Planting method for intercropping bamboo reeds and soybeans

Abstract

The invention relates to the technical field of intercropping of crops, in particular to a planting method for intercropping of bamboo reeds and soybeans. The method provided by the invention specifically comprises the following steps: intercropping bamboo reeds and soybeans according to the planting row number of 1: (1-2); the planting number of the bamboo reed is 1 plant / hole; 2-4 soybeans are sown in each hole; the distance between the adjacent bamboo reed holes and soybean holes is 20-30 cm; the distance between every two adjacent bamboo reed holes is 50-100 cm; the distance between every two adjacent soybean holes is 40-60 cm. According to the bamboo reed and soybean intercropping method, the yield and nutritional ingredients of bamboo reeds can be remarkably increased, and the economic income is increased; the soil components can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of intercropping of crops, and in particular to a planting method of intercropping reed and soybean. Background Art

[0002] Arundodis ( Arundo donax ) is a perennial herbaceous plant of the genus Phragmites in the Poaceae family. It has the advantages of fast growth, high biological yield, wide distribution and adaptability, high crude protein content and crude fiber content, and can be fully mechanized in terms of planting, harvesting, transportation and storage, making it a high-quality feed choice. Soybean is an annual herb of the genus Glycine max in the Leguminosae family. Soybean is a grain and oil crop. Feed soybean is cultivated soybean used to produce feed and forage. The nitrogen fixation effect of its rhizobia is an important source of nitrogen fertilizer in traditional agriculture. It is the best crop for combining use and breeding. At present, no technology related to the intercropping of Phragmites and soybeans has been found. In view of this, the present invention is specially proposed. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a planting method of intercropping reed and soybean, which can significantly increase the yield of reed and improve the physical and chemical properties of soil.

[0004] Specifically, the technical solution of the present invention is as follows: In a first aspect, the present invention provides a planting method of intercropping reed bamboo and soybean, wherein reed bamboo and soybean are intercropped according to a planting row ratio of 1:1-2; the number of reed bamboo planted is 1 plant / hole; the sowing amount of soybean is 2-4 seeds / hole; the spacing between adjacent reed bamboo holes and soybean holes is 20-30 cm; the spacing between adjacent reed bamboo holes and reed bamboo holes is 50-100 cm; the spacing between adjacent soybean holes is 40-60 cm.

[0005] Preferably, Phragmites australis and soybean are sown at the same time.

[0006] Preferably, sowing is carried out after winter every year when the ground temperature at 5-10 cm of the soil layer reaches above 10°C.

[0007] Preferably, the sowing time is from mid-to-late April to mid-June.

[0008] Preferably, 2-3 seedlings are left in each soybean hole.

[0009] Preferably, urea and diammonium phosphate are applied after sowing; the application amount of urea is 25±3 kg / mu; the application amount of diammonium phosphate is 10±1 kg / mu.

[0010] Preferably, thinning and transplanting are carried out when the soybeans grow the first 1-2 compound leaves after germination.

[0011] Preferably, weeding is performed twice, the first time when the Phragmites australis grows new tillering true leaves, and the second time when the Phragmites australis grows to a height of 0.5-1 meter; during the first weeding, seedlings are supplemented; during the second weeding, topdressing is performed.

[0012] Preferably, urea is applied as topdressing to a distance of 10-15 cm from the roots of Phragmites australis plants, with an amount of 35-40 kg / mu.

[0013] Preferably, the Phyllostachys reed seedlings must be watered thoroughly on the first day of planting and once on the seventh day.

[0014] Preferably, for use as biomass fuel, Phragmites australis is harvested after heading, flowering and cessation of growth.

[0015] Preferably, for use as fodder, Phragmites australis is harvested when the plant height is 1.5-2.5 meters.

[0016] Beneficial effects:

[0017] The present invention provides a planting method of intercropping reed bamboo and soybean, wherein reed bamboo and soybean are intercropped according to a planting row ratio of 1:1-2; the number of reed bamboo planted is 1 plant / hole; the sowing amount of soybean is 2-4 seeds / hole; the spacing between adjacent reed bamboo holes and soybean holes is 20-30 cm; the spacing between adjacent reed bamboo holes and reed bamboo holes is 50-100 cm; the spacing between adjacent soybean holes and soybean holes is 40-60 cm. The intercropping method of reed bamboo and soybean provided by the present invention can significantly increase the yield and nutritional content of reed bamboo, increase economic income, and effectively improve soil composition. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be described below.

[0019] Figure 1 This is a photo of Phragmites australis at the planting stage in Example 1 of the present invention.

[0020] Figure 2 The germination status of soybeans intercropped with Phragmites australis in Example 1 of the present invention is shown.

[0021] Figure 3 The growth conditions of soybean intercropped with Phragmites australis in Example 1 of the present invention are shown.

[0022] Figure 4 This is a photo of soybeans growing around Phragmites australis in Example 1 of the present invention.

[0023] Figure 5 It is a single clump of soybean (0050) intercropped with Phragmites australis in Example 1 of the present invention.

[0024] Figure 6 It is a single clump of Phragmites australis in Example 1 of the present invention.

[0025] Figure 7 The growth conditions of soybean intercropped with Phragmites australis in Example 1 of the present invention are shown.

[0026] Figure 8 It is a single clump of soybean (Kedou 35) intercropped with Phragmites australis in Example 2 of the present invention.

[0027] Fig. 9 It is a single clump of Phragmites australis in embodiment 2 of the present invention.

[0028] Fig.10 The growth conditions of soybean intercropped with Phragmites australis in Example 2 of the present invention are shown. DETAILED DESCRIPTION

[0029] The present invention discloses a planting method of intercropping reed bamboo and soybean, so as to solve the problem that there is no planting technology of intercropping reed bamboo and soybean at present, and there is no unified standard. The method disclosed by the present invention comprises the following steps: step 1, site selection and land preparation; step 2, variety selection, selecting reed bamboo and soybean; step 3, sowing, intercropping reed bamboo and soybean, the planting row ratio is 1:1 or 1:2, the reed bamboo row spacing is 100cm, the soybean is intercropped in the reed bamboo row, and the spacing between reed bamboo and soybean is 20-30cm; step 4, field management; step 5, harvesting and storage. In the present invention, reed bamboo and soybean are sown at the same time, wherein the optional planting time of reed bamboo is from mid-April to early June; spring soybean can be sown in mid-April, the whole growth cycle is 100-110 days, and it can be harvested in late July; summer soybean can be sown in suitable early June, the whole growth cycle is 140-150 days, and it can be harvested in mid-to-late October. Phragmites for forage are planted in spring and harvested in summer and autumn, and intercropped with soybeans in spring and summer.

[0030] Preferably, in step 1, a flat plot with convenient irrigation and drainage, ventilation and facing the sun is selected; land preparation includes deep plowing with a depth of 20-25 cm. After the deep plowed soil is dried, rotary tillage with a depth of 10-15 cm is performed, and the soil is finely raked and leveled to remove weeds and dead branches.

[0031] Preferably, the reed bamboo is selected from Hangzhu No. 1, Hangzhu No. 2, etc.; and the soybean is selected from soybean varieties suitable for local cultivation or fodder soybean varieties.

[0032] Preferably, Phragmites australis is hardened for 5-10 days before planting, and soybeans are aired on a sunny day for 1-2 days before sowing.

[0033] Preferably, Phragmites australis and soybean are sown from mid-to-late April to mid-June when the ground temperature at 5-10 cm of the soil layer is above 10°C.

[0034] Preferably, the planting rate of Phragmites australis is 1 plant / hole, the plant height is 15-30 cm, the spacing between Phragmites australis plants is 50-100 cm, the sowing rate of soybeans is 2-4 seeds / hole, the spacing between soybean holes is 40-60 cm, and 2-3 seedlings are left in each hole.

[0035] Preferably, the present invention combines sowing, and urea and diammonium phosphate are mixed evenly, generally 25kg urea and 10kg diammonium phosphate per mu, and applied into the furrows of Phragmites australis and soybeans.

[0036] Preferably, the specific steps of field management are as follows: step a, thinning and determining seedlings, counting the survival rate after the new buds of Phragmites grow out, timely replanting, and determining seedlings when the soybeans grow the first to second compound leaves after the seedlings emerge; step b, intertillage and weeding, which are carried out twice, the first time when the Phragmites grow new tillering true leaves, shallow weeding combined with replanting, the second time when the Phragmites grow 0.5-1 meters, deep weeding combined with topdressing; step c, topdressing, after the Phragmites are planted 1 meter About a month, combined with inter-row cultivation and weeding, apply 35-40kg / mu of urea, and apply urea to 10-15cm away from the roots of the reed plants; step d, disease and pest control, reed disease and pest control: use chlorine-free insecticides including at least one of avermectin and dimehypo, etc.; soybean disease and pest control: spray 500 times of 65% mancozeb wettable powder for downy mildew; spray 1000 times of 70% methyl thiophanate for gray spot.

[0037] Preferably, for use as fodder, Phragmites australis is harvested when the plant height is 1.5-2.5 meters.

[0038] Another preferred method for using the bamboo as biomass fuel is to harvest the bamboo after heading, flowering and stopping growth, and then dry and store it after harvesting.

[0039] The invention is a highly intensive new planting system which can greatly increase the yield of Phragmites australis and can improve the physical and chemical properties of soil.

[0040] In a more specific and preferred embodiment, the technical solution provided by the present invention comprises the following steps: Step 1: Select the land and prepare the land; select a flat plot with convenient drainage and irrigation, good ventilation and sunny direction; land preparation includes deep plowing to a depth of 20-25cm. After the deep plowed soil is dried, rotary tillage to a depth of 10-15cm, fine harrowing and leveling, and clearing weeds and dead branches.

[0041] Step 2: Variety selection: choose Phragmites australis and fodder soybeans.

[0042] Step 3, reed bamboo is hardened for 5-10 days before planting, and soybeans are dried in the sun on a sunny day for 1-2 days before sowing. For sowing, reed bamboo and fodder soybeans are intercropped, with a planting row ratio of 1:1 or 1:2, a reed bamboo row spacing of 100cm, soybeans are intercropped in the reed bamboo row, and the spacing between reed bamboo and soybeans is 20-30cm; reed bamboo and soybeans are sown at the same time from mid-to-late April to early June when the ground temperature at 5-10cm of the soil layer is above 10℃. Reed bamboo is planted at 1 plant / hole, with a plant height of 15-30cm, a reed bamboo plant spacing of 50-100cm, a soybean sowing rate of 2-4 seeds / hole, a soybean hole spacing of 40-60cm, and 2-3 seedlings per hole. Combined with sowing, urea and diammonium phosphate are mixed evenly, generally 25kg urea and 10kg diammonium phosphate per mu, and applied to the furrows and holes of reed bamboo and soybeans.

[0043] Step 4, field management; the specific steps of field management are as follows: step a, thinning and weeding, after the new buds of Phragmites grow out, the survival rate is counted, and seedlings are supplemented in time. After the soybean seedlings emerge, the first to second compound leaves are grown, and thinning and weeding are carried out; step b, intertillage and weeding, which are carried out twice. The first time is when the Phragmites grow new tillering true leaves, and shallow weeding is carried out in combination with seedling supplementation. The second time is when the Phragmites grow 0.5-1 meters, and deep weeding is carried out in combination with topdressing; step c, topdressing, about one month after the Phragmites are planted, combined with intertillage and weeding, topdressing 35-40k urea g / mu, urea is applied to 10-15 cm away from the root of the Phragmites australis plant; step d: the Phragmites australis seedlings must be watered thoroughly on the first day of planting, and watered thoroughly once on the 7th day, and then the Phragmites australis seedlings are watered according to the different regional seasons and soil moisture conditions; step e: pest and disease control: chlorine-free insecticides for pest control include at least one of avermectin, dimethoate, etc.; soybean pest and disease control: 65% mancozeb wettable powder is sprayed at a dilution of 500 times for downy mildew; 70% thiophanate-methyl is sprayed at a dilution of 1000 times for gray spot.

[0044] Step 5: Harvest and storage. For use as feed, the reed bamboo is harvested when the plant height is 1.5-2.5 meters. For use as biomass fuel, the reed bamboo is harvested after heading, flowering and stopping growth. After harvesting, it is dried and stored.

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The endpoints and any values ​​of the ranges disclosed in this specification are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "specific implementations", or "some specific implementations" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] In the examples provided in this specification, if no specific techniques or conditions are specified, the techniques or conditions described in the literature in this field or the product instructions are used. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased through regular channels.

[0049] Example 1 This embodiment provides a planting method for intercropping Phragmites australis and soybeans, comprising the following steps.

[0050] (1) The planting site is located in Changping District, Beijing. A flat plot with an area of ​​0.5 mu was selected. The soil is sandy loam. Land preparation includes deep plowing to a depth of 20-25 cm. After the deep plowed soil is dried, it is rotary tilled to a depth of 10-15 cm, and the soil is leveled and weeds and dead branches are removed.

[0051] (2) Variety selection: Phragmites australis and forage soybeans were selected; Phragmites australis was selected from Hangzhu No. 1; soybeans were selected from forage soybean line 0050. Phragmites australis was used as a control.

[0052] (3) Harden the seedlings of Phragmites australis for 10 days before planting, and dry them in the sun for 1 day on a sunny day before sowing. Sowing, intercropping Phragmites australis and fodder soybeans, the planting row ratio is 1:1, the spacing between Phragmites australis plants is 50cm×100cm, and soybeans are intercropped in the Phragmites australis rows, with a spacing of 25cm between Phragmites australis and soybeans; Phragmites australis will be planted on May 21, 2024, with a plant height of 15-20cm at the time of planting. Plant one soybean hole between Phragmites australis plants, and sow 3 soybeans in each hole. Combined with sowing, mix urea and diammonium phosphate evenly (25kg urea and 10kg diammonium phosphate per mu), and apply it to the furrows and holes of Phragmites australis and soybeans.

[0053] (4) The specific steps of field management are as follows: a. Thinning and weeding. The survival rate of Phragmites australis is 100% after the new buds grow out. The seedlings of soybeans are thinned and weeded when the first to second compound leaves grow out after the seedlings emerge. b. Intertillage and weeding are carried out twice. The first time is on June 21, 2024 when Phragmites australis grows new tillering true leaves. The second time is on July 22, 2024 when Phragmites australis grows 0.5-1 meters. Deep weeding is carried out in combination with topdressing. c. Topdressing is carried out on June 21, 2024, about one month after Phragmites australis is planted. Topdressing is carried out in combination with intertillage and weeding. Urea is applied at a distance of 10-15 cm from the roots of Phragmites australis plants. d. Phragmites australis seedlings must be watered thoroughly on the first day after planting. Water thoroughly once on the 7th day, and then water three times according to the different seasons and soil moisture conditions in different regions. e. Pest and disease control: Phyllostachys reed had no pests, soybean had slight pests, and no pesticide spraying was carried out.

[0054] (5) Harvested reed bamboo and soybean can be used as feed: reed bamboo will be harvested on August 19, 2024, and dried and stored after harvesting. The height of pure reed bamboo plant is 2.1 meters, and the weight of a single clump is 1.38 kg; the height of soybean plant intercropped with reed bamboo is 2.35 meters, and the weight of a single clump is 2.05 kg, with a 14.3% increase in plant height and a 48.5% increase in single clump weight; the height of soybean plant is 1.51 meters, and the weight of a single plant is 0.03142 kg.

[0055] The yield and economic benefits of reed bamboo and soybean under the two treatments of pure reed bamboo and reed bamboo intercropping with soybean are shown in Table 1. The yield of reed bamboo under the treatment of reed bamboo intercropping with soybean is 2730 kg / mu, which is 48.5% higher than that of pure reed bamboo. The economic benefit under the treatment of reed bamboo intercropping with soybean is 1688 yuan / mu, which is 53.04% higher than that of pure reed bamboo. It can be seen that reed bamboo intercropping with soybean can effectively increase the yield of reed bamboo and increase economic income.

[0056] Table 1 Yield and economic benefits of Phragmites australis and soybean (0050) under different treatments

[0057] The crude protein content of pure reed bamboo dry sample is 11.32%, crude fat content is 0.96%, crude fiber content is 35.34%, and crude ash content is 10.14%; the protein content of reed bamboo intercropped is 14.20%, crude fat content is 1.74%, crude fiber content is 39.43%, and crude ash content is 18.18%; soybean (0050) protein content is 14.95%, crude fat content is 1.52%, crude fiber content is 38.65%, and crude ash content is 11.38%. Reed bamboo intercropped with soybean can effectively improve the nutritional content of reed bamboo.

[0058] The performance of soil nutrients under the two treatments of reed bamboo and soybean is shown in Table 2. Under the treatment of reed bamboo intercropping with soybean, the soil organic matter content was 0.82%, the alkaline nitrogen content was 119.01 mg / kg, the available phosphorus content was 4.31 mg / kg, the available potassium content was 222.58 mg / kg, the total colony count was 8570000 cfu / g, the urease activity was 0.38 ng / g, the alkaline phosphatase activity was 1.25 ng / g, the catalase activity was 0.95 ng / g, and the sucrase activity was 1.71 ng / g. They increased by 6%, 61%, 52%, 11%, 597%, 3%, 12%, 6%, and 14% respectively compared with the pure reed bamboo. It can be seen that reed bamboo intercropping with soybean can effectively improve the physical and chemical properties of the soil.

[0059] Table 2 Performance of soil nutrients under different treatments

[0060] Example 2 This embodiment provides a planting method for intercropping Phragmites australis and soybeans, comprising the following steps.

[0061] (1) The planting site is located in Changping District, Beijing. A flat plot with an area of ​​0.4 mu was selected. The soil is sandy loam. Land preparation includes deep plowing to a depth of 20-25 cm. After the deep plowed soil is dried, it is rotary tilled to a depth of 10-15 cm, and the soil is leveled and weeds and dead branches are removed.

[0062] (2) Variety selection: Phragmites australis and fodder soybeans were selected; Phragmites australis was selected from Hangzhu No. 2; soybeans were selected from soybean variety Kedou 35. Phragmites australis was used as a control.

[0063] (3) Harden the seedlings of Phragmites australis for 10 days before planting, and dry them in the sun for 1 day on a sunny day before sowing. Sowing, intercropping Phragmites australis and soybeans, the planting row ratio is 1:1, the spacing between Phragmites australis plants is 50cm×100cm, and soybeans are intercropped in the Phragmites australis rows, with a spacing of 25cm between Phragmites australis and soybeans; Phragmites australis will be planted on May 21, 2024, with a plant height of 15-20cm at the time of planting. Plant one soybean hole between Phragmites australis plants, and sow 3 soybeans in each hole. Combined with sowing, mix urea and diammonium phosphate evenly (25kg urea and 10kg diammonium phosphate per mu), and apply it to the furrows and holes of Phragmites australis and soybeans.

[0064] (4) The specific steps of field management are as follows: a. Thinning and weeding. The survival rate of Phragmites australis is 100% after the new buds grow out. The soybean seedlings are thinned and weeded when the first to second compound leaves grow out after the seedlings emerge. b. Intertillage and weeding are carried out twice. The first time is on June 21, 2024 when Phragmites australis grows new tillering true leaves. The second time is on July 22, 2024 when Phragmites australis grows 0.5-1 meters. Deep weeding is carried out in combination with topdressing. c. Topdressing is carried out on June 21, 2024, about one month after Phragmites australis is planted. Topdressing is carried out in combination with intertillage and weeding. Urea is applied at a distance of 10-15 cm from the roots of Phragmites australis plants. D. Phragmites australis seedlings must be watered thoroughly on the first day after planting. Water thoroughly once on the 7th day, and then water three times according to the different seasons and soil moisture conditions in different regions. e. Pest and disease control: Phyllostachys reed had no pests, soybean had slight pests, and no pesticide spraying was carried out.

[0065] (5) Harvested reed bamboo and soybeans can be used as feed: reed bamboo will be harvested on August 19, 2024, and dried and stored after harvesting. The height of unintercropped reed bamboo is 2.1 meters, and the weight of a single clump is 1.38 kg; the height of intercropped reed bamboo is 2.60 meters, and the weight of a single clump is 1.76 kg, with a 23.8% increase in height and a 27.5% increase in weight; the height of soybean is 1.23 meters, and the weight of a single plant is 0.0241 kg.

[0066] The yield and economic benefits of reed bamboo and soybean under the two treatments of pure reed bamboo and reed bamboo intercropping with soybean are shown in Table 3. The yield of reed bamboo under the treatment of reed bamboo intercropping with soybean is 2344 kg / mu, which is 27.5% higher than that of pure reed bamboo. The economic benefit under the treatment of reed bamboo intercropping with soybean is 1445 yuan / mu, which is 31% higher than that of pure reed bamboo. It can be seen that reed bamboo intercropping with soybean can effectively increase the yield of reed bamboo and increase economic income.

[0067] Table 3 Yield and economic benefits of Phragmites australis and soybean (Kedou 35) under different treatments

[0068] The crude protein content of pure reed bamboo dry sample is 11.32%, crude fat content is 0.96%, crude fiber content is 35.34%, and crude ash content is 10.14%; the protein content of reed bamboo intercropped sample is 13.43%, crude fat content is 1.54%, crude fiber content is 35.50%, and crude ash content is 9.64%; the protein content of soybean is 15.72%, crude fat content is 0.93%, crude fiber content is 47.82%, and crude ash content is 8.91%. Reed bamboo intercropped with soybean can effectively improve the nutritional content of reed bamboo.

[0069] The performance of soil nutrients under the two treatments of reed bamboo and soybean is shown in Table 4. Under the treatment of reed bamboo intercropping with soybean, the soil organic matter content was 0.66%, the alkaline nitrogen content was 81.25 mg / kg, the available phosphorus content was 8.22 mg / kg, the available potassium content was 217.11 mg / kg, the total colony count was 1990000 cfu / g, the urease activity was 0.44 ng / g, the alkaline phosphatase activity was 1.3 ng / g, the catalase activity was 0.96 ng / g, and the sucrase activity was 1.71 ng / g, which were 3%, 10%, 189%, 8%, 62%, 19%, 16%, 7%, and 14% higher than those of pure reed bamboo. It can be seen that reed bamboo intercropping with soybean can effectively improve the physical and chemical properties of the soil.

[0070] Table 4 Performance of soil nutrients under different treatments

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A planting method for intercropping Phragmites australis and soybeans, characterized in that: Phragmites australis and soybeans are intercropped in a planting row ratio of 1:1-2; the number of Phragmites australis planted is 1 plant / hole; the sowing rate of soybeans is 2-4 seeds / hole; the distance between adjacent Phragmites australis holes and soybean holes is 20-30cm; the distance between adjacent Phragmites australis holes and Phragmites australis holes is 50-100cm; the distance between adjacent soybean holes is 40-60cm.

2. The intercropping method of Phragmites australis and soybean according to claim 1, characterized in that: Phragmites australis and soybeans are sown at the same time.

3. The intercropping method of Phragmites australis and soybean according to claim 2, characterized in that: After winter every year, sowing should be carried out when the ground temperature at 5-10cm of the soil layer reaches above 10℃.

4. The intercropping method of Phragmites australis and soybean according to claim 3, characterized in that: The sowing time is from mid-to-late April to mid-June.

5. The intercropping method of Phragmites australis and soybean according to claim 4, characterized in that: Leave 2-3 seedlings in each soybean hole.

6. The intercropping method of Phragmites australis and soybean according to claim 5, characterized in that: Apply urea and diammonium phosphate after sowing; the application rate of urea is 25±3kg / mu; the application rate of diammonium phosphate is 10±1kg / mu.

7. The intercropping method of Phragmites australis and soybean according to claim 6, characterized in that: Thinning and transplanting are carried out when the soybean seedlings grow the 1st to 2nd compound leaves after emergence.

8. The intercropping method of Phragmites australis and soybean according to claim 7, characterized in that: Weed twice, the first time when the reed grows new tillers and true leaves, and the second time when the reed grows to 0.5-1 meter high; during the first weeding, reseeding should be carried out; during the second weeding, top dressing should be carried out.

9. The intercropping method of Phragmites australis and soybean according to claim 8, characterized in that: Apply urea as topdressing to a distance of 10-15 cm from the roots of Phragmites australis plants, with a topdressing amount of 35-40 kg / mu.

10. The intercropping method of Phragmites australis and soybean according to claim 9, characterized in that: The Phyllostachys reed seedlings must be watered thoroughly on the first day of planting, and watered thoroughly once on the 7th day.

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