A method for cultivating saline-alkali soil Apocynum venetum field combined with natural community restoration

Abstract

The present invention relates to a method for cultivating apocynum venetum in saline-alkali soil combined with natural community restoration. The method, based on the growth characteristics of taproot and transverse rooting, induces new plants with upright rhizomes through seedling digging, trenching, organic material landfilling, and sub-film drip irrigation in natural distribution zones. The method also induces transverse rhizomes to grow toward water and fertilizer in degraded patches and bare land, restoring vegetation coverage in a radial pattern from high to low according to the terrain. Wild apocynum venetum plants are introduced and thinned in saline-alkali soil, and double-layer sub-film drip irrigation is adopted to desalinate the root zone, providing conditions for warming, weeding, preventing rhizome cross-growth, controlling density, and reducing diseases. Fertilizer is accumulated between the films, laying a material foundation for reducing salt, improving soil quality, providing an organic fertilizer source, and ensuring product quality, thereby establishing stable apocynum venetum fields. The combination of these two measures enables the sustainable development of apocynum venetum resources in arid saline-alkali regions, solving the problems of wild apocynum venetum resource degradation and raw material shortages.

Description

Technical Field

[0001] The present invention belongs to the field of development and utilization of saline soil resources in arid areas, and relates to a method for cultivating saline-alkali soil Apocynum venetum fields combined with natural community restoration. The method expands Apocynum venetum resources by combining artificial cultivation with natural vegetation restoration, and continuously provides raw materials for industrialization. Background Art

[0002] Apocynum venetum is a perennial herbaceous plant, an economic halophyte native to the desert steppes of the Tarim Basin. It thrives in sandy soils with topsoil salinity levels of 1%-10%. Its taproot, which penetrates deep into the groundwater to absorb water with lower salinity, typically produces lateral roots 50-70 cm below the surface, growing horizontally. Adventitious buds on these lateral roots grow upward, forming rhizomes 15-25 cm above the surface. Buds on these rhizomes then grow upward, forming the hemp plant. Adventitious buds on these lateral roots grow downward, becoming the taproot. This bud then takes on the function of the taproot when the original taproot rots and dies. While mature plants typically germinate in early spring, under adequate water conditions, adventitious buds on these horizontal roots can produce new individuals throughout the growing season. This plant, through continuous renewal through horizontal rhizomes, propagates its cluster or community by regenerating new plants as old plants die. Dead branches from previous years remain, while new branches sprout and grow within the dead branches, forming a clump-like formation that protects against wind and sand, and conserves soil and water. The whole plant can be used as medicine. In addition to being a raw material for textiles and papermaking, it can also be used to make tea, be used as medicine, a source of nectar, and to extract active ingredients to develop medicines.

[0003] Developing apocynum venetum resources in salinized areas, where other plants struggle to survive, holds significant economic and ecological value. Due to excessive cultivation and reckless, predatory harvesting, over 60% of wild apocynum venetum pastures have become patchy and alkalized, forcing it to be designated a prohibited species for harvesting. This, coupled with a lack of buyers and a reluctance to cultivate it, has led to a current shortage of apocynum venetum raw material. Based on a review of its biological characteristics and appropriate agronomic practices, the research team, guided by native habitat restoration, is implementing a combined approach of wild hemp regeneration and sustainable hemp cultivation to ensure the sustainable development of the resource. Summary of the Invention

[0004] The present invention aims to provide a method for cultivating Apocynum venetum fields in saline-alkali soils combined with natural community restoration. This method, based on the characteristics of Apocynum venetum's taproot and transverse root growth, involves digging seedlings, trenching, filling with organic materials, and applying drip irrigation under mulch to induce new plants with upright rhizomes. In degraded bare patches, transverse rhizomes are directed to grow toward water and fertilizer, restoring vegetation coverage through radiation. Wild Apocynum venetum plants are introduced and thinned out in saline-alkali soils, and drip irrigation under double-layer mulch is used to prevent rhizomes from growing in clusters, control density, and reduce disease. Compost is accumulated between mulch films, laying the material foundation for reducing salinity, improving soil quality, providing a source of organic fertilizer, and ensuring product quality, thereby establishing a sustainable Apocynum venetum field. The combination of these two measures enables the sustainable development of Apocynum venetum resources in arid saline-alkali regions, resolving the issues of wild resource degradation and raw material shortages.

[0005] The method for cultivating a saline-alkali soil Apocynum venetum field combined with natural community restoration according to the present invention is characterized by being carried out in the following steps:

[0006] Restoration of natural Apocynum venetum community vegetation:

[0007] a. Select the densely populated areas and patchy bare areas of the Apocynum venetum distribution zone with sandy or loamy soils and a groundwater level of 2-4 meters in the desert-oasis transition zone;

[0008] b. Build reservoirs in the Apocynum venetum distribution area in the desert-oasis transition zone to store ecological water or flood runoff during the fallow period;

[0009] c. In spring, before the underground adventitious buds germinate, dig the Apocynum venetum seedlings along the contour strips of the dense area in step a, with a root length of 18-25 cm, for field transplanting; dig the seedlings and dig furrows with a depth of 50 cm. After mechanical deep loosening, fill in 40 cm thick decomposed farmyard manure to achieve a smooth ditch, lay drip irrigation tape, cover with film, and the spacing of the drip irrigation tape under the film is 25 cm; then use fresh water from step b to intermittently wash the salt, and irrigate at a rate of 450-750 m 3 hm -2 ;

[0010] d. In the bare areas of the degraded patches in step a, remove the topsoil and dig trenches 50 cm deep, 1 meter apart, along the contour lines, from high to low. After mechanical deep loosening, fill the trenches with 40 cm of well-rotted farmyard manure until the trenches are level. Lay drip irrigation tape and cover with film. Water the trenches three times per year from April to June. Irrigate once a year with spring water for five years after vegetation cover is established, and then allow the trenches to grow naturally.

[0011] Cultivating sustainable mining of Apocynum sibiricum fields:

[0012] e. Select the vigorous Apocynum venetum plants dug in step c, tie them into bundles in the same direction with similar thickness, cover them with wet geotextiles and transport them to the edge of the planting field, dig pits for transplanting, cover them with sand, moisten them with water, then cover them with geotextiles, keep the geotextiles moist with water every day, and wait for transplanting;

[0013] F, select saline-alkali sand wasteland to be planned as the planting strip field of length 100m × width 50m, level, turn over and harrow, pick out reed root, rotary tillage and harrow after deep loosening; Mechanical ditching, furrow spacing 3m, furrow depth 20cm, in the furrow, every 1m digs planting pit, pit depth 25cm, every pit tilts 45 ° of 3 strains of the Apocynum venetum seedlings that step e is selected, plant 2 / 3 is buried, paved drip irrigation belt in the furrow, covered first layer of film, and the seedling top exposes first layer of film; Spreading organic fertilizer on the first layer of film is that block cow dung, sheep manure and the turf soil of volume ratio 1:1:1 mix and form, paved drip irrigation belt, paved second layer of film, and organic fertilizer thickness is higher than seedling top;

[0014] g. After planting in step f, intermittently irrigate the first layer of drip irrigation belt under the film to wash away the salt. The irrigation volume is 450-750m 3 hm -2 Plant the seedlings when the second film is on top of the buds. Irrigate once every 15 days after planting. The drip irrigation tape under the second film drips for 2 hours before drip irrigation under the first film. The amount of irrigation should be based on the amount of water needed to keep the edge of the first film moist. Apply water-soluble macronutrient fertilizers three times with drip irrigation from April to July. Apply water-soluble phosphorus, potassium, and silicon fertilizers once in late August to early September to promote the differentiation of underground root buds.

[0015] h. Regularly weed, remove diseased plants, observe and promptly control diseases; harvest leaves, flowers, seeds and hemp in the same year; remove dead branches and leaves from the hemp field to prevent diseases; maintain plant and row spacing, and cultivate sustainable exploitation of Apocynum venetum fields.

[0016] The present invention discloses a method for cultivating a saline-alkali soil Apocynum hemp field combined with natural community restoration. In this method, soil fertility is regularly improved and crop rotation measures are adopted to renew the artificial hemp field while the hemp field is being mined. Natural communities are protected by fencing under auxiliary restoration measures, while reasonable thinning and harvesting are carried out simultaneously. The two resources ensure the supply of industrial raw materials.

[0017] The method for cultivating saline-alkali soil Apocynum venetum fields combined with natural community restoration described in the present invention is characterized by:

[0018] Based on the biological characteristics of Apocynum venetum, the government has gone beyond simply banning logging. By combining seedling digging in strips, radially inducing new seedlings, and establishing mining fields, the government has addressed the sharp decline in wild seedlings, the degradation of natural vegetation, and the shortage of raw materials for artificial cultivation. Digging in strips, trenching, filling with organic materials, and drip irrigation under mulch can increase the number of new seedlings by 5-10 times per year. Based on the root system's chemotaxis toward water and fertilizer, trenches are dug and fertilizers are installed in degraded, bare land according to the terrain, and radially inducing vegetation growth is used to rapidly increase vegetation cover. Drip irrigation under double-layer mulch in the fields provides conditions for washing out salt and increasing temperature, preventing root and rhizome intergrowth, controlling density, and reducing disease. Composting between the mulch layers provides a material foundation for reducing salinity, improving soil quality, providing a source of organic fertilizer, and ensuring product quality. It also creates a dark environment, preventing new seedlings from intergrowth under the mulch, thus maintaining the original ventilation density and establishing sustainable mining fields. The combination of these two measures has enabled the sustainable development of Apocynum venetum resources in arid saline-alkali areas. In saline-alkali lands where other plants find it difficult to survive, economic benefits can be obtained and the ecological environment improved in the same year; this method is low-cost and easy to manage, and can achieve the effects of restoring wild resources, improving soil, preventing wind and sand, and continuously creating economic value. Implementation Method Example

[0019] The method of the present invention is implemented in the East Gobi of Yuli County:

[0020] Restoration of natural Apocynum venetum community vegetation:

[0021] a. Select the densely populated areas and patchy bare areas of the Apocynum venetum distribution area in the desert-oasis transition zone with a groundwater level of 3 meters in sandy soil;

[0022] b. Build reservoirs in the Apocynum venetum distribution area in the desert-oasis transition zone to store ecological water or flood runoff during the fallow period to assist in the renewal and recovery of the Apocynum venetum community;

[0023] c. In spring, before the underground adventitious buds germinate, dig the Apocynum venetum seedlings along the contour intervals of the dense area of ​​step a, with a root length of 25 cm, for field transplanting; dig the seedlings into trenches with a depth of 50 cm, fill them with 40 cm thick decomposed farmyard manure after mechanical deep loosening, and make the trenches smooth. Then, lay drip irrigation tapes and cover them with film, with a spacing of 25 cm between drip irrigation tapes under the film; then use fresh water from step b to intermittently wash the salt, and irrigate at a rate of 450m3. 3 hm -2 , inducing the residual taproots and lateral roots in the desalination zone to produce new shoots, assisting cluster renewal;

[0024] d. In the bare areas of patches of degraded vegetation in step a, remove the topsoil and dig trenches 50 cm deep, 1 meter apart, along the contour lines, from high to low. After mechanical deep loosening, fill the trenches with 40 cm of well-rotted farmyard manure to level them. Lay drip irrigation tape and cover with film. Water the trenches three times per year from April to June to induce new seedlings from the remaining taproots and lateral roots in the desalinated areas, thereby assisting with regeneration. Irrigate once a year with spring water for five years after vegetation cover is established, and then allow the soil to grow naturally.

[0025] Cultivating sustainable mining of Apocynum sibiricum fields:

[0026] e. Select the vigorous Apocynum venetum plants dug in step c, tie them into bundles in the same direction with similar thickness, cover them with wet geotextiles and transport them to the edge of the planting field, dig pits for transplanting, cover them with sand, moisten them with water, then cover them with geotextiles, keep the geotextiles moist with water every day, and wait for transplanting;

[0027] F, select saline-alkali sand wasteland to be planned as the planting strip field of length 100m × width 50m, level, turn over and harrow, pick out reed root, rotary tillage and harrow after deep loosening; Mechanical ditching, furrow spacing 3m, furrow depth 20cm, dig planting pits at intervals of 1m in the furrow, pit depth 25cm, 3 strains of the Apocynum venetum seedlings that every pit tilts 45 ° and plants step e is selected, plant 2 / 3 is buried in the soil, paved drip irrigation belt in the furrow, covered the first layer of film, and the seedling top exposes the first layer of film; Spreading organic fertilizer on the first layer of film is block cow dung, sheep manure and the peat soil mixture of volume ratio 1:1:1, paved drip irrigation belt, paved the second layer of film, and organic fertilizer thickness is higher than the seedling top;

[0028] g. After planting in step f, intermittently irrigate the first layer of drip irrigation belt under the film to wash away the salt. The irrigation volume is 450m 3 hm -2 Plant the seedlings when the second film is on top of the buds. Irrigate once every 15 days after planting. The drip irrigation tape under the second film drips for 2 hours before drip irrigation under the first film. The amount of irrigation should be based on the amount of water needed to keep the edge of the first film moist. Apply water-soluble macronutrient fertilizers three times with drip irrigation from April to July. Apply water-soluble phosphorus, potassium, and silicon fertilizers once in late August to early September to promote the differentiation of underground root buds.

[0029] h. Regularly weed, remove diseased plants, observe and promptly control diseases; harvest leaves, flowers, seeds and hemp in the same year; remove dead branches and leaves from the hemp field to prevent diseases; maintain plant and row spacing, and cultivate sustainable exploitation of Apocynum venetum fields.

[0030] While cultivating hemp fields, soil fertility is regularly improved and crop rotation measures are taken to renew the artificial hemp fields; natural communities are protected by fencing under auxiliary restoration measures, while reasonable thinning and harvesting are carried out at the same time; these two resources ensure the supply of raw materials for industrialization. Example

[0031] The method of the present invention was implemented in the 33rd Regiment of the Second Division of the Xinjiang Production and Construction Corps:

[0032] Restoration of natural Apocynum venetum community vegetation:

[0033] a. Select the densely populated areas and patchy bare areas of the Apocynum venetum distribution area in the desert-oasis transition zone with a groundwater level of 2 meters in loamy soil;

[0034] b. Build reservoirs in the Apocynum venetum distribution area in the desert-oasis transition zone to store ecological water or flood runoff during the fallow period to assist in the renewal and recovery of the Apocynum venetum community;

[0035] c. In spring, before the underground adventitious buds germinate, dig the Apocynum venetum seedlings along the contour strips of the dense area in step a, with a root length of 20 cm, for field transplanting; dig the seedlings and dig furrows with a depth of 50 cm. After mechanical deep loosening, fill in 40 cm thick decomposed farmyard manure to achieve a smooth ditch, lay drip irrigation tape, cover with film, and the spacing of the drip irrigation tape under the film is 25 cm; then use fresh water from step b to intermittently wash the salt, and irrigate with 600m 3 hm -2 , inducing the residual taproots and lateral roots in the desalination zone to produce new shoots, assisting cluster renewal;

[0036] d. In the bare land areas where the community degraded in step a, remove the surface saline soil and dig trenches along the contour lines from high to low, at intervals of 1 meter. The trenches are 50 cm deep. After mechanical deep loosening, fill with 40 cm thick decomposed farmyard manure to make the trenches level. Then lay drip irrigation tape and cover with film. Water the trenches three times from April to June each year to induce horizontal roots to move towards water and fertilizer. The radial water and fertilizer will induce the formation of Apocynum venetum clusters. Irrigate once a year with spring water for 5 years after the vegetation is covered, and then let it grow naturally.

[0037] Cultivating sustainable mining of Apocynum sibiricum fields:

[0038] e. Select the vigorous Apocynum venetum plants dug in step c, tie them into bundles in the same direction with similar thickness, cover them with wet geotextiles and transport them to the edge of the planting field, dig pits for transplanting, cover them with sand, moisten them with water, then cover them with geotextiles, keep the geotextiles moist with water every day, and wait for transplanting;

[0039] F, select saline-alkali sand wasteland to be planned as the planting strip field of length 100m × width 50m, level, turn over and harrow, pick out reed root, rotary tillage and harrow after deep loosening; Mechanical ditching, furrow spacing 3m, furrow depth 20cm, in the furrow, every 1m digs planting pit, pit depth 25cm, every pit tilts 45 ° of 3 strains of the Apocynum venetum seedlings that step e is selected, plant 2 / 3 is buried, paved drip irrigation belt in the furrow, covered first layer of film, and the seedling top exposes first layer of film; Spreading organic fertilizer on the first layer of film is that block cow dung, sheep manure and the turf soil of volume ratio 1:1:1 mix and form, paved drip irrigation belt, paved second layer of film, and organic fertilizer thickness is higher than seedling top;

[0040] g. After planting in step f, intermittently irrigate the first layer of drip irrigation belt under the film to wash away the salt. The irrigation volume is 600m 3 hm-2 Plant the seedlings when the second film is on top of the buds. Irrigate once every 15 days after planting. The drip irrigation tape under the second film drips for 2 hours before drip irrigation under the first film. The amount of irrigation should be based on the amount of water needed to keep the edge of the first film moist. Apply water-soluble macronutrient fertilizers three times with drip irrigation from April to July. Apply water-soluble phosphorus, potassium, and silicon fertilizers once in late August to early September to promote the differentiation of underground root buds.

[0041] h. Regularly weed, remove diseased plants, observe and promptly control diseases; harvest leaves, flowers, seeds and hemp in the same year; remove dead branches and leaves from the hemp field to prevent diseases; maintain plant and row spacing, and cultivate sustainable exploitation of Apocynum venetum fields.

[0042] While cultivating hemp fields, soil fertility is regularly improved and crop rotation measures are taken to renew the artificial hemp fields; natural communities are protected by fencing under auxiliary restoration measures, while reasonable thinning and harvesting are carried out at the same time; these two resources ensure the supply of raw materials for industrialization. Example

[0043] The method of the present invention was implemented in the 31st Regiment of the Second Division of the Xinjiang Production and Construction Corps:

[0044] Restoration of natural Apocynum venetum community vegetation:

[0045] a. Select the densely populated areas and patchy bare areas of the Apocynum venetum distribution area in the desert-oasis transition zone with a groundwater level of 4 meters in sandy soil;

[0046] b. Build reservoirs in the Apocynum venetum distribution area in the desert-oasis transition zone to store ecological water or flood runoff during the fallow period to assist in the renewal and recovery of the Apocynum venetum community;

[0047] c. In spring, before the underground adventitious buds germinate, dig the Apocynum venetum seedlings along the contour intervals of the dense area in step a, with a root length of 18 cm, for field transplanting; dig the seedlings and dig furrows with a depth of 50 cm. After mechanical deep loosening, fill in 40 cm thick decomposed farmyard manure to achieve a smooth ditch, lay drip irrigation tape, cover with film, and the spacing of the drip irrigation tape under the film is 25 cm; then use fresh water from step b to intermittently wash the salt, and irrigate with 750m 3 hm -2 , inducing the residual taproots and lateral roots in the desalination zone to produce new shoots, assisting cluster renewal;

[0048] d. In the bare land areas where the community degraded in step a, remove the surface saline soil and dig trenches along the contour lines from high to low, at intervals of 1 meter. The trenches are 50 cm deep. After mechanical deep loosening, fill with 40 cm thick decomposed farmyard manure to make the trenches level. Then lay drip irrigation tape and cover with film. Water the trenches three times from April to June each year to induce horizontal roots to move towards water and fertilizer. The radial water and fertilizer will induce the formation of Apocynum venetum clusters. Irrigate once a year with spring water for 5 years after the vegetation is covered, and then let it grow naturally.

[0049] Cultivating sustainable mining of Apocynum sibiricum fields:

[0050] e. Select the vigorous Apocynum venetum plants dug in step c, tie them into bundles in the same direction with similar thickness, cover them with wet geotextiles and transport them to the edge of the planting field, dig pits for transplanting, cover them with sand, moisten them with water, then cover them with geotextiles, keep the geotextiles moist with water every day, and wait for transplanting;

[0051] F, select saline-alkali sand wasteland to be planned as the planting strip field of length 100m × width 50m, level, turn over and harrow, pick out reed root, rotary tillage and harrow after deep loosening; Mechanical ditching, furrow spacing 3m, furrow depth 20cm, in the furrow, every 1m digs planting pit, pit depth 25cm, every pit tilts 45 ° of 3 strains of the Apocynum venetum seedlings that step e is selected, plant 2 / 3 is buried, paved drip irrigation belt in the furrow, covered first layer of film, and the seedling top exposes first layer of film; Spreading organic fertilizer on the first layer of film is that block cow dung, sheep manure and the turf soil of volume ratio 1:1:1 mix and form, paved drip irrigation belt, paved second layer of film, and organic fertilizer thickness is higher than seedling top;

[0052] g. After planting in step f, intermittently irrigate the first layer of drip irrigation belt under the film to wash away the salt. The irrigation volume is 750m 3 hm -2 Plant the seedlings when the second film is on top of the buds. Irrigate once every 15 days after planting. The drip irrigation tape under the second film drips for 2 hours before drip irrigation under the first film. The amount of irrigation should be based on the amount of water needed to keep the edge of the first film moist. Apply water-soluble macronutrient fertilizers three times with drip irrigation from April to July. Apply water-soluble phosphorus, potassium, and silicon fertilizers once in late August to early September to promote the differentiation of underground root buds.

[0053] h. Regularly weed, remove diseased plants, observe and promptly control diseases; harvest leaves, flowers, seeds and hemp in the same year; remove dead branches and leaves from the hemp field to prevent diseases; maintain plant and row spacing, and cultivate sustainable exploitation of Apocynum venetum fields.

[0054] While cultivating hemp fields, soil fertility is regularly improved and crop rotation measures are taken to renew the artificial hemp fields; natural communities are protected by fencing under auxiliary restoration measures, while reasonable thinning and harvesting are carried out at the same time; these two resources ensure the supply of raw materials for industrialization.

[0055] The method of combining saline-alkali soil Apocynum venetum field cultivation with natural community restoration described in the present invention, and natural Apocynum venetum community vegetation restoration and field transplanting trials conducted by this method in Yuli County and the 31st and 33rd Regiments of the Second Division of the Xinjiang Production and Construction Corps, respectively, showed that the number of new seedlings in the natural distribution area increased by 5-10 times, and the vegetation coverage increased by 70% in 3-5 years; the survival rate of field transplanted plants was over 95%, and flowers, leaves, seeds, and hemp were harvested in the same year, the products were pollution-free, and could generate economic benefits; the salt content of the soil in the root zone was reduced by 70%; the density was easy to control, and the plants were disease-free.

Claims

1. A method for cultivating saline-alkali soil Apocynum venetum fields combined with natural community restoration, characterized in that Follow these steps: Restoration of natural Apocynum venetum community vegetation: a. Select the densely populated areas and patchy bare areas of the Apocynum venetum distribution zone with sandy or loamy soils and a groundwater level of 2-4 meters in the desert-oasis transition zone; b. Build reservoirs in the Apocynum venetum distribution area in the desert-oasis transition zone to store ecological water or flood runoff during the fallow period; c. In spring, before the underground adventitious buds germinate, dig the Apocynum venetum seedlings along the contour strips of the dense area in step a, with a root length of 18-25 cm, for field transplanting; dig the seedlings and dig furrows with a depth of 50 cm. After mechanical deep loosening, fill in 40 cm thick decomposed farmyard manure to achieve a smooth ditch, lay drip irrigation tape, cover with film, and the spacing of the drip irrigation tape under the film is 25 cm; then use fresh water from step b to intermittently wash the salt, and irrigate at a rate of 450-750 m 3 hm -2 ; d. In the bare areas of the degraded patches in step a, remove the topsoil and dig trenches 50 cm deep, 1 meter apart, along the contour lines, from high to low. After mechanical deep loosening, fill the trenches with 40 cm of well-rotted farmyard manure until the trenches are level. Lay drip irrigation tape and cover with film. Water the trenches three times per year from April to June. Irrigate once a year with spring water for five years after vegetation cover is established, and then allow the trenches to grow naturally. Cultivating sustainable mining of Apocynum sibiricum fields: e. Select the vigorous Apocynum venetum seedlings dug in step c, tie them into bundles in the same direction according to similar coarseness, cover them with wet geotextiles and transport them to the edge of the planting field, dig holes for transplanting, cover them with sand and water them, then cover them with geotextiles, keep the geotextiles moist every day, and wait for transplanting; F, select saline-alkali sand wasteland to be planned as the planting strip field of length 100m × width 50m, level, turn over and harrow, pick out reed root, rotary tillage and harrow after deep loosening; Mechanical ditching, furrow spacing 3m, furrow depth 20cm, dig planting pits at intervals of 1m in the furrow, pit depth 25cm, 3 strains of the Apocynum venetum seedlings that every pit tilts 45 ° of planting step e is selected, plant 2 / 3 is buried, paved drip irrigation belt in the furrow, covered first layer of film, and the seedling top exposes first layer of film; Spread the organic fertilizer that the block cow dung, sheep manure and peat soil of volume ratio 1:1:1 are mixed and formed on the first layer of film, paved drip irrigation belt, paved second layer of film, and organic fertilizer thickness is higher than seedling top; g. After planting in step f, intermittently irrigate the first layer of drip irrigation belt under the film to wash away the salt. The irrigation volume is 450-750m 3 hm -2 Plant the seedlings when the second film is on top of the buds. Irrigate once every 15 days after planting. The drip irrigation tape under the second film drips for 2 hours before drip irrigation under the first film. The amount of irrigation should be based on the amount of water needed to keep the edge of the first film moist. Apply water-soluble macronutrient fertilizers three times with drip irrigation from April to July. Apply water-soluble phosphorus, potassium, and silicon fertilizers once in late August to early September to promote the differentiation of underground root buds. h. Regularly weed, remove diseased plants, observe and promptly control diseases; harvest leaves, flowers, seeds and hemp in the same year; remove dead branches and leaves from the hemp field to prevent diseases; maintain plant and row spacing, and cultivate sustainable exploitation of Apocynum venetum fields.