CN101965788A - Method for improving survival rate of haloxylon seedlings - Google Patents
Method for improving survival rate of haloxylon seedlings Download PDFInfo
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Abstract
The invention relates to a method for improving the survival rate of haloxylon seedlings, which belongs to the field of forestry ecological plant, is specifically used for protecting haloxylon seedlings by using a protective net cover in a process of massively restoring and building a haloxylon forest in a desert or semi-desert region, obviously improves the survival rate of the haloxylon seedlings and prevents the phenomenon of 'summer dormancy' of the haloxylon seedlings. The protective net cover is divided into two types, namely a directly sown seedling or naturally growing seedling protective net cover and a transplanted seedling protective net cover. By the method, the haloxylon seedlings can be effectively prevented from being harmed or threatened by the supracrustal high temperature, blown sand, animals and the like, supracrustal water evaporation can be locally reduced and vegetation coverage can be increased, so that the survival rate of the haloxylon seedlings is improved by over 30 percent. The operability is strong; the efficiency is high; and the method is simple and has very important significance for massively restoring and building the haloxylon forests in desert or semi-desert regions in drought regions of China, even African-Asian mainland.
Description
Technical field
The present invention relates generally to a kind of method that improves Haloxylon plant seedlings survival rate; belong to forestry ecology, cultivation field; be exclusively used in the implementation process of extensive recovery of desert and half-desert area and construction Haloxylon plant woods, significantly improve Haloxylon plant seedlings survival rate and prevent its generation " summer dormancy " phenomenon.
Background technology
Li Ke (Chenopodiaceae) Haloxylon plant, the whole world has 11 kinds, mainly is distributed in the vast desert area of Mediterranean to the Central Asia, is grown on active dune, semifixed dune, saline soil and the gravel matter Gobi desert.In state-owned sacsaoul (
Haloxylon ammodendorn(C.A.Me.) Bunge claims sacsaoul bavin or black sacsaoul again) and haloxylon persicum (
Haloxylon persicumBunge ex Boiss et Bushse) two kind.The Haloxylon plant is about 1139.3 * 10 at the distribution area of China
4Hm
2, account for 9% of China's desert gross area.Sacsaoul mainly is distributed in desert and the half-desert area that economize in Xinjiang, the Inner Mongol, Qinghai, Gansu and Ningxia of NORTHWEST CHINA portion etc., and haloxylon persicum only is distributed in the north, Xinjiang.The Haloxylon stress resistance of plant is extremely strong, belongs to the living halophytes of strong drought, and ecological ampliture is wider, is that a kind of drought-resistant, high temperature resistant, salt tolerant alkali, the good of weatherproof are checked winds and fixed drifting sand and the ecological protection plant.In addition, the Haloxylon plant is wooden hard, and firepower is strong, also is good fire wood, and the reputation of " desert coal alive " is arranged; Its current-year branch is rich in nutrition, is good animal feeding-stuff, and still the host of " desert genseng "-saline cistanche has very high economy and exploitation value.The Haloxylon plant is a NORTHWEST CHINA desert half-desert area rare plants resource, also be the seeds of China arid desert district dune fixation afforestation area maximum, at these regional preventing and fixing sands, slow down desertification, safeguard to have irreplaceable ecologic niche and important value on the ecological safety.Yet because of human factor and environmental deterioration, the Haloxylon plant resources once was subjected to heavy damage, once had been in Critical Condition, was listed in national three-level protective plant in imminent danger.So, accelerate recovery of Haloxylon plant woods and the important topic that construction work becomes the NORTHWEST CHINA ecological construction day by day.
Yet, solve Haloxylon plant forest land recover with construction fast naturally the time but face a lot of difficulties, one of them extremely key issue be that the live seedling of Haloxylon plant, natural seedling and transplanted seedling field survival rate are extremely low.The investigation of a large amount of Haloxylon plant Proterozoics shows: Haloxylon plant seedlings survival rate only is 0.97%, i.e. annual spring and emerge summer naturally, the seedling mortality of by artificial seeding and transplanting.Past people thinks that the main cause that causes this phenomenon is that the gentle arid of the exceedingly odious factor height of Haloxylon plant Proterozoic (gas) causes death seedling, comprises in addition that dust storm is buried with animal to gnaw.But show according to forefathers and our Investigational result in recent years: most of Haloxylon plant Proterozoic desert environment is serious water shortage not, even if the mid-June of extreme drought to late August, the following sandy soil layer of 60cm still contains more rich outstanding wet water.The Haloxylon plant generally sprouts in mid-March to mid-April, because spring, sleet was more, so the shallow-layer sandy soil are moisture abundant, the seedlings root growth is exceedingly fast, and root length generally can surpass 60cm to the mid-June; Because the outstanding wet water content of sandy soil layer is abundant, still can satisfy the water requirement of its seedling normal growth after mid-June, therefore, arid is not the main cause that causes the mortality of Haloxylon plant seedlings.High (gas) temperature neither the mortality of Haloxylon plant seedlings main cause, our experimental study shows, under the normal water supply situation, even if seedling be in 50 ℃ hot environment for a long time still can normal growth.In addition, dust storm is buried to gnaw with animal the part seedling is caused death, but can not cause the seedling mortality, and the Haloxylon plant has extremely strong desertification and buries regeneration capacity.And our current research result shows: (〉=50 ℃ of surface layer (0～2 cm) high temperature, mean temperature) be the key factor that causes the mortality of Haloxylon plant seedlings, surface layer (0～5 cm) high temperature (〉=55 ℃) also is to cause the Haloxylon plant to produce the key factor of " summer dormancy " phenomenon.At the Haloxylon plant seedlings, here the common thickness of surface layer of indication be 0～2 cm, the skin temperature of this soil horizon (referring to mean temperature) and the temperature contrast of 2 cm depths are less, but very easily are subjected to the influence of sunlight and temperature and change, and 〉=50 ℃ thermal extremes very easily occurs.The desert in NORTHWEST CHINA area and innerland, half-desert desert ecotope spring and summer are very abominable, and the surface layer temperature can reach more than 60 ℃ often, and skin temperature can reach about 80 ℃ terrifically.Innerland, Gu Erbantonggute desert, the accurate Ge Er in Xinjiang basin for example, 24～28 ℃ intense light irradiation weather occurs through regular meeting spring (the particularly early and middle ten days in April), and this moment, the surface layer temperature can reach more than 50 ℃; The arid in 6～August in summer is short of rain, the temperature height, and the surface layer temperature is higher, and daytime temperature surpasses 40 ℃ often, and the surface layer temperature can reach about 75 ℃.Surface layer high temperature often makes plant come to harm and coerces, the induction position of coercing is just at position that the plant stem foot contacts with surface layer, significant physiological reaction takes place owing to being subjected to the surface layer high temperature stress in plant, the lighter's poor growth or stagnation, and weight person directly causes its whole strain death.Though desert plant such as sacsaoul and haloxylon persicum have very strong adverse-resistant characteristic, but its seedling is difficult to coercing of the long period surface layer high temperature of tolerance more than 50 ℃, this reason makes in innerland, Gu Erbantonggute desert, Xinjiang Haloxylon natural plant seedling, live seedling and transplanted seedling survival rate very low just, not only making this zone is the very difficult nature recovery in the destroyed back of group of advantage with the Haloxylon plant, and also feasible afforestation is difficulty very.In addition, surface layer high temperature can cause that also " summer dormancy " phenomenon takes place often for seedling (below 5 years), treelet (5～10 years) and the bearing tree (more than 10 years) of Haloxylon plant, cause its growth to slow down or stagnate, thereby shortened a year effective vegetative period, year increment reduces.There is a precedent can prove absolutely that surface layer high temperature is the key factor that causes the death of Haloxylon plant seedlings: only several years ago; Altay Prefecture, Xinjiang county State Forestry Administration, P.R. China once adopted mode such as live, transplanting to plant 3000 mu of sacsaouls and haloxylon persicum around the innerland, OK a karaoke club wheat Li Shan nature reserve in its area under one's jurisdiction public welfare forest is managed and protected the station, and this place is habitat, innerland, typical Gu Erbantonggute desert.For improving sacsaoul and haloxylon persicum seedling percent, they take under the root intubate measures such as (a year twice), careless grid sand prevention of pouring water, sacsaoul and haloxylon persicum seedling are not avoided the protection of surface layer high temperature stress only, 3000 mu of sacsaouls and haloxylon persicum seedling are almost all dead after 2 years.The explanation of above example if large tracts of land is recovered and construction Haloxylon plant ecological woods in the desert in NORTHWEST CHINA area and half-desert desert ecological environment, at first will overcome the Haloxylon plant seedlings and avoid surface layer high temperature stress this crucial neck bottle difficult problem that causes death.
Cause that the extreme main cause that raises of desert and half-desert surface layer temperature is the high light direct projection high-temperature condition under, the high light that shines directly into the face of land is carried out covering to a certain degree, can prevent that the surface layer temperature from extremely raising so need only.We studies show that: a protection net is installed on the Haloxylon axis base portion and the face of land on every side thereof can be reached and prevent that the surface layer temperature from extremely raising and make plant itself avoid the effect of surface layer high temperature stress.Protection net mainly is made of sunshade wire side, skeleton and anchorage pawl three parts, is the cone shape that top is little, the bottom is big.The face of cone promptly is the sunshade wire side, is used to cover high light; Skeleton is made by 8～10# crude iron silk, is used to support the sunshade wire side and makes it keep cone shape; The anchorage pawl be connected 3～4 of skeleton bottom vertically downward the crude iron silk (8～10#) or the fine steel rib of 5～8#, can insert protection net is fixed on the face of land, prevent wind and be shifted.The diameter proportion of protective cover top disc and bottom disc is advisable with 1:2～3, and the top and the bottom disc becomes to connect shape without the capping of sunshade net.Protection net generally is divided into two types and specification, a kind of is the little guard that is used to protect live seedling of Haloxylon plant or natural seedling, upper diameter 10～25 cm, lower diameter 25～50 cm, highly be no less than 15cm, use sunshade rate is 50%～75% sunshade net; Another kind is the big guard that is used to protect transplanted seedling, upper diameter 15～25 cm, and lower diameter 35～50 cm, it highly generally is no more than 40cm, and use sunshade rate is 75%～95% sunshade net.The length of anchorage pawl (10～40 cm) should be decided according to the dust storm size degree that makes land used.The local pin that dust storm is big should be grown, and the ground that dust storm is little can be lacked.Protection net can not only be used to improve the seedling percent of Haloxylon plant, also can be used for preventing the generation of " summer dormancy " phenomenon of Haloxylon plant, thereby can increase its year increment, promotes growth, accelerates Haloxylon plant forest land and recovers and construction.Use for protection net can not limit plant and soil matrix type, the ecological forest of every need various vegetation types of construction on the frequent soil matrix that takes place of surface layer (0～2 cm) high temperature (〉=50 ℃) all can use such protection net to protect, to improve seedling percent.
Summary of the invention
Technical problemThe object of the present invention is to provide a kind of method that significantly improves desert and the live seedling of half-desert area Haloxylon plant, natural seedling and transplanted seedling survival rate; solve extensive recover and construction Haloxylon plant woods process in the seedling percent that causes because of the frequent high temperature of top layer terrifically that takes place low, and the individual growth that causes because of generation " summer dormancy " phenomenon often slowly waits a crucial difficult problem.
Technical scheme:Embodiment of the present invention are as follows:
(1) vegetable material: Haloxylon plant seed and 2～3 years living seedling.
(2) the enforcement time: Haloxylon plant seed and seedling are implemented the protection net protection simultaneously in the sowing in April and the transplanting in November to the next year of early winter then; Give birth to natural seedling then at the Haloxylon plant and implement the protection net protection in 3～April.
(3) structure of protection net, type and specification: protection net mainly is made of sunshade wire side, skeleton and anchorage pawl, is the cone shape that top is little, the bottom is big, and the diameter proportion of top disc and bottom disc is advisable with 1:2～3.The skeleton of guard and anchorage pawl are made with 8～10# crude iron silk (the anchorage pawl is the fine steel rib of available 5～8# also), the sunshade net is sewn to promptly makes protection net on the skeleton, and guard top and the bottom disc becomes the up/down perforation shape without the capping of sunshade net.Protection net can be divided into two types of live seedling or natural seedling protection net and transplanted seedling protection nets according to purpose.Live seedling protection net upper diameter 10～25 cm, lower diameter 25～50 cm highly are no less than 15cm, and use sunshade rate is 50%～75% sunshade net; Transplanted seedling protection net upper diameter 15～25 cm, lower diameter 35～50 cm highly generally are no more than 40cm, and use sunshade rate is 75%～95% sunshade net.The length of anchorage pawl (10～40 cm) should be decided according to the dust storm size degree that makes land used.The local pin that dust storm is big should be grown, and the ground that dust storm is little can be lacked.The making of protection net should be determined its concrete specification size according to the size of the topography and geomorphology of its application site, dust storm size, seedling etc.
(4) implement the ground habitat conditions: it is comparatively harsh to implement regional habitat, and the warm high light weather of height in spring (gas) happens occasionally, and height in summer (gas) temperature, dust storm and arid weather take place frequently, and surface layer (0～2 cm) high temperature that causes surpassing 50 ℃ frequently takes place.
(5) implementation method: during the sowing of Haloxylon plant seed, anchorage pawl with live seedling protection net inserts in the soil earlier, protection net is tightly fixed on the ground, then seed is sowed on the soil at the middle part in guard or the snow face and suitably earthing or not earthing.When the Haloxylon plant seedlings is transplanted, with the ground leveling, the Haloxylon plant seedlings is implanted in the soil earlier, then the transplanted seedling protection net is carefully entangled seedling from the top down, and further get final product with the insertion of anchorage pawl or in placing into the soil.Give birth to natural seedling then at the Haloxylon plant, in the middle of can directly it being enclosed within, and insert in the soil anchorage pawl of protection net tightly fixing with protection net.When fixed blade guard, should note making the bottom of protective cover closely to contact tight with ground as far as possible.
(6) maintenance management: the seedling of tree seedling, natural seedling or transplanting need use protection net to carry out continuous 1～3 year then, the protection in 5 years at the most, during to fill the gaps with seedlings in sowing in time in spring or transplanting to the seedling of death.Protection net is normal damaged owing to expose to the weather, and needs to carry out suitable repairing to it for this reason every year and safeguards.
Beneficial effect:The present invention is to cause the extremely low and seedling (below 5 years) of Haloxylon plant seedlings survival rate, treelet (5～10 years) and bearing tree (more than 10 years) to produce the newest research results of the key factor of " summer dormancy " phenomenon according to surface layer high temperature in desert and the half-desert habitat; be deployed in and significantly improve Haloxylon plant seedlings survival rate under the extreme adverse environmental factor of desert; prevent the establishment of its generation " summer dormancy " phenomenon method, set up the extensive key technology method of recovering and building Haloxylon plant woods in NORTHWEST CHINA portion desert and the harsh habitat of half-desert.Its beneficial effect is:
(1) the present invention uses the live seedling of protection net protection Haloxylon plant simple in structure, natural seedling and transplanted seedling to exempt from the harm of surface layer high temperature; significantly improve seedling percent (can reach more than 30%); solve the extremely low critical bottleneck problem of seedling percent that all the time in the harsh habitat of desert, is run in recovery of Haloxylon plant woods and the construction process; provide strong technical support in desert and half-desert habitat, carrying out extensive recovery of Haloxylon plant woods and construction work, have good application prospects.
(2) protection net used in the present invention has the effect of anti-dust storm concurrently, and the live seedling of Haloxylon plant, natural seedling can significantly reduce by dust storm under its protection and blow the probability that moves, buries.Protection net also can effectively stop desert small animal gnawing these seedling.In addition, because the surface layer temperature in the sunshade guard is relatively low, water evaporates dissipates slower, and the early growth that can be seedling provides comparatively suitable subenvironment, can promote the vegetation coverage of seedling basal part of stem peripheral ground simultaneously.These characteristics all can further improve Haloxylon plant seedlings survival rate.
(3) protection net can prevent effectively that also seedling (below 5 years), treelet (5～10 years) and the bearing tree (more than 10 years) of Haloxylon plant from " summer dormancy " phenomenon taking place, thereby can significantly increase effective vegetative period in Haloxylon plant year, increase year increment, accelerate individual growth, promote fast quick-recovery and the reconstruction of desert, half-desert Haloxylon plant woods, have good application prospects.
(4) the present invention also can further extend the scope of use; so long as, all can use protection net or relevant technical measures to carry out corresponding protection and use because a certain plant with certain ecology and economic worth that surface layer high temperature causes can not and distribute in somewhere existence.
(5) protection net used in the present invention make simple, with low cost, be convenient to operation, be suitable for large tracts of land and promote.
Description of drawings
Fig. 1 shows live seedling of Haloxylon plant or natural seedling protection net
Fig. 2 shows Haloxylon plant transplantation seedling protection net
Fig. 3 shows that live seedling or natural seedling protection net improve the application of sacsaoul seedling percent in the habitat, desert
Fig. 4 shows that the transplanted seedling protection net improves the application of sacsaoul seedling percent in the habitat, desert.
Embodiment
Survive Haloxylon plant woods in NORTHWEST CHINA desert and half-desert area at preventing and fixing sand, slow down desertification and safeguard and have irreplaceable important value on the ecological safety.Yet because the desert living environment is extremely harsh, the recovery of Haloxylon plant forest plantation and build extremely difficult, main bottleneck problem is that the live seedling of Haloxylon plant, natural seedling and transplanted seedling survival rate are extremely low, and general live seedling, natural seedling and transplanting seedling percent then only is 0.97%.Our current research shows; top layer terrifically in desert and the half-desert habitat (0～2 cm) high temperature stress is the key factor that causes the mortality of Haloxylon plant seedlings; we propose to use the method for protection net to come the Haloxylon plant seedlings is carried out corresponding protection for this reason, prevent its generation " summer dormancy " phenomenon thereby significantly improve its survival rate and have concurrently.
Concrete determine that the technology of the present invention will be used in a certain Desert Area or plot before, at first to carefully investigate the ecotope on this ground, fully understand this area or plot at spring and hot summer easy top layer, spot high temperature (〉=50 ℃) whether.If there is not surface layer high temperature in this desert district, just may there is no need to use protection net to protect accordingly.In addition, also will understand the following sandy soil layer of the 60cm of this area and whether have more rich outstanding wet water between the 6～August in summer, if moisture is lower, Haloxylon plant seedlings survival rate will significantly reduce.If the moisture situation is had little understanding, can use first the experiment afterwards of the present invention and promote.
The making of protection net is comparatively simple, but at first should be according to its different application targets, size of the topography and geomorphology of application site, dust storm size, seedling etc. and determine its concrete specification size (material, size and specification are seen technical scheme).
Will select time of suiting when using the live seedling of protection net protection Haloxylon plant, natural seedling or transplanted seedling, generally carry out the November or mid-March in next year to the mid-April in every year, the soil moisture content in the desert environment is higher at this moment, and seedling survives easily.When protection net was used on the spot in the scene, the using method of two kinds of guards was slightly different.When live seedling protection net uses, earlier with the leveling of soil face, in then the anchorage claw portion of guard being inserted or placing into the soil, at last sacsaoul or H. persicum seeds are broadcasted sowing on the soil of guard or snow face and a small amount of earthing or not earthing promptly finish sowing.Give birth to natural seedling then at the Haloxylon plant, in the middle of can directly it being enclosed within, and insert in the soil anchorage pawl of protection net tightly fixing with protection net.When the transplanted seedling protection net uses, with the soil surface leveling, the Haloxylon plant seedlings is implanted in the soil earlier, then guard is carefully entangled seedling from the top down, and further promptly finish transplanting work with the insertion of anchorage pawl or in placing into the soil.When fixed blade guard, should note making the bottom of protective cover closely to contact tight with ground as far as possible.
Protection net need continue 1～3 year to the protection of Haloxylon plant seedlings, at the most the protection in 5 years.So annual the need be carried out corresponding maintenance management to protection net and seedling thereof, mainly comprise the nursery stock of death is sowed or transplants and fill the gaps with seedlings, the sunshade net of breakage is carried out repair maintenance etc.
Embodiment:
In desert and half-desert environment, use the method for the live seedling of protection net raising Haloxylon plant, natural seedling and transplanted seedling survival rate as follows:
(1) implement the place: stock ground, desert, OK a karaoke club wheat Li Shan nature reserve, accurate Ge Er basin, Xinjiang, this region is the harshest desert habitat;
(2) implement scale: the live seedling of 200 strain sacsaouls, the natural seedling of 200 strains and 2 years above sacsaoul transplanted seedlings of life of 200 strains;
(3) the enforcement time: on March 25th, 2009;
(4) structure of protection net, type and specification: protection net mainly is made of sunshade wire side, skeleton and anchorage pawl, is the cone shape that top is little, the bottom is big, and the diameter proportion of top disc and bottom disc is advisable with 1:2～3.The skeleton of guard and anchorage pawl be with making with 8～10# crude iron silk (the anchorage pawl is the fine steel rib of available 5～8# also), the sunshade net is sewn to promptly makes protection net on the skeleton, and guard top and the bottom disc becomes the up/down perforation shape without the capping of sunshade net.Protection net can be divided into two types of live seedling or natural seedling protection net and transplanted seedling protection nets according to purpose.Live seedling protection net upper diameter 10～25 cm, lower diameter 25～50 cm highly are no less than 15cm, and use sunshade rate is 50%～75% sunshade net; Transplanted seedling protection net upper diameter 15～25 cm, lower diameter 35～50 cm highly generally are no more than 40cm, and use sunshade rate is 75%～95% sunshade net.The length of anchorage pawl (10～40 cm) should be decided according to the dust storm size degree that makes land used.
(5) implementation method: during the sowing of Haloxylon plant seed, anchorage pawl with live seedling protection net inserts in the soil earlier, protection net is tightly fixed on the ground, then seed is sowed on the soil at the middle part in guard or the snow face and suitably earthing or not earthing.When the Haloxylon plant seedlings is transplanted, with the ground leveling, the Haloxylon plant seedlings is implanted in the soil earlier, then the transplanted seedling protection net is carefully entangled seedling from the top down, and further get final product with the insertion of anchorage pawl or in placing into the soil.Give birth to natural seedling then at the Haloxylon plant, in the middle of can directly it being enclosed within, and insert in the soil anchorage pawl of protection net tightly fixing with protection net.When fixed blade guard, should note making the bottom of protective cover closely to contact tight with ground as far as possible.
(6) maintenance management: the seedling of tree seedling, natural seedling or transplanting need use protection net to carry out continuous 1～3 year then, the protection in 5 years at the most, during to fill the gaps with seedlings in sowing in time in spring or transplanting to the seedling of death; Protection net is normal damaged owing to expose to the weather, and needs to carry out suitable repairing to it for this reason every year and safeguards.
(7) effect: the test in extremely harsh habitat, innerland, desert in the OK a karaoke club wheat that the live seedling of sacsaoul, natural seedling and transplanted seedling that above technical method is handled have experienced 2 years, investigation statistics finds that 40% seedling survival is on average arranged at the beginning of 2009 10 months, in mid-October, 2010 investigation finds that 30% seedling survival is on average arranged, and seedling percent significantly improves.Have 10% to be buried by dust storm or small animal is gnawed deadly in the dead seedling approximately.And the contrast that does not have protection net to protect, the sacsaoul seedling is almost all dead.
Claims (2)
1. one kind is improved Haloxylon plant seedlings survival rate, and prevents the method for its generation " summer dormancy " phenomenon, comprising:
(1) vegetable material: Haloxylon plant seed or 2～3 years living seedling;
(2) the enforcement time: Haloxylon plant seed and seedling are implemented the protection net protection simultaneously in the sowing in April and the transplanting in November to the next year of early winter then; Give birth to natural seedling then at the Haloxylon plant and implement the protection net protection in 3～April;
(3) structure of protection net, type and specification: protection net is mainly by the sunshade wire side, skeleton and anchorage pawl constitute, it is little to be top, the cone shape that the bottom is big, the diameter proportion of top disc and bottom disc is advisable with 1:2～3, the skeleton of guard and anchorage pawl are made with 8～10# crude iron silk, the anchorage pawl also fine steel rib of available 5～8# is made, the sunshade net is sewn to promptly can be made into protection net on the skeleton, guard top and the bottom disc is without the capping of sunshade net, become the up/down perforation shape, live seedling or natural seedling protection net upper diameter 10～25cm, lower diameter 25～50cm highly is no less than 15cm, and use sunshade rate is 50%～75% sunshade net; Transplanted seedling protection net upper diameter 15～25cm, lower diameter 35～50cm highly is no more than 40cm, and use sunshade rate is 75%～95% sunshade net; Long 10～the 40cm of anchorage pawl, concrete foundation makes the dust storm size degree of land used and decides: the local pin that dust storm is big should be grown, the ground that dust storm is little can be lacked, and the making of protection net should be determined its concrete specification size according to the size of the topography and geomorphology of its application site, dust storm size, seedling etc.;
(4) implement the ground habitat conditions: it is comparatively harsh to implement regional habitat, and spring, high temperature high light weather happened occasionally, and summer high temperature, dust storm and arid weather take place frequently, and 0～2 cm surface layer high temperature that causes surpassing 50 ℃ frequently takes place;
(5) implementation method: during the sowing of Haloxylon plant seed, anchorage pawl with live seedling protection net inserts in the soil earlier, protection net is tightly fixed on the ground, then seed is sowed on the soil or snow face at middle part in guard, and earthing or not earthing on a small quantity; When the Haloxylon plant seedlings is transplanted, with the ground leveling, the Haloxylon plant seedlings is implanted in the soil earlier, then the transplanted seedling protection net is carefully entangled seedling from the top down, and further get final product with the insertion of anchorage pawl or in placing into the soil; Give birth to natural seedling then at the Haloxylon plant, in the middle of directly it being enclosed within protection net, and tightly fixing in the anchorage pawl insertion soil with protection net, when fixed blade guard, should note making the bottom of protective cover closely to contact tight with ground as far as possible;
(6) maintenance management: the seedling of tree seedling, natural seedling or transplanting need use protection net to carry out continuous 1～3 year then, the protection in 5 years at the most, during to fill the gaps with seedlings in sowing in time in spring or transplanting to the seedling of death; Protection net is normal damaged owing to expose to the weather, and needs to carry out suitable repairing to it for this reason every year and safeguards.
2. the application of the described method of claim 1 in the higher place afforestation of surface layer temperature such as wasteland, loess plateau.
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| Publication number | Priority date | Publication date | Assignee | Title |
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