.05-0.07mm is used for covering. The covering with the film is beneficial to keeping soil water and prevent water from seeping and losing from cracks of residues and stones, and the film with the thickness of 0.05-0.07mm can be gradually degraded with time and does not pollute the environment.
C Economic fruit forest planting
The planting season is from February to March (when plants in dry-hot valley of plateau begin to grow).
Seedlings with intact taproots and lateral roots are selected, without pests and diseases, and with strong resistance. Juglans regia L. seedlings with diameters of 3 cm-4 cm are selected for planting; injured and rotten roots of the seedlings are cut off before planting, the roots are soaked in a 100mg/kg rooting powder solution for one day, or dipped in mud, so as to make the roots absorb water for survival; and rooting powders are sowed on the roots during planting;
Holes (with sizes depending on the seedlings) are made in middles of the pre-arranged pits for planting; soil backfilling is carried out while compact stamping is carried out during the planting, so as to straighten the seedlings and stretch the roots; and Medicago sativa L. is sowed in the planting holes after soil covering so as to prevent soil water evaporation and increase nitrogen fixation effect, and then the film is used to cover to keep water; and
Soil ridges about 20 cm higher than the ground level are built, and the ridges can collect rainwater; and after planting, each plant is irrigated with not less than 30kg of root fixing water, and irrigated again seven days after planting.
D Fertilization management
Economic fruit forest has high requirements for fertilizer and water. Four times of fertilization is carried out before germination, after flower dropping, during the fruit hard-core period in early July and before land freezing, so as to be beneficial to germination, branching and flowering, and promote fruit hypertrophy and full kernel. Animal manures and green manures are mixed with compound fertilizer to be applied, with 100-200 kg of animal manures or green manures for each bearing tree.
Irrigation: the dry-hot valley of plateau is dry in winter and spring, and the evaporation is large and the rainfall is small, so irrigation is carried out once every two weeks in winter and spring.
The combination of Medicago sativa L. and Avena sativa L. is selected for the artificial grassland planting of the present invention, and survival rates of the two plants are high, and current coverage rates are over 90%; Juglans regia L. is selected for the economic fruit forest/505217 planting, and the survival rate is above 90%; and a whole pilot area is basically covered with vegetation, and the control effect is good. In addition the economic fruit forest established by the present invention can also generate direct economic income by harvesting fruits.
The above examples are excellent examples to realize the present invention, and the present invention is not limited to the above examples. Any non-essential additions and substitutions made by the skilled in the art according to the technical features of the technical solutions of the present invention belong to the protection scope of the present invention.
Claims (4)
1. A vegetation restoration method for hydropower development area in dry-hot valley of plateau, wherein, based on gravelly ecological conditions in the dry-hot valley of southeast Tibet with arid climate, artificial grassland planting and economic fruit forest planting are proposed for vegetation restoration; the artificial grassland planting is as follows: after a residue field is leveled, an agricultural film is laid for seepage control, then a soil layer with a thickness of 20-30cm is used to cover and cattle and sheep manures are added for improvement; Avena sativa L. and/or Medicago sativa L. is/are used as a grass variety/varieties, and furrow sowing is carried out in a way of deep-furrowing and shallow-covering; and a sowing rate of grass variety/varieties is 10-13kg/mu; and irrigation is carried out after sowing; irrigation is carried out at a three-leaf stage, a five-to-six-leaf stage, a late jointing stage, a flowering stage and a milky stage of Avena sativa L.; and irrigation is carried out once every 10 days from May to August; The economic fruit forest planting is as follows: before planting, the residue field is enclosed and leveled, planting holes are dug and the agricultural film is laid at bottoms to prevent seepage, then soil with a thickness of 40-50 cm is used to cover, cattle manures are added to improve the soil, then the soil with a thickness of 40-50cm is used to cover, and finally the film with a thickness of 0.05-0.07mm is used for covering; the planting season is from February to March, and Juglans regia L. seedlings with diameters of 3 cm-4 cm are selected as saplings; before the Juglans regia L. seedlings are planted, roots of the Juglans regia L. seedlings are soaked in a rooting powder solution or dipped in mud, and rooting powders are sown on the roots during planting; holes are made in middles of the whole pits for Juglans regia L. seedling planting, and soil backfilling is carried out while compact stamping is carried out during the planting; Medicago sativa L. is sowed in the planting holes after soil covering, and then the film is used to cover; and after planting, soil ridges 10-20 cm higher than the ground level are built; after planting, each plant is irrigated with not less than 30kg of root fixing water, and irrigated again seven days after planting; and field management is carried out until a completion of Juglans regia L. forest.
2. The vegetation restoration method for hydropower development area in dry-hot valley of plateau according to claim 1, wherein the artificial grassland planting specifically comprises the following operations:
1) site leveling: after the residue field is leveled, an agricultural film with a thickness &P505217
0.05~0.07mm is laid for seepage control; 2) soil covering: soil covering with a soil layer thickness of 20-30cm is carried out on the film; 3) soil improvement: cattle and sheep manures are added in the amount of 1000-1300 kg/mu to improve the soil; 4) artificial grassland planting: furrow sowing in a way of deep-furrowing and shallow-covering is adopted, purity and neatness of seeds are not less than 95%, and the germination rate is not less than 90%; and during the furrow sowing, a depth of furrow is 10-15cm and a width is 10-15cm, and a mixed sowing of Avena sativa L. and Medicago sativa L. is selected, with a mass ratio of 0.8-1 :
1-1.2; and 5) leveling is carried out after sowing, and then irrigation is carried out; and irrigation is carried out at a three-leaf stage, a five-to-six-leaf stage, a late jointing stage, a flowering stage and a milky stage of Avena sativa L..
3. The vegetation restoration method for hydropower development area in dry-hot valley of plateau according to claim 1, wherein the economic fruit forest planting specifically comprises the following operations: 1) site leveling: planting holes of 80cmx80emx80cm with a row spacing of 3 mx3 m are dug in the leveled residue field; 2) sorting of planting holes: the agricultural film with a thickness of 0.05mm is laid on the bottoms of the planting holes for seepage control and 40-50 cm of soil is used to cover; 4-5 kg/hole of cattle manures are added to improve the soil, and then 30-40 cm soil is used to cover; and finally, the film with a thickness of 0.05-0.07mm is used for covering; 3) economic fruit forest planting: the planting season is from February to March, and Juglans regia L. seedlings with diameters of 3 cm-4 cm are selected for planting; injured and rotten roots of the seedlings are cut off before planting, the roots are soaked in a 100mg kg" ABT rooting powder solution for one day, or dipped in mud; and rooting powders are sowed on the roots during planting; holes are made in middles of the pre-arranged pits for planting, and soil backfilling is carried out while compact stamping is carried out during the planting, so as to straighten the seedlings and stretch the roots;
Medicago sativa L. is sowed in the planting holes after soil covering so as to prevent sdi/505217 water evaporation and increase nitrogen fixation effect, and then the film is used to cover to keep water; and soil ridges 20 cm higher than the ground level are built;
4) fertilization management: four times of fertilization is carried out before germination,
after flower dropping, during the fruit hard-core period in early July and before land freezing; and animal manures and green manures are mixed with compound fertilizer to be applied, with 100-200 kg of animal manures or green manures for each bearing tree; and irrigation: irrigation is carried out once every two weeks in winter and spring.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211400296.7A CN115868377A (en) | 2022-11-09 | 2022-11-09 | Method for recovering vegetation in hydropower development area of dry and warm valley of plateau |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU505217B1 true LU505217B1 (en) | 2024-03-28 |
Family
ID=85759596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU505217A LU505217B1 (en) | 2022-11-09 | 2023-09-28 | Vegetation Restoration Method for Hydropower Development Area in Dry-hot Valley of Plateau |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115868377A (en) |
| LU (1) | LU505217B1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1292881C (en) * | 1987-12-23 | 1991-12-10 | Stauffer Chemical Company Division Of Rhone-Poulenc, Inc. | Fine textured soil reclamation method |
| CN204443324U (en) * | 2015-02-01 | 2015-07-08 | 吴帆 | Stony desertification provincial characteristics is utilized to plant greening structure |
| CN107318418A (en) * | 2017-07-04 | 2017-11-07 | 华能澜沧江水电股份有限公司 | A kind of Subalpine region arid area artificial pasture planting and establishing method |
| CN108718863B (en) * | 2018-05-11 | 2021-05-11 | 中国科学院、水利部成都山地灾害与环境研究所 | Method for planting walnut fruit bearing forest in dry and warm valley residue field in alpine region |
| CN108782046A (en) * | 2018-06-01 | 2018-11-13 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of method that dry-warm valley cinder field in High-cold regions builds artificial pasture |
| CN110972593A (en) * | 2019-10-23 | 2020-04-10 | 中国科学院、水利部成都山地灾害与环境研究所 | Ecological restoration method for vegetation in dry and warm river valley barren slope land in western Sichuan |
| CN115119563A (en) * | 2022-03-25 | 2022-09-30 | 韶关地质工程勘察院有限公司 | Ecological restoration method for pyrite mine waste land |
-
2022
- 2022-11-09 CN CN202211400296.7A patent/CN115868377A/en active Pending
-
2023
- 2023-09-28 LU LU505217A patent/LU505217B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CN115868377A (en) | 2023-03-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107926188B (en) | Method for improving coastal saline-alkali soil by plant intercropping | |
| CN109757146B (en) | Method for ecological greening of seaside saline-alkali sand land by utilizing salt-tolerant plants | |
| CN107333543A (en) | A kind of method of stony desertification restoration of the ecosystem | |
| CN107821018B (en) | Vegetation recovery method for promoting progressive deteriorated grassland in permafrost region | |
| CN105917903B (en) | A kind of soil thin layer stony cut slope corrodes the soil and water conservation method on abrupt slope | |
| CN110447448A (en) | A kind of beach saline land garden landscape plant cultivation method | |
| CN107318418A (en) | A kind of Subalpine region arid area artificial pasture planting and establishing method | |
| CN104488394A (en) | Comprehensive improvement method for salinized soil | |
| CN101960967A (en) | Plant seedling nutritive cube applied to ecological slope protection and application method thereof | |
| Thind et al. | Response of cotton to various levels of nitrogen and water applied to normal and paired sown cotton under drip irrigation in relation to check-basin | |
| CN110583342A (en) | Wolfberry orchard grass growing planting method | |
| CN102630477A (en) | Method for high-yield plantation of Salicornia and soil fertility improvement of coastal mud flat | |
| CN110199826B (en) | Method for restoring degraded grassland ecosystem by planting leymus chinensis | |
| CN102742432A (en) | Method for no-tillage plantation of grassland in water-level-fluctuating zone | |
| CN102907292B (en) | Method for restoring vegetations of subalpine Betula ermanii forest belt in Changbai Mountain | |
| CN116965190B (en) | Rapid reconstruction method of grass hill wetland | |
| CN105794484A (en) | No-tillage planting method of tomato in northern Suzhou intertidal zone saline-alkali soil | |
| CN1122439C (en) | Rice and hydrophyte cultivating method mulched in whole course | |
| DE102023130746A1 (en) | A method for restoring vegetation in a high-altitude region for hydropower development | |
| CN108040730A (en) | A kind of North-West Sichuan alpine sandy land sea-buckthorn method for planting | |
| CN109526606B (en) | Method for inducing open field natural vegetation to quickly recover | |
| CN108811581B (en) | Method for improving coastal heavy saline-alkali soil | |
| CN110024610A (en) | A kind of ternary preserving soil moisture method of Karst Rocky Desertification Region agroforest system | |
| LU505217B1 (en) | Vegetation Restoration Method for Hydropower Development Area in Dry-hot Valley of Plateau | |
| CN105935023A (en) | Method of performing original soil greening on sulfate-containing sandy soil by using vermiculite-containing nutrient soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20240328 |