CN108934723A - A kind of fructus lycii drip irrigation cultivation method of bilayer alternate covering stalk - Google Patents

Abstract

The invention discloses a kind of fructus lycii drip irrigation cultivation methods of double-deck alternate covering stalk, belong to arid, semiarid zone water-saving drip irrigation technical field of cultivation.Water-saving drip irrigation method of the invention is directed to semiarid and arid soil and climatic characteristic, it is handled by using fructus lycii cuttage seeding, furrow efficiently collects rain, trickle irrigation plant, irrigation program optimization and the double-deck alternate covering measure of broken wheat straw and corn stover in ditch, it improves rainfall and irrigates efficiency of water application, reduce the invalid waste of water resource.Compared with traditional fructus lycii flood irrigation cultural method, total output improves 15.13%, and superfine fruit rate improves 13.6%, and third class fruit rate reduces 4.6%, and the dry fruit 100-grain weight that is averaged increases 14.44%；Protein content increases 2.53%, and polyoses content increases 10.42%, and carotenoid content improves 45.169mg/100g.

Description

A kind of drip irrigation cultivation method of wolfberry with double-layer cross-covering straw

technical field

The invention belongs to the technical field of agricultural water-saving irrigation in arid and semi-arid regions, and in particular relates to a method for cultivating Chinese wolfberry with double-layer cross-covering straw drip irrigation.

Background technique

In Northwest my country, water resources are short, the climate is arid, and the evaporation is relatively large. The extensive irrigation methods of traditional agriculture can no longer adapt to the sustainable development of local agriculture. Flood irrigation and furrow irrigation are the most common methods of wolfberry irrigation. This not only wastes a lot of water resources, but also causes the groundwater level in some areas to rise, resulting in soil salinization. The chemical fertilizers carried by the flood seep into the ground, causing serious damage to groundwater resources. Pollution. In recent years, with the continuous development of water-saving agriculture and ecological agriculture, drip irrigation technology has been accepted by the broad masses of the people. Straw mulching technology is a new agronomic technology developed in recent years to maintain soil moisture and increase crop yield. The traditional single technology is widely used. On the basis of making full use of micro-rainfall ridges and furrows to collect rain, the present invention combines drip irrigation and mulching and applies it to wolfberry cultivation. It not only makes full use of the moisture characteristics and water-saving mechanism of drip irrigation to reduce ineffective water, At the same time, the use of straw mulching can better maintain soil moisture and reduce the evaporation of soil moisture, and optimize the irrigation method on the basis of the traditional irrigation of wolfberry, and finally make the cultivation of wolfberry have obvious advantages in water use, quality, and yield.

Contents of the invention

The object of the present invention is to provide a kind of wolfberry drip irrigation cultivation method that can increase the yield of wolfberry and save water and fertilizer.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

A water-saving drip irrigation cultivation method for Lycium barbarum with double-layer cross-covering straw, specifically comprising the following steps:

①Treatment of Lycium barbarum cutting seedlings: cut the middle part of the semi-lignified, 1cm-diameter thick cutting seedlings of the current year into cutting seedlings with 8-10 cm in length and 2-3 seed buds; mix EM bacterial agent, silicic acid Potassium and water are mixed according to the weight ratio of 1:2:200 to prepare the soaking solution; put the cutting seedlings into the soaking solution, soak for 5-8 hours in an environment of 25-28°C, take it out, and tilt the high-pressure water gun on the sandy ground Impact the sand at an angle of 45 degrees, rush out a deep pit with a depth of 50 cm, spray the cutting seedlings with a chitosan solution with a mass concentration of 1%, then put the cutting seedlings into the deep pit for sand storage, and set aside;

② Planting in the ditch: plow the land deeply, prepare the ridges, the ridge height is 25-30cm, the ridge top is flat and wide 40-60cm, the ridge bottom is 120-140cm wide, and the ditch bottom is 30-50cm wide. The seedlings are dug and planted in the planting ditch, the depth of the hole is 40cm, and the distance between plants is 100-150cm; the chelated calcium, chelated manganese, chelated magnesium, phenylalanine betaine, vitamin C and water are mixed according to the ratio of 0.5:0.1:0.2:0.6 : 0.3:500-1500 ratio mixed to make a nutrient solution, put the cutting seedlings of wolfberry into the planting hole, spray the nutrient solution on the root, then cover the soil and fill it up, the nutrient solution spraying amount is 10-50mg per plant;

③ Lay drip irrigation belt: Lay a drip irrigation belt in the planting ditch, the distance between drippers is 12-24cm, and the drip irrigation belt is 10cm away from the wolfberry seedlings; then double-layer cross-covering laying of straw on the surface of the wolfberry planting ditch;

④ Spring irrigation: After the cutting seedlings of wolfberry are planted, potassium humate is added to the irrigation water, and 0.3 kg of potassium humate is added per cubic meter of irrigation water; drip irrigation is carried out for 4-6 hours a day, and continuous irrigation is performed for 3 days to control the amount of drip per mu 18-24m ³ ;

⑤ Drip water and fertilizer: urea, pig manure, amino acid selenium, fulvic acid, xylose mother liquor, tea saponin, jasmonic acid, EM bacterial agent and water in a weight ratio of 3-5: 10-20: 0.1-0.4 : 1-3: 2-4: 0.1-0.5: 0.1-0.3: 1-2: 100 mixed in the fermentation tank, aerobic fermentation for 10-15 days, filtered through a 100-mesh nylon mesh, and the filtrate is water and fertilizer. Add water and fertilizer to irrigation water for drip irrigation, add 2-3kg of water and fertilizer per cubic meter of irrigation water, drip irrigation for 4-6 hours a day, continuous irrigation for 2 days, dripping water per mu is 20-30m ³ , respectively in early April to May Irrigate once in the first ten days of the month, irrigate once from early May to late May, irrigate three times from late May to late July, and irrigate once in late August, adding water and fertilizer for 6 times in total;

⑥Winter irrigation: Before winter, evenly spray the nutrient solution in step ② on the covered mixed straw, and turn the mixed straw into the ground in time. Afterwards, winter irrigation is carried out, drip irrigation is carried out for 2-4 hours every day, continuous irrigation for 2 days, and the amount of dripping water per mu is 12-15m ³ .

Preferably, when topdressing water and fertilizer in late August, drip irrigation is performed after the temperature of the irrigation water added with water and fertilizer is lowered to 4-6°C.

The straw is crushed wheat straw and corn straw, wherein the length of the crushed wheat straw is 15-20 cm, and the length of the corn straw is 110-130 cm after the whole straw is mechanically crushed.

The double-layer cross-covering laying of the straw, specifically, first evenly spread a layer of crushed wheat straw with a coverage of 450-600kg/mu, and evenly spread a layer of corn straw on the top of the crushed wheat straw with a coverage of 500-650kg/mu, and the corn straw The straw is covered along the wolfberry planting belt, and the crushed wheat straw and corn straw are laid orthogonally according to the length direction of the straw.

The beneficial effects of the present invention are:

1. According to the characteristics of soil and climate in semi-arid and arid areas, the present invention adopts a series of methods such as treatment of wolfberry cutting seedlings, high-efficiency rain collection in furrows, drip irrigation planting in trenches, spring irrigation, winter irrigation and drip application of water and fertilizer, double-layer straw cross-covering in trenches, etc. The measures have improved the utilization rate of rainfall and irrigation water, and reduced the waste of water resources. Compared with the traditional flood irrigation cultivation method, the total yield has increased by 15.13%, the rate of special-grade fruit has increased by 13.6%, and the rate of C-grade fruit has decreased by 4.6%. The grain weight increased by 14.44%, the protein content increased by 2.53%, the polysaccharide content increased by 10.42%, and the carotenoid content increased by 45.169mg/100g.

2. Long-term application of traditional irrigation methods will cause the accumulation of salt in the shallow layer of the soil to increase, thereby causing secondary salinization of the soil. Therefore, the present invention uses the measures of straw mulching, drip irrigation, water and fertilizer integration, which not only ensures the nutrition required for the growth of wolfberry Elements and water, and the total salt content in the shallow soil layer for cultivating Lycium barbarum did not increase significantly, and with the growth of the years, the total salt content in the shallow soil layer gradually decreased, improving the situation of secondary salinization of soil and sand physical and chemical properties of the soil.

3. The present invention carries out spring irrigation after the wolfberry is transplanted, which accelerates the rooting and germination speed of the wolfberry in the sandy soil, makes the wolfberry quickly colonize in the soil, and enhances the wind-sand resistance ability of the wolfberry.

Description of drawings

Fig. 1 is the Chinese wolfberry drip irrigation cultivation schematic diagram of double-layer cross covering straw of the present invention;

As shown in the figure: 1- wolfberry; 2- corn stalks; 3- crushed wheat straw; 4- drip irrigation belt; 5- ridge; 6- planting ditch.

Detailed ways

Example 1

A kind of drip irrigation cultivation method of Chinese wolfberry covered with straw in two layers, specifically comprising the following steps:

①Treatment of Lycium barbarum cutting seedlings: Cut the middle part of the semi-lignified, 1cm-diameter thick cutting seedlings of the current year into cutting seedlings with 8 cm in length and 2 seed buds; mix EM bacteria agent, potassium silicate and water according to Mix the ratio of weight ratio 1:2:200 to prepare the soaking solution; put the cutting seedlings into the soaking solution, soak for 5 hours in an environment of 25°C, take out the high-pressure water gun and impact the sand at an angle of 45 degrees to the sand, and wash it. Go out a deep pit with a depth of 50 cm, spray the cutting seedlings with a chitosan solution with a mass concentration of 1%, then put the cutting seedlings into the deep pit and carry out the sand storage process for subsequent use;

② Planting in the ditch: deep plowing and preparation of ridges, ridge height 25cm, ridge top flat and 40cm wide, ridge bottom width 120cm, and planting ditch bottom width 30cm. Dig holes and plant wolfberry cutting seedlings in the planting ditch in late March. The hole depth is 40cm, and the distance between plants is 100cm; chelated calcium, chelated manganese, chelated magnesium, phenylalanine betaine, vitamin C and water are mixed according to the ratio of 0.5:0.1:0.2:0.6:0.3:500 to make a nutrient solution , Put the cutting seedlings of wolfberry into the planting hole, spray the nutrient solution on the root, then cover the soil and fill it up, the nutrient solution spraying amount is 10mg per plant;

③Lay drip irrigation belt: Lay a drip irrigation belt in the planting ditch with a distance of 12cm between the emitters and 10cm from the drip irrigation belt to the wolfberry seedlings; then spread straw evenly on the surface of the wolfberry planting ditch, the straw is divided into crushed wheat straw and corn straw, and the length of the crushed wheat straw is The treatment is 15cm. The corn stalks are mechanically crushed and the length is 110cm. When laying the straw on the surface of the wolfberry planting ditch, spread a layer of crushed wheat straw evenly. For corn stalks, the coverage amount is 500kg/mu, and the corn stalks are covered along the wolfberry planting belt, and the crushed wheat straw and corn stalks are laid orthogonally according to the length direction of the straws.

④ Spring irrigation: After the cutting seedlings of wolfberry are planted, potassium humate is added to the irrigation water, and 0.3 kg of potassium humate is added per cubic meter of irrigation water; drip irrigation is carried out for 4 hours a day, continuous irrigation for 3 days, and the dripping water per mu is controlled at 18m ³ ;

⑤ Applying water and fertilizer: urea, pig manure, amino acid selenium, fulvic acid, xylose mother liquor, tea saponin, jasmonic acid, EM bacterial agent and water in a weight ratio of 3:10:0.1:1:2:0.1 : 0.1:1:100 mixed in the fermentation tank, aerobic fermentation for 10 days, filtered, the filtrate is water and fertilizer, water and fertilizer are added to irrigation water for drip irrigation, 2kg of water and fertilizer is added to each cubic meter of irrigation water, and drip irrigation is performed for 4 hours a day , continuous irrigation for 2 days, dripping water per mu is 20m ³ , irrigated once from early April to early May, once from early May to late May, three times from late May to late July and late August Once, water and fertilizer were added for 6 times in total; when water and fertilizer were topdressed in late August, the temperature of the irrigation water added with water and fertilizer was lowered to 4°C before drip irrigation;

⑥Winter irrigation: Before winter, evenly spray the nutrient solution in step ② on the covered mixed straw, turn the ground in time and turn the mixed straw into the ground. For winter irrigation, drip irrigation is carried out for 2 hours every day, continuous irrigation for 2 days, and the dripping water per mu is 12m ³ .

Example 2

A kind of drip irrigation cultivation method of Chinese wolfberry covered with straw in two layers, specifically comprising the following steps:

① Treatment of Lycium barbarum cutting seedlings: Cut the middle part of the semi-lignified, 1cm-diameter thick cutting seedlings of the current year into cutting seedlings with 10 cm in length and 3 seed buds; mix EM bacteria agent, potassium silicate and water according to Mix the ratio of weight ratio 1:2:200 to prepare the soaking solution; put the cutting seedlings into the soaking solution, soak for 8 hours in an environment of 28°C, take out the high-pressure water gun to impact the sand at an angle of 45 degrees to the sand, and wash it. Go out a deep pit with a depth of 50 cm, spray the cutting seedlings with a chitosan solution with a mass concentration of 1%, then put the cutting seedlings into the deep pit and carry out the sand storage process for subsequent use;

② Planting in the ditch: deep plowing and preparation of ridges, the ridge height is 30cm, the ridge top is flat and 60cm wide, the ridge bottom is 140cm wide, and the ditch bottom is 50cm wide. The depth is 40cm, the distance between plants is 150cm; chelated calcium, chelated manganese, chelated magnesium, phenylalanine betaine, vitamin C and water are mixed according to the ratio of 0.5:0.1:0.2:0.6:0.3:500-1500 to make nutrition Put the cutting seedlings of Lycium barbarum into the planting hole and spray the nutrient solution on the roots, then cover with soil and fill it up. The amount of nutrient solution sprayed is 50 mg per plant;

③Lay drip irrigation belt: Lay a drip irrigation belt in the planting ditch with a distance of 24cm between the emitters and 10cm from the drip irrigation belt to the wolfberry seedlings; then lay double-layer cross-covering of straw on the surface of the wolfberry planting ditch; the straw is divided into crushed wheat straw and corn straw , the length of crushed wheat straw is 20cm, and the length of corn straw is 130cm after the whole stalk is mechanically crushed. Spread a layer of corn stalks evenly, the coverage amount is 650kg/mu, and the corn stalks are covered along the wolfberry planting belt, and the crushed wheat straws and corn stalks are laid orthogonally according to the length direction of the straws;

④ Spring irrigation: After the cutting seedlings of wolfberry are planted, potassium humate is added to the irrigation water, and 0.3 kg of potassium humate is added per cubic meter of irrigation water; drip irrigation is carried out for 6 hours a day, and continuous irrigation is performed for 3 days, and the dripping water per mu is controlled to 24m ³ ;

⑤ Water and fertilizer application: urea, pig manure, amino acid selenium, fulvic acid, xylose mother liquor, tea saponin, jasmonic acid, EM bacterial agent and water in a weight ratio of 5:20:0.4:3:4:0.5: The ratio of 0.3:2:100 is mixed in the fermentation tank, aerobically fermented for 15 days, filtered, and the filtrate is water and fertilizer. Add the water and fertilizer to the irrigation water for drip irrigation. Add 3kg of water and fertilizer per cubic meter of irrigation water, and drip irrigation for 6 hours a day. Continuous irrigation for 2 days, dripping water per mu is 30m ³ , irrigated once from early April to early May, once from early May to late May, three times from late May to late July, and once in late August , adding water and fertilizer for 6 times in total; when topdressing water and fertilizer in late August, the temperature of the irrigation water with water and fertilizer dropped to 6°C before drip irrigation;

⑥Winter irrigation: Before winter, evenly spray the nutrient solution in step ② on the covered mixed straw, turn the ground in time and turn the mixed straw into the ground. The spraying amount is 0.3kg of nutrient solution per kilogram of straw. For winter irrigation, drip irrigation is carried out for 4 hours a day, continuous irrigation for 2 days, and the dripping water per mu is 15m ³ .

Example 3

A kind of drip irrigation cultivation method of Chinese wolfberry covered with straw in two layers, specifically comprising the following steps:

① Treatment of Lycium barbarum cutting seedlings: Cut the middle part of the semi-lignified, 1cm-diameter thick cutting seedlings of the current year into cutting seedlings with 10 cm in length and 3 seed buds; mix EM bacteria agent, potassium silicate and water according to Mix the ratio of weight ratio 1:2:200 to prepare the soaking solution; put the cutting seedlings into the soaking solution, soak for 7 hours in an environment of 26°C, take out the high-pressure water gun to impact the sand at an angle of 45 degrees to the sand, and wash it. Go out a deep pit with a depth of 50 cm, spray the cutting seedlings with a chitosan solution with a mass concentration of 1%, then put the cutting seedlings into the deep pit and carry out the sand storage process for subsequent use;

② Planting in the ditch: deep plowing and preparation of ridges, the ridge height is 25cm, the ridge top is flat and 50cm wide, the ridge bottom is 130cm wide, and the ditch bottom is 40cm wide. The depth is 40cm, the distance between plants is 120cm; chelated calcium, chelated manganese, chelated magnesium, phenylalanine betaine, vitamin C and water are mixed according to the ratio of 0.5:0.1:0.2:0.6:0.3:500-1500 to make nutrition Put the cutting seedlings of Lycium barbarum into the planting hole and spray the nutrient solution on the root, then cover with soil and fill it up. The amount of nutrient solution sprayed is 30 mg per plant;

③Lay drip irrigation belt: Lay a drip irrigation belt in the planting ditch with a distance of 18cm between the emitters and 10cm from the drip irrigation belt to the wolfberry seedlings; then spread straw evenly on the surface of the wolfberry planting ditch, and the straw is divided into crushed wheat straw and corn straw, and the length of the crushed wheat straw is The corn stalks are 20cm long and the whole stalks are mechanically crushed. The length is 120cm. When the straw is laid in a double-layer cross-covering mode, a layer of crushed wheat straw is evenly spread. The coverage is 500kg/mu, and a layer of corn is evenly spread on the top of the crushed wheat Straw, the coverage amount is 600kg/mu, and the corn straw is covered along the wolfberry planting belt, and the crushed wheat straw and corn straw are laid orthogonally according to the length direction of the straw;

④Spring irrigation: After the cutting seedlings of wolfberry are planted, potassium humate is added to the irrigation water, and 0.3 kg of potassium humate is added per cubic meter of irrigation water; drip irrigation is carried out for 5 hours a day, continuous irrigation for 3 days, and the dripping water per mu is controlled to 21m ³ ;

⑤ Applying water and fertilizer: urea, pig manure, amino acid selenium, fulvic acid, xylose mother liquor, tea saponin, jasmonic acid, EM bacteria agent and water in a weight ratio of 4:15:0.3:2:3:0.3 : The ratio of 0.2:1.5:100 is mixed and placed in the fermentation tank, aerobically fermented for 12 days, filtered, and the filtrate is water and fertilizer. Add water and fertilizer to irrigation water for drip irrigation, add 2.5kg of water and fertilizer per cubic meter of irrigation water, and drip irrigation for 5 Hours, continuous irrigation for 2 days, dripping water per mu is 25m ³ , irrigated once from early April to early May, once from early May to late May, three times from late May to late July, and late August Irrigate once, and add water and fertilizer for 6 times in total; when topdressing water and fertilizer in late August, reduce the temperature of the irrigation water with water and fertilizer to 5°C and then perform drip irrigation;

⑥Winter irrigation: Before winter, evenly spray the nutrient solution in step ② on the covered mixed straw, turn the ground in time and turn the mixed straw into the ground. For winter irrigation, drip irrigation is carried out for 3 hours a day, continuous irrigation for 2 days, and the amount of dripping water per mu is 14m ³ .

Test example 1

1. Natural situation of the test area: The test area is located at the front of the Tengger Desert in the Jingdian Irrigation Area, in the transition zone from the Tengger Desert to the Loess Plateau, with an average annual precipitation of 180-190 mm, annual evaporation of 3038.1 mm, and a relative humidity of 44 %, the annual average wind speed is 3.5m/s, the maximum wind speed is 21m/s, and the annual average number of days with strong wind and dust is 21 days. It belongs to the continental arid climate. The average annual sunshine hours are 2,726.5 hours, the annual average temperature is 8-10°C, the extreme maximum temperature is 36.6°C, the extreme minimum temperature is -27.3°C, and the frost-free period is 140-150 days. It is rich in light and heat resources. The irrigation area is 1600-1750m above sea level and the terrain is flat. The vegetation is arid and semi-arid desert grassland vegetation type, and the soil is cultivated desert lime-calcium soil.

2. The test site is selected to be carried out in the 1-year-old wolfberry garden. The decomposed organic fertilizer is 20-30t/hm ² , the nitrogen fertilizer is 180kg/hm ² , and the potassium fertilizer is 165-190kg/hm ² .

3. The seedlings of the test material "Ningqi No. 1" were provided by Ningxia Wolfberry Research Institute, and the cutting seedlings of "Ningqi No. 1" were processed according to the method described in step ① of Example 2.

4. Design of the experiment: 2 treatments (Table 1) were set in the experiment, and each treatment was repeated 3 times, including 6 plots, each with an area of 200m ² , arranged in a completely randomized block group.

5. Test method: process 1 group and carry out water-saving drip irrigation cultivation method according to Embodiment 2 of the present invention; process 2 groups: carry out ridging and planting according to the method described in step ②, then carry out supplementary irrigation according to traditional flood irrigation, and other field management according to local Lycium barbarum cultivation procedures were carried out.

6. Test time: from March 2014 to March 2015.

7. Determination method: At the end of the growth period of wolfberry, count the total output of wolfberry, fruit grade, average weight of 100 seeds of dried fruit, and determine the content of protein, polysaccharide and carotenoid in dried fruit of wolfberry.

8. The measurement results are shown in Table 1 and Table 2

Table 1 Effects of two irrigation methods on the physical properties of Lycium barbarum

As can be seen from Table 1, the Lycium barbarum cultivated by the water-saving drip irrigation method of the present invention is compared with the traditional flood irrigation cultivation Lycium barbarum, the total output of the plot has increased by 15.13%, the special-grade fruit rate has increased by 13.6%, and the C-grade fruit rate has decreased by 4.6%.

Table 2 Effects of two irrigation methods on the quality of Lycium barbarum

As can be seen from Table 2, the Lycium barbarum that implements the water-saving drip irrigation method cultivation of the present invention is compared with traditional flood irrigation cultivation Lycium barbarum, and the average 100-grain weight of dried fruit has increased by 14.44%; Protein content has increased by 2.53%, and polysaccharide content has increased by 10.42%. The element content increased by 45.169mg/100g.

Test example 2

1. The experimental demonstration area is located in Hongyue Village, Caowotan Town, the center of Jingdian Phase I irrigation area. The altitude is 1560-1600m, the annual average temperature is 8.2°C, the annual average frost-free period is 141 days, the annual average precipitation is 192mm, and the annual average evaporation is 3028mm , the soil is aeolian sandy soil, the pH of the soil is 8.3, the total salt content of the soil at 15 cm below the surface is 1.4973g/kg, and the method for measuring the total ion content of the soil is the conductometric method.

2, test time 2010～2016, totally 7 years, apply the water-saving drip irrigation method described in the embodiment of the present invention 2 every year to cultivate wolfberry (cultivar: Ningqi No. 1), when the growth period of wolfberry ends, the day before winter irrigation The total salinity of the soil at 15cm below the cultivation surface was measured.

3. The measurement results are shown in Table 3 below

Table 3 Statistical table of total soil salt content in different years

It can be seen from Table 3 that during the 7-year test period from 2010 to 2016, the total salt content in the shallow soil layer of wolfberry cultivation did not increase significantly, and with the increase of the number of years, the total salt content in the shallow soil layer gradually decreased. Therefore, it is obvious that the long-term application of the water-saving drip irrigation method of the present invention will not cause the accumulation of salt in the shallow layer of the soil, and can improve the secondary salinization of the soil.

Claims (4)

1. a kind of Lycium barbarum drip irrigation cultivation method of double-deck cross covering straw is characterized in that, specifically comprises the following steps: ①Treatment of Lycium barbarum cutting seedlings: Cut the middle part of the semi-lignified, 1cm-diameter thick cutting seedlings of the current year into cutting seedlings with 8-10 cm in length and 2-3 seed buds; mix EM bacterial agent, silicic acid Potassium and water are mixed according to the weight ratio of 1:2:200 to prepare the soaking solution; put the cutting seedlings into the soaking solution, soak for 5-8 hours in an environment of 25-28°C, take it out, and tilt the high-pressure water gun on the sandy ground Impact the sand at an angle of 45 degrees, rush out a deep pit with a depth of 50 cm, spray the cutting seedlings with a chitosan solution with a mass concentration of 1%, then put the cutting seedlings into the deep pit for sand storage, and set aside; ② Planting in the ditch: deep plowing and preparation of ridges, the ridge height is 25-30cm, the ridge top is flat and 40-60cm wide, the ridge bottom is 120-140cm wide, and the ditch bottom is 30-50cm wide. Dig the wolfberry cutting seedlings in late March. The hole is planted in the planting ditch, the depth of the hole is 40cm, and the distance between plants is 100-150cm; the chelated calcium, chelated manganese, chelated magnesium, phenylalanine betaine, vitamin C and water are mixed according to the ratio of 0.5:0.1:0.2:0.6:0.3 : 500-1500 mixed to make a nutrient solution, put the wolfberry cutting seedlings into the planting hole, spray the nutrient solution on the root, then cover the soil and fill it up, the nutrient solution spraying amount is 10-50mg per plant; ③ Lay drip irrigation belt: Lay a drip irrigation belt in the planting ditch, the distance between drippers is 12-24cm, and the drip irrigation belt is 10cm away from the wolfberry seedlings; then double-layer cross-covering laying of straw on the surface of the wolfberry planting ditch; ④ Spring irrigation: After the cutting seedlings of wolfberry are planted, potassium humate is added to the irrigation water, and 0.3 kg of potassium humate is added per cubic meter of irrigation water; drip irrigation is carried out for 4-6 hours a day, and continuous irrigation is performed for 3 days to control the amount of drip per mu 18-24m ³ ; ⑤ Drip water and fertilizer: urea, pig manure, amino acid selenium, fulvic acid, xylose mother liquor, tea saponin, jasmonic acid, EM bacterial agent and water in a weight ratio of 3-5: 10-20: 0.1-0.4 : 1-3: 2-4: 0.1-0.5: 0.1-0.3: 1-2: 100 mixed in the fermentation tank, aerobic fermentation for 10-15 days, filtered through a 100-mesh nylon mesh, and the filtrate is water and fertilizer. Add water and fertilizer to irrigation water for drip irrigation, add 2-3kg of water and fertilizer per cubic meter of irrigation water, drip irrigation for 4-6 hours a day, continuous irrigation for 2 days, dripping water per mu is 20-30m ³ , respectively in early April to May Irrigate once in the first ten days of the month, irrigate once from early May to late May, irrigate three times from late May to late July, and irrigate once in late August, adding water and fertilizer for 6 times in total; ⑥Winter irrigation: Before winter, evenly spray the nutrient solution in step ② on the covered mixed straw, and turn the mixed straw into the ground in time. Afterwards, winter irrigation is carried out, drip irrigation is carried out for 2-4 hours every day, continuous irrigation for 2 days, and the amount of dripping water per mu is 12-15m ³ . 2. A method for drip irrigation cultivation of Lycium barbarum with double-layer cross-covering straws according to claim 1, characterized in that: when topdressing water and fertilizer in late August, the temperature of the irrigation water added with water and fertilizer is lowered to 4-6°C. 3. A kind of method for drip irrigation cultivation of Lycium barbarum with double-layer cross-covering straw according to claim 1, characterized in that: said straw is crushed wheat straw and corn straw, wherein the length of crushed wheat straw is 15-20cm, and the length of corn straw is stalk Mechanically crushed, the length is 110-130cm. 4. a kind of double-layer cross-covering method for wolfberry drip irrigation of straw according to claim 3 is characterized in that: when the straw is laid in a double-layer cross-covering type, a layer of crushed wheat straw is first evenly spread, and the covering amount is 450-600kg/mu, and a layer of corn stalks is evenly spread on the top of the crushed wheat straw, the coverage amount is 500-650kg/mu, and the corn straw is covered along the wolfberry planting belt, and the crushed wheat straw and corn straw are laid orthogonally according to the length of the straw.