CN113317104A - Method for building mixed forest of south mountain Dengen eucalyptus and fir - Google Patents
Method for building mixed forest of south mountain Dengen eucalyptus and fir Download PDFInfo
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- 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
- A01G17/005—Cultivation methods
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
- A01C21/005—Following a specific plan, e.g. pattern
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/40—Afforestation or reforestation
Abstract
The invention provides a method for building a dunn eucalyptus dunnii and fir mixed forest in a south mountain land, which comprises the steps of land selection, land preparation, mixed forest establishment and tending management, wherein a land block with a deep soil layer and no water accumulation is selected as a planting area in the south mountain land, holes are dug according to specifications, dunn eucalyptus dunnii and fir seedlings are selected according to a proportion, the forestation time is staggered, the forestation is carried out in a strip mixed mode, and the forest branch tending management after the forestation is implemented according to related standards. According to the method, the Dengen eucalyptus dunnii and the fir are mixed, so that the damage of cold tides in winter in the mountains in south mountains can be overcome, the ecological function of a mixed forest can be achieved, and the economic benefit can be rapidly obtained.
Description
Technical Field
The invention belongs to the technical field of forestry cultivation, and relates to a method for constructing a mixed forest of eucalyptus and fir, in particular to a method for constructing a mixed forest of eucalyptus and fir in a south mountain land.
Background
China is a country with the largest area of artificial forests in the world, pure forest forests are mainly used as forests for fast growing and short felling periods, soil fertility of forest lands is continuously reduced due to unbalanced long-term collection and expenditure of soil nutrients, continuous planting productivity of the artificial forests is also remarkably reduced, the artificial forests for Chinese fir are most remarkably reduced, and meanwhile, diseases and insect disasters are caused frequently due to single tree species and small number of natural enemy species. The construction of the artificial mixed forest is an effective way for promoting the sustainable development of the artificial forest, and the mixed forest plays an important role in improving the soil of forest lands, adjusting the microclimate of forest stands, increasing the biodiversity, reducing the plant diseases and insect pests and the like.
China fir is one of the main fast-growing wood species in south China, can be maturely utilized in 20-30 years generally, and south mountain land is the central production area of China fir. In order to avoid the reduction of the continuous productivity of artificial pure Chinese fir forest, the construction of Chinese fir and pine mixed forest and Chinese fir and firepower nan mixed forest is the main measure in recent years in south mountain land. The fir rotation-felling period is 15-20 years, the pine rotation-felling period is 20-25 years, the firepower nanmu rotation-felling period is 22-30 years, the planting time is long, so that the investment return is slow, economic benefits are difficult to obtain in a short period, and most forest farmers are difficult to continuously operate.
The eucalyptus is a fast-growing and high-yield tree species introduced in China, the rotation cutting period is 5-7 years, the planting time is short, and the investment return is fast. However, the eucalyptus trees are various in varieties and less in cold-resistant varieties, and the cold tide in the mountains of south mountains is a cold tide in winter, so that the cold-resistant varieties are easily damaged, and how to build the eucalyptus and cedar mixed forest in the mountains of south mountains becomes a new research hotspot.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for building a mixed forest of south mountain Dengdenchus and China fir, which can overcome cold tides in winter, can play the ecological function of the mixed forest and can quickly obtain economic benefits.
In order to achieve the above object, the technical solution of the present invention is as follows:
a method for building a dunn eucalyptus dunnii and fir mixed forest in a south mountain land comprises the steps of land selection, land preparation, mixed forest establishment and tending management, a land block with a deep soil layer and no water accumulation is selected as a planting area in the south mountain land, holes are dug according to specifications, dunn eucalyptus dunnii and fir nursery stocks are selected according to a proportion, the forest establishment time is staggered sequentially, the forest establishment is carried out in a band-shaped mixed mode, and the forest stand tending management after the forest establishment is implemented according to relevant standards; the main operation steps are as follows:
(1) land selection and preparation: selecting a land block with a deep soil layer and no water accumulation as a planting area in the mountainous region of the south ridge in winter of the year before afforestation, removing weeds and miscellaneous trees in the planting area, and ploughing and loosening the soil layer; digging holes on the vertical contour line in the planting area, wherein the specifications are that the hole surface width is 60cm, the hole bottom width is 40cm, the hole depth is 35cm, and 1kg of base fertilizer is put in each hole;
(2) mixed afforestation:
mixing: adopting strip mixed crossing, wherein the afforestation proportion is 7 rows of Dengyen Eucalyptus and 3 rows of Chinese fir, the row trend is vertical to the contour line, the plant row spacing is 2m multiplied by 3m, and the row spacing of the adjacent Dengyen Eucalyptus and Chinese fir is 6 m;
selecting nursery stocks: selecting 2-year-old strong Chinese fir naked-root seedlings with the seedling height of 55-60 cm; selecting 6-8 months old robust seedlings with the height of 15-20cm and eucalyptus dunnii maiden in a container;
mixing time: forestation of fir in 2-3 months, and forestation of eucalyptus dunnii in 5-6 months in the same year;
and fourthly, fertilizing: applying additional fertilizer for 5 times, wherein the first year of additional fertilizer is 0.75kg per plant (hole) 45-60 days after afforestation, and the second, third, fourth and fifth years of additional fertilizer are 0.75kg per plant (hole) in 3-5 months; the first three topdressing and the last two topdressing are different in fertilizer;
pruning; carrying out one-time artificial pruning on the eucalyptus dunnii in 10 months after forestation, wherein the pruning strength is to be maintained to a tree trunk 1/2;
(3) tending management: forest stand tending management is performed according to the Dunn Eucalyptus dunnii artificial forest cultivation technical regulation (DB45/T1378-2016) and the China fir fast-growing high-yield forest cultivation technical regulation (DB 45/T470-2015).
Preferably, the Chinese fir bare-rooted seedlings and the Dengen eucalyptus containerized seedlings are seedlings which are free of diseases, insect pests and mechanical damage, high in lignification degree and developed in root systems and are obtained through conventional container seedling cultivation; watering the seedlings thoroughly before lifting, properly trimming the seedlings during lifting, reserving 3-4 leaves, trimming 1/2 at the tail end of the reserved leaves, and reducing water evaporation; the seedlings are planted along with the seeds.
Preferably, 1000kg of the base fertilizer in the step (1) comprises: 116kg of urea containing N46% and P2O5350kg of 20 percent calcium magnesium phosphate fertilizer containing N10 percent and P2O542% NH4H2PO4167kg, containing K2KCl83kg with the content of O60%, borax 10kg with the content of B11%, ZnSO with the content of Zn24%4·7H2O4kg, CuSO containing Cu25%4·5H2O6kg, containing 129kg of tung bran with 70% of organic matters, and the balance of filling materials; 1000kg of fertilizer used for the three additional manuring before the step (2) comprises: 301kg of urea containing 46.5% of N and P2O5450kg of 20 percent calcium magnesium phosphate fertilizer containing K2O63% of KCl159kg, 10kg of borax containing B11%, and ZnSO containing Zn24%4·7H2O8kg, CuSO containing Cu25%4·5H2O8kg, and the balance water; 1000kg of fertilizer used for the two topdressing after the step (2) comprises: 223kg of urea containing 46.5% of N and P2O5200kg of 20 percent calcium magnesium phosphate fertilizer containing 12 percent of N and P2O544% NH4H2PO4136kg, containing K2KCl206kg with O63%, borax 10kg with B11%, ZnSO with Zn24%4·7H2O8kg, CuSO containing Cu25%4·5H2O8kg, and the balance moisture.
Compared with the prior art, the invention has the advantages and positive effects as follows:
1. aiming at the physical and chemical properties of the soil of the south mountain land and different requirements of mixed trees on nutrients, special base fertilizer and additional fertilizer are designed,
the normal nutrient requirements of the eucalyptus dunnii maiden and the fir can be met, the nutrient content of the soil trace elements can be obviously improved, and the soil acidification problem of the forest land is solved.
2. The Dengen eucalyptus has the advantages of short rolling period of 5-7 years, and is also a rare species of summer rain type, fast-growing and high-yield eucalyptus trees with strong cold resistance, and the wood basic density of the artificially cultivated Dengen eucalyptus trees of 10 years old is 500kg/m3On the left and right sides, the wood has straight grains and light white heartwood, can be made into fiber pulp for 5 years, also can be used for cultivating large-diameter-grade solid wood, and has better economic benefit; the dunn eucalyptus dunnii and the fir are mixed, so that the damage of cold tides in the south mountain in winter can be overcome, the ecological function of mixed forests can be achieved, and economic benefits can be rapidly obtained.
3. Because the growth habits of the Dengen eucalyptus and the fir are different, the rotation-cutting periods are different, the Dengen eucalyptus is fellable for 5 years, the rotation-cutting period of the fir is 15-20 years, mutual interference is easy to generate during felling, and the forest is pressed down during felling.
4. Because the fir seedling stage grows slowly, the invention selects fir and Dengyen eucalyptus seedlings of different ages for afforestation, specifically selects 2-year-old fir bare-rooted seedlings and 6-8-month-old Dengyen eucalyptus container seedlings, and the fir seedling afforestation time is earlier than about 3 months of Dengyen eucalyptus, and the reasonable mixed crossing is carried out, and the mixed crossing effect is good.
5. The Dengen eucalyptus globulus has more lateral branches and poorer natural pruning capability, the cold tide in the south mountain land is frequent in winter, excessive branches and leaves are easy to fall down by frozen forest trees, and the excessive lateral branches need to absorb more nutrients to influence the growth of the tree height; after forestation, one-time artificial pruning is carried out on the eucalyptus dunnii maiden in 10 months, and the pruning strength is that the eucalyptus dunnii maiden is pruned to the position 1/2 of the trunk, so that the growth of forest trees can be effectively promoted, and the harm of cold tides can be reduced to the maximum extent.
Drawings
FIG. 1 is a real view of the present invention.
Detailed Description
The present invention is further illustrated by the following specific examples.
Example 1:
a method for building a mixed forest of south mountain Dengen eucalyptus and fir comprises the following main operation steps:
(1) land selection and preparation: selecting a land block with a deep soil layer and no water accumulation as a planting area in a saline water forest farm in the quan-Zhou county of Guangxi in 2015 winter, removing weeds and miscellaneous trees in the planting area, and ploughing and loosening the soil layer; digging holes on the vertical contour line in the planting area, wherein the specifications are that the hole surface width is 60cm, the hole bottom width is 40cm, the hole depth is 35cm, and 1kg of base fertilizer is put in each hole; 1000kg of base fertilizer comprises: 116kg of urea containing N46% and P2O5350kg of 20 percent calcium magnesium phosphate fertilizer containing N10 percent and P2O542% NH4H2PO4167kg, containing K2KCl83kg with the content of O60%, borax 10kg with the content of B11%, ZnSO with the content of Zn24%4·7H2O4kg, CuSO containing Cu25%4·5H2O6kg, containing 129kg of tung bran with 70% of organic matters, and the balance of filling materials;
(2) mixed afforestation:
mixing: adopting strip mixed crossing, wherein the afforestation proportion is 7 rows of Dengyen Eucalyptus and 3 rows of Chinese fir, the row trend is vertical to the contour line, the plant row spacing is 2m multiplied by 3m, and the row spacing of the adjacent Dengyen Eucalyptus and Chinese fir is 6 m;
selecting nursery stocks: selecting naked-root fir seedlings which are 2 years old, 55-60cm high, robust, free of diseases and insect pests and mechanical damage, high in lignification degree and developed in root systems; selecting 6-8-month-old seedlings in a dunn eucalyptus container, wherein the seedlings are strong and have the height of 15-20cm, no plant diseases, insect pests and mechanical damage, high lignification degree and developed root systems; watering the seedlings thoroughly before lifting, properly trimming the seedlings during lifting, reserving 3-4 leaves, trimming 1/2 at the tail end of the reserved leaves, and reducing water evaporation; the nursery stock is planted along with the nursery stock;
mixing time: carrying out fir forestation in 2-3 months in 2016, carrying out the forestation of the eucalyptus dunnii in 5-6 months in the same year, topdressing for 1 time in the current year, and applying 500g of compound fertilizer in each hole;
and fourthly, fertilizing: applying additional fertilizer for 5 times, wherein the first year of additional fertilizer is 0.75kg per plant (hole) 45-60 days after afforestation, and the second, third, fourth and fifth years of additional fertilizer are 0.75kg per plant (hole) in 3-5 months; 1000kg of fertilizer used in the first three topdresses comprises: 301kg of urea containing 46.5% of N and P2O5450kg of 20 percent calcium magnesium phosphate fertilizer containing K2O63% of KCl159kg, 10kg of borax containing B11%, and ZnSO containing Zn24%4·7H2O8kg, CuSO containing Cu25%4·5H2O8kg, and the balance water; 1000kg of fertilizer used for the last two topdressing contains: 223kg of urea containing 46.5% of N and P2O5200kg of 20 percent calcium magnesium phosphate fertilizer containing 12 percent of N and P2O544% NH4H2PO4136kg, containing K2KCl206kg with O63%, borax 10kg with B11%, ZnSO with Zn24%4·7H2O8kg, CuSO containing Cu25%4·5H2O8kg, and the balance water;
pruning; carrying out one-time artificial pruning on the eucalyptus dunnii in 10 months after forestation, wherein the pruning strength is to be maintained to a tree trunk 1/2;
(3) tending management: forest stand tending management is performed according to the Dunn Eucalyptus dunnii artificial forest cultivation technical regulation (DB45/T1378-2016) and the China fir fast-growing high-yield forest cultivation technical regulation (DB 45/T470-2015).
Comparative example 1:
the difference from the embodiment 1 is that a strip mixed mode is adopted, and the afforestation ratio is 5 rows of Dengyen Eucalyptus and 5 rows of Chinese fir.
Comparative example 2:
the difference from the example 1 is that the mixing ratio of the eucalyptus dunnii maiden to the fir is 7:3 by adopting a star mixing mode.
Comparative example 3:
the difference from the example 1 is that the dunn eucalyptus dunnii seedlings and the fir seedlings are forested at the same time in 2016 for 2-3 months.
Comparative example 4:
the difference from the example 1 is that the eucalyptus dunnii was not artificially pruned after forestation.
Comparative example 5:
the difference from the example 1 is only that the selected Chinese fir seedlings are Chinese fir container seedlings which grow for 2 years, have 55-60cm high strength, are free from diseases and insect pests and mechanical damage and are provided with substrates through conventional container cultivation.
Comparative example 6:
the difference from the example 1 is only that only fir seedlings are selected for pure forest planting.
Comparative example 7:
the difference from the example 1 is only that only the seedlings of the eucalyptus dunnii dunn are selected for pure forest planting.
Comparative example 8:
the difference from the embodiment 1 is that the common eucalyptus additional fertilizer 40 (17-8-15) is selected from the eucalyptus dunnii, and the common fir additional fertilizer 30 (11-11-8) is selected from the fir.
The measurement of example 1 and comparative examples 1 to 8 was carried out at 2 months in 2021, 9 samples each having an area of not less than 400m were set for each case2And carrying out detection on each tree, and measuring the tree height by adopting a height measuring instrument and a height measuring rod, wherein the number of measured plants in each sample is not less than 30. The preservation rate and the average tree height of each case forest were calculated using the average of 9 samples. The specific results are shown in Table 1.
TABLE 1 determination results of forest preservation ratio and tree height after afforestation
As can be seen from the data in table 1:
(1) as can be seen from the embodiment 1 and the comparative example 1, by adopting the mixed forest construction method, the Chinese fir preservation rate is improved by 5 percent, and the average tree height of the Chinese fir is improved by 18.75 percent;
(2) as can be seen from the embodiment 1 and the comparative example 2, by adopting the mixed forest construction method, the Chinese fir preservation rate is improved by 27 percent, and the average tree height of the Chinese fir is improved by 40.74 percent;
(3) as can be seen from the embodiment 1 and the comparative example 3, by adopting the mixed forest construction method, the Chinese fir preservation rate is improved by 19 percent, and the average tree height of the Chinese fir is improved by 35.71 percent;
(4) as can be seen from the embodiment 1 and the comparative example 4, by adopting the mixed forest construction method, the Chinese fir preservation rate is improved by 7 percent, and the average tree height of the Chinese fir is improved by 8.57 percent; the average tree height of the eucalyptus dunnii maiden is improved by 17.72 percent;
(5) as can be seen from the embodiment 1 and the comparative example 5, by adopting the mixed forest construction method, the Chinese fir preservation rate is improved by 7 percent, and the average tree height of the Chinese fir is improved by 15.15 percent;
(6) as can be seen from the embodiment 1 and the comparative example 6, by adopting the mixed forest construction method, the Chinese fir preservation rate is improved by 23 percent, and the average tree height of the Chinese fir is improved by 46.15 percent;
(7) as can be seen from the examples 1 and the comparative examples 7, the mixed crossing of the Eucalyptus dunnii and the Chinese fir does not affect the growth of the Eucalyptus dunnii, still has the advantages of fast growth and high yield, and the economic benefit returns quickly;
(8) as can be seen from the example 1 and the comparative example 8, by adopting the mixed forest construction method, the average tree height of the Eucalyptus dunnii is improved by 9%, and the average tree height of the Chinese fir is improved by 35.71%.
From the above, the method for constructing the mixed forest not only can play the ecological function of the mixed forest, but also can promote the growth of the fir and improve the preservation rate of the fir.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. A method for building a mixed forest of south mountain Dengen eucalyptus and fir is characterized by comprising the following steps: selecting a land block with a deep soil layer and no water accumulation as a planting area in a mountain region of south mountains, digging holes according to specifications, selecting Eucalyptus dunnii and Chinese fir nursery stocks according to a proportion and staggered afforestation time, performing afforestation by adopting a strip mixed crossing mode, and performing forest stand tending management after afforestation according to related standards; the main operation steps are as follows:
(1) land selection and preparation: selecting a land block with a deep soil layer and no water accumulation as a planting area in the mountainous region of the south ridge in winter of the year before afforestation, removing weeds and miscellaneous trees in the planting area, and ploughing and loosening the soil layer; digging holes on the vertical contour line in the planting area, wherein the specifications are that the hole surface width is 60cm, the hole bottom width is 40cm, the hole depth is 35cm, and 1kg of base fertilizer is put in each hole;
(2) mixed afforestation:
mixing: adopting strip mixed crossing, wherein the afforestation proportion is 7 rows of Dengyen Eucalyptus and 3 rows of Chinese fir, the row trend is vertical to the contour line, the plant row spacing is 2m multiplied by 3m, and the row spacing of the adjacent Dengyen Eucalyptus and Chinese fir is 6 m;
selecting nursery stocks: selecting 2-year-old strong Chinese fir naked-root seedlings with the seedling height of 55-60 cm; selecting 6-8 months old robust seedlings with the height of 15-20cm and eucalyptus dunnii maiden in a container;
mixing time: forestation of fir in 2-3 months, and forestation of eucalyptus dunnii in 5-6 months in the same year;
and fourthly, fertilizing: applying additional fertilizer for 5 times, wherein the first year of additional fertilizer is 0.75kg per plant (hole) 45-60 days after afforestation, and the second, third, fourth and fifth years of additional fertilizer are 0.75kg per plant (hole) in 3-5 months; the first three topdressing and the last two topdressing are different in fertilizer;
pruning; carrying out one-time artificial pruning on the eucalyptus dunnii in 10 months after forestation, wherein the pruning strength is to be maintained to a tree trunk 1/2;
(3) tending management: forest stand tending management is performed according to the Dunn Eucalyptus dunnii artificial forest cultivation technical regulation (DB45/T1378-2016) and the China fir fast-growing high-yield forest cultivation technical regulation (DB 45/T470-2015).
2. The method for building the mixed forest of south mountain dunn eucalyptus dunnii and fir according to claim 1, wherein: the Chinese fir bare-rooted seedlings and the Dengen eucalyptus container seedlings are seedlings which are free of diseases, insect pests and mechanical damage, high in lignification degree and developed in root systems and are obtained through conventional container seedling cultivation; watering the seedlings thoroughly before lifting, properly trimming the seedlings during lifting, reserving 3-4 leaves, trimming 1/2 at the tail end of the reserved leaves, and reducing water evaporation; the seedlings are planted along with the seeds.
3. The method for building the mixed forest of south mountain dunn eucalyptus dunnii and fir according to claim 1, wherein: 1000kg of the base fertilizer in the step (1) comprises: 116kg of urea containing N46% and P2O5350kg of 20 percent calcium magnesium phosphate fertilizer containing N10 percent and P2O542% NH4H2PO4167kg, containing K2KCl83kg with the content of O60%, borax 10kg with the content of B11%, ZnSO with the content of Zn24%4·7H2O4kg, CuSO containing Cu25%4·5H2O6kg, containing 129kg of tung bran with 70% of organic matters, and the balance of filling materials; 1000kg of fertilizer used for the three additional manuring before the step (2) comprises: 301kg of urea containing 46.5% of N and P2O5450kg of 20 percent calcium magnesium phosphate fertilizer containing K2O63% of KCl159kg, 10kg of borax containing B11%, and ZnSO containing Zn24%4·7H2O8kg, CuSO containing Cu25%4·5H2O8kg, and the balance water; 1000kg of fertilizer used for the two topdressing after the step (2) comprises: 223kg of urea containing 46.5% of N and P2O5200kg of 20 percent calcium magnesium phosphate fertilizer containing 12 percent of N and P2O544% NH4H2PO4136kg, containing K2KCl206kg with O63%, borax 10kg with B11%, ZnSO with Zn24%4·7H2O8kg, CuSO containing Cu25%4·5H2O8kg, and the balance moisture.
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Cited By (2)
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CN113728861A (en) * | 2021-09-03 | 2021-12-03 | 广西壮族自治区林业科学研究院 | Eucalyptus mixed forest transformation method taking water source conservation function as leading factor |
CN113854020A (en) * | 2021-09-03 | 2021-12-31 | 广西壮族自治区林业科学研究院 | Method for transforming artificial pure eucalyptus forest of south Asia tropical eucalyptus to eucalyptus wide heterogeneous mixed forest |
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CN113728861B (en) * | 2021-09-03 | 2023-01-03 | 广西壮族自治区林业科学研究院 | Eucalyptus mixed forest transformation method taking water source conservation function as leading factor |
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