CN112243823A - Crop rotation planting method for onions - Google Patents
Crop rotation planting method for onions Download PDFInfo
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- CN112243823A CN112243823A CN202011070948.6A CN202011070948A CN112243823A CN 112243823 A CN112243823 A CN 112243823A CN 202011070948 A CN202011070948 A CN 202011070948A CN 112243823 A CN112243823 A CN 112243823A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/35—Bulbs; Alliums, e.g. onions or leeks
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
- A01C1/06—Coating or dressing seed
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/25—Root crops, e.g. potatoes, yams, beet or wasabi
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/02—Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a crop rotation planting method of onions, relates to the field of agriculture, and provides a crop rotation method of onions and potatoes, which can prevent late blight and improve onion seed selection and irrigation modes to improve onion yield. According to the method, the mode of crop rotation of the onions and the potatoes is adopted, the potatoes are continuously planted on the soil for planting the onions, the generation of disease bacteria in the soil can be reduced, and therefore the probability of late blight in the potato planting in the next year is reduced. By the onion variety breeding, the variety with higher purity and property can be obtained, the occurrence of diseases is effectively reduced, and the yield is improved. The invention adopts the low-pressure drip irrigation belt for water-saving irrigation to carry out drip irrigation, can effectively save water, controls the drip irrigation quantity, can ensure sufficient water quantity, ensures the growth of onions, and can control watering to prevent excessive growth. The adopted drip irrigation tape can realize the uniformity of water outlet speed and irrigation uniformity. The invention is applied to the field of crop planting.
Description
Technical Field
The invention relates to the field of agriculture, in particular to a crop rotation planting method for onions.
Background
The onion is also called onion bulb, liliaceae, allium, is 2-year-old herbaceous plant, the row spacing of the plant is generally 60 multiplied by 30cm, the plant grows vertically, the height is about 1.5m, a pseudostem is sleeved by a leaf sheath, an umbrella-shaped inflorescence is provided with 200-1300 flowers, and the flowers are pollinated in a different way and are encapsulated. The mature seeds are shield-shaped and black, the thousand seeds weigh 3-5 g, and the service life is one year. The onion is widely distributed in China, cultivated in various places of south and north, and the planting area is continuously enlarged, so that the onion is one of the main vegetables planted in China at present.
Potato (academic name: Solanum tuberosum L.) belongs toSolanaceaeThe plant growth regulator is a plant growth regulator for annual herbaceous plants,tuber tuberCan be supplied toEating the foodIs of the fourth greatest importance globallyGrain cropNext toWheat (Triticum aestivum L.)Rice, andcorn (corn). The potato late blight is caused byPhytophthora infestansCause, occur atPotatoA disease of (1). This disease is mainly harmful to potato stems, leaves and tubers. Buds and berries can also be infected. The potato late blight is one of the main diseases of potatoes, the disease is common in most areas in the middle and north of China, and the loss degree of the disease is different according to different climatic conditions of each area. Under conditions suitable for disease epidemics, plants die prematurely, which can result in 20-40% yield loss. The disease damage is reduced due to the popularization and the application of disease-resistant varieties, but the loss caused by epidemic years is still large. The disease occurrence is facilitated in the weather of heavy fog and dew in the morning and evening or continuous rainy days, and the condition that the disease prevalence is at the temperature of 10-25 ℃ and the relative humidity of more than 75 percent is taken as the disease prevalence condition; the low-lying, over-dense plants, application of nitrogen fertilizer, excessive field relative humidity or weak plant growth and the like are also beneficial to the occurrence of the disease.
Potato late blight is a common hazard of potatoes. The method for preventing and treating the diseases mainly comprises the measures of chemical prevention, agricultural prevention, biological prevention and the like, and the prevention is carried out in a rotation mode less. Onion crop rotation is reported more, but the onion crop rotation is not related to potato crop rotation for preventing late blight.
The onion seed picking period is long, the service life of the onion seed is short, the annual change of the seed production is large, the planting area is affected due to the instable seed yield in the production, the quality of the seed is directly and closely related to the economic benefit of a producer, and therefore how to adopt a proper seed picking method and technology is crucial to the stable yield and the quality improvement of the onion seed. Further improvements are needed in seed selection of onions. Furthermore, the onion irrigation has a great influence on the growth of the onions, different irrigation modes are needed at different times, and particularly regular drip irrigation is needed in the onion growth period to keep the vigorous growth state.
Disclosure of Invention
The invention aims to provide a method for crop rotation of onions and potatoes to prevent late blight and improve onion seed selection and irrigation to improve onion yield.
The invention relates to a crop rotation planting method of onions, which is carried out according to the following steps:
selecting water-retaining and fertilizer-retaining fertile land blocks, and applying 3000-5000 kg of decomposed and sterilized organic fertilizer, 100 kg of potassium sulfate compound fertilizer and 10-30 kg of urea per 6 mu of land; then ploughing, wherein the ploughing depth is 20-25 cm, ridging and bed-making are carried out, the ridge width is 30-40 cm, the width of a bed surface is 180 cm, and the planting bandwidth is 210-220 cm;
selecting the screened onions as varieties to be sown, spraying 1kg of field insects per 6 mu of land before sowing, raking and pressing, and spraying 100-150 ml of field insects;
step three, sowing 45 days before the local average temperature is reduced to 10-15 ℃, wherein the sowing amount per mu is 4-5 kg, sowing on the ridge surface, and covering soil;
selecting sunlight-free direct irradiation time, planting at a planting depth of 2-5 cm, and supplementing water according to the state of the seedlings after planting to ensure that the seedlings do not wither and the ground is not dried;
fifthly, pouring sealing water when the soil is frozen at daytime and night, watering for 10-20 days in a squatting mode in the next year, and fertilizing; film-covering and drip-irrigating, drip-irrigating for 1 time every 8-9 days to make the soil dry and wet, and loosening the soil after squatting;
sixthly, stopping watering 7-8 days before harvesting; when the pseudostem loses water and becomes soft, more than 75 percent of plants are planted and lodged, and the outer-layer scale is in grass quality, the pseudostem is harvested;
seventhly, ploughing the harvested land, and spraying 25% of multi-bacteria for 500 times of flexibility; and (3) airing the ploughed land until the surface soil is dry, applying 1000 kg/mu of farmyard manure, applying 50kg of compound microbial fertilizer, 40kg of phosphate fertilizer, 10kg of potash fertilizer and 20kg of urea per mu, sowing after the potatoes are mixed with the pesticide in the last 9 th month, and performing field management until the potatoes are harvested.
Further, the screened onions are processed by the following steps: the onion is sown in 9-10 months in the first year, and the seedlings are exposed or stored for overwintering in winter; harvesting large bulbs in summer in the next year, selecting individuals with deep purple outer skins, good compactness, no diseases, insect pests, mechanical damage and 3-4 cm transverse diameter from the large bulbs, eliminating susceptible plants after storage, planting mother balls in spring in the third year in northeast China, harvesting seeds in 6 months, and taking 21-23 months from sowing to harvesting the seeds; and obtaining the screened onion.
Further, the tectorial membrane burette in the fifth step adopts water conservation irrigation to drip irrigation with low pressure drip irrigation zone, water conservation irrigation with low pressure drip irrigation zone's main part be the tubulose, be provided with the separate layer along main part axial direction in the drip irrigation zone, the separate layer separates the inner chamber of drip irrigation zone for the first lumen on upper portion and the second lumen of lower part, different inlet tubes are connected respectively to the second lumen of first lumen and lower part, be provided with a plurality of ring channels around the outer periphery in the main part of drip irrigation zone, be provided with the weeping hole on the lower part pipe wall of second lumen in the ring channel, the separate layer middle part is provided with first through-hole, the separate layer end is provided with the second through-hole, the drip.
Further, the water dripping hole is a through hole penetrating through the wall of the second tube cavity.
Further, the pipe cap is sleeved at the rear end of the drip irrigation tape and is welded with the drip irrigation tape.
Further, the depth of the annular groove is one half of the thickness of the pipe wall of the drip irrigation tape.
Furthermore, a third through hole is formed in the lower pipe wall of the second pipe cavity corresponding to the first through hole, an annular belt surrounding the surface of the drip irrigation tape covers the surface of the third through hole, and the annular belt is bonded with the surface of the drip irrigation tape.
Further, the medicament seed dressing in the seventh step is to uniformly seed dressing by adding 4% -8% of thiophanate methyl into plant ash.
Further, before seed dressing with the medicament, soaking the potatoes in formalin solution with the mass percent of 0.2% for 5-10 minutes, tightly covering the potatoes with a film, tightly soaking the potatoes for 2 hours, spreading the potatoes out for natural airing, and when cutting the potatoes into blocks, soaking the potatoes in 75% alcohol by volume or 0.1% potassium permanganate solution by mass percent for 5-8 minutes by using a cutter.
The invention has the following beneficial effects:
according to the method, the mode of crop rotation of the onions and the potatoes is adopted, the potatoes are continuously planted on the soil for planting the onions, the generation of disease bacteria in the soil can be reduced, and therefore the probability of late blight in the potato planting in the next year is reduced. By the onion variety breeding, the variety with higher purity and property can be obtained, the occurrence of diseases is effectively reduced, and the yield is improved. The invention adopts the low-pressure drip irrigation belt for water-saving irrigation to carry out drip irrigation, can effectively save water, controls the drip irrigation quantity, can ensure sufficient water quantity, ensures the growth of onions, and can control watering to prevent excessive growth. The adopted drip irrigation tape can realize the uniformity of water outlet speed and irrigation uniformity.
According to the invention, the onion and the potato are adopted for crop rotation, so that the potato late blight can be prevented while the onion yield is ensured, and the application prospect is wide.
Drawings
FIG. 1 is an axial cross-sectional view of the low pressure drip irrigation tape for water saving irrigation of the present invention;
fig. 2 is a radial cross-sectional view of the low pressure drip irrigation tape for water saving irrigation of the present invention.
Detailed Description
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
To make the objects, aspects and advantages of the embodiments of the present invention more apparent, the following detailed description clearly illustrates the spirit of the disclosure, and any person skilled in the art, after understanding the embodiments of the disclosure, may make changes and modifications to the technology taught by the disclosure without departing from the spirit and scope of the disclosure.
The exemplary embodiments of the present invention and the description thereof are provided to explain the present invention and not to limit the present invention.
Example 1
The crop rotation planting method of the onions in the embodiment is carried out according to the following steps:
selecting water-retaining and fertilizer-retaining land blocks and fertile land blocks in Lanxi county of Heilongjiang province, and applying 3000-5000 kg of decomposed and sterilized organic fertilizer, 100 kg of potassium sulfate compound fertilizer and 20kg of urea per 6 mu of land; then ploughing, ploughing to a depth of 25 cm, ridging and ridging, wherein the ridge width is 40 cm, the ridge surface width is 180 cm, and the planting bandwidth is 210 cm;
selecting screened onions (the variety is Aizhihuang, and the black registration is 2005033) as a variety to be sown, scattering 1kg of euproctis sinensis per 6 mu of land before sowing, raking, pressing, and spraying 100 ml of euproctis sinensis;
step three, sowing 45 days before the local average air temperature is reduced to 15 ℃, wherein the sowing amount per mu is 5 kilograms, sowing on the surface of the ridge, and covering soil;
selecting sunlight-free direct irradiation time, planting at a planting depth of 5 cm, and supplementing water according to the state of the seedlings after planting to ensure that the seedlings do not wither and the ground is not dried;
fifthly, pouring sealing water when the soil is frozen at daytime and night, watering for 15 days in a squatting mode in the next year, and fertilizing; covering a film for drip irrigation, drip irrigation for 1 time every 8 days to make the soil dry and wet, and loosening the soil after squatting;
sixthly, stopping watering 8 days before harvesting; when the pseudostem loses water and becomes soft, more than 75 percent of plants are planted and lodged, and the outer-layer scale is in grass quality, the pseudostem is harvested;
seventhly, ploughing the harvested land, and spraying 25% of multi-bacteria for 500 times of flexibility; and (3) airing the ploughed land until the surface soil is dry, applying 1000 kg/mu of farmyard manure, applying 50kg of compound microbial fertilizer, 40kg of phosphate fertilizer, 10kg of potash fertilizer and 20kg of urea per mu, sowing after dressing the potatoes with the pesticide in the last 9 th month (Dongnong 303), and performing field management until the potatoes are harvested.
The screened onions are carried out in the following way: the onion is sowed in 10 months in the first year, and the seedlings are exposed or stored for overwintering in winter; harvesting the large bulbs in summer in the next year, selecting individuals with deep purple outer skins, good compactness, no diseases, insect pests, no mechanical damage and 3-4 cm transverse diameter from the large bulbs, eliminating susceptible plants after storage, planting mother balls in spring in the third year in northeast China, harvesting seeds in 6 months, and obtaining the screened onions after sowing to harvesting the seeds for 23 months.
The film-coated dropper in the fifth step adopts the low-pressure drip irrigation tape for water-saving irrigation to carry out drip irrigation, the main body of the low-pressure drip irrigation tape for water-saving irrigation is tubular, a separation layer 8 is arranged in the drip irrigation tape along the axial direction of the main body, the separation layer 8 separates the inner cavity of the drip irrigation tape into a first tube cavity 1 at the upper part and a second tube cavity 2 at the lower part, the first tube cavity 1 and the second tube cavity 2 at the lower part are respectively connected with different water inlet pipes, a plurality of annular grooves 9 surrounding the outer circumferential surface are formed in the main body of the drip irrigation tape, water dripping holes 3 are formed in the tube wall of the lower part of the second tube cavity 2 in the annular grooves 9, a first through hole 5 is formed in the middle of.
The main body of the low-pressure drip irrigation tape for water-saving irrigation of the embodiment is tubular, a separation layer 8 is arranged in the drip irrigation tape along the axial direction of the main body, the separation layer 8 divides the inner cavity of the drip irrigation tape into a first tube cavity 1 at the upper part and a second tube cavity 2 at the lower part, the first tube cavity 1 and the second tube cavity 2 at the lower part are respectively connected with different water inlet pipes, a plurality of annular grooves 9 surrounding the outer circumferential surface are arranged on the main body of the drip irrigation tape, the depth of each annular groove 9 is one half of the tube wall thickness of the drip irrigation tape, a water dripping hole 3 is arranged on the lower tube wall of the second tube cavity 2 in each annular groove 9, a first through hole 5 is arranged in the middle of each separation layer 8, a second through hole 7 is arranged at the tail end of each separation layer 8, a pipe cap 10 is arranged at the rear end of the drip irrigation tape, the pipe cap 10 is sleeved on the rear end of the drip, the ring belt 6 is adhered to the surface of the drip irrigation tape.
When the low-pressure drip irrigation tape for water-saving irrigation is used, the first tube cavity 1 and the second tube cavity 2 at the lower part are respectively connected with different water inlet pipes, so that water is respectively supplied, the water inlet of the second tube cavity 2 is used for supplying water to the front section of the drip irrigation tape, the water inlet in the first tube cavity 1 enters the second tube cavity 2 through the first through hole 5 and the second through hole 7 and is used for supplying water to the rear section of the drip irrigation tape, and the water pressure in the second tube cavity 2 is balanced as the first tube cavity 1 is communicated with the second tube cavity 2; therefore, water supply respectively reduces the water supply distance, and then reduces water supply end water pressure (the first lumen anterior segment does not discharge water and therefore does not need to improve water supply pressure when supplying water remotely), so that the water outlet speed and the far end of the drip hole 3 close to the water supply end are close, and the uniformity of the water outlet speed and the uniformity of irrigation are improved. The drip hole 3 is positioned in an annular groove 9 on the drip tape main body, the annular groove 9 is used for guiding water, and when the orientation of the outlet of the drip hole 3 is changed, the annular groove 9 can guide the water outlet of the drip hole 3 to the bottom of the drip tape and finally drip.
The dripping hole 3 is a through hole penetrating through the pipe wall of the second pipe cavity 2.
The pipe cap 10 is sleeved at the rear end of the drip irrigation tape and is welded with the drip irrigation tape.
The depth of the annular groove 9 is one half of the thickness of the tube wall of the drip irrigation tape.
And a third through hole 4 is formed in the lower pipe wall of the second pipe cavity 2 corresponding to the first through hole 5, an annular belt 6 surrounding the surface of the drip irrigation tape covers the surface of the third through hole 4, and the annular belt 6 is adhered to the surface of the drip irrigation tape.
And seventhly, uniformly mixing the seeds with the medicament by adding 4-8% of thiophanate methyl into the plant ash.
Before seed dressing, soaking the potatoes in formalin solution with the mass percent of 0.2% for 5-10 minutes, tightly covering the potatoes with a film, tightly covering the potatoes for 2 hours, spreading the potatoes out, naturally airing the potatoes, and when cutting the potatoes into blocks, soaking the potatoes in 75% alcohol by volume or 0.1% potassium permanganate solution by mass percent for 5-8 minutes by using a cutter.
Comparative example 1
In this example, the screened onions of example 1 were not used for sowing, but the empty yellow variety onion was used directly for sowing. The rest is the same as in example 1.
Comparative example 2
In the embodiment, drip irrigation is not carried out by adopting the low-pressure drip irrigation tape for water-saving irrigation in the embodiment 1, and a direct watering mode is adopted. The rest is the same as in example 1.
Comparative example 3
In the embodiment, the mode of crop rotation of onion and potato is not adopted, and the potato of the embodiment 1 is directly planted.
After the test, the onion yield per mu in the first year of the embodiment 1 is 5813kg, the onion yield per mu in the second year is 5907kg, and the onion yield per mu in the third year is 5986 kg. 9.7% of the potatoes planted in the control example 3 had late blight after the onion harvest in the first year, while 5.4% of the potatoes planted in the control example 3 had late blight after the onion harvest in the first year by the method of example 1, and the occurrence rate of the potato late blight in the control example 1 was reduced by 44.3% compared with that in the control example 3 after the first year of crop rotation.
Under the conditions of the same irrigation amount and the same irrigation time of the control example 2 and the example 1, the first-year yield per mu of the onion of the control example 2 is 5321kg, which is reduced by 8 percent compared with the example 1.
Claims (9)
1. The crop rotation planting method of the onions is characterized by comprising the following steps of:
selecting water-retaining and fertilizer-retaining fertile land blocks, and applying 3000-5000 kg of decomposed and sterilized organic fertilizer, 100 kg of potassium sulfate compound fertilizer and 10-30 kg of urea per 6 mu of land; then ploughing, wherein the ploughing depth is 20-25 cm, ridging and bed-making are carried out, the ridge width is 30-40 cm, the width of a bed surface is 180 cm, and the planting bandwidth is 210-220 cm;
selecting the screened onions as varieties to be sown, spraying 1kg of field insects per 6 mu of land before sowing, raking and pressing, and spraying 100-150 ml of field insects;
step three, sowing 45 days before the local average temperature is reduced to 10-15 ℃, wherein the sowing amount per mu is 4-5 kg, sowing on the ridge surface, and covering soil;
selecting sunlight-free direct irradiation time, planting at a planting depth of 2-5 cm, and supplementing water according to the state of the seedlings after planting to ensure that the seedlings do not wither and the ground is not dried;
fifthly, pouring sealing water when the soil is frozen at daytime and night, watering for 10-20 days in a squatting mode in the next year, and fertilizing; film-covering and drip-irrigating, drip-irrigating for 1 time every 8-9 days to make the soil dry and wet, and loosening the soil after squatting;
sixthly, stopping watering 7-8 days before harvesting; when the pseudostem loses water and becomes soft, more than 75 percent of plants are planted and lodged, and the outer-layer scale is in grass quality, the pseudostem is harvested;
seventhly, ploughing the harvested land, and spraying 25% of multi-bacteria for 500 times of flexibility; and (3) airing the ploughed land until the surface soil is dry, applying 1000 kg/mu of farmyard manure, applying 50kg of compound microbial fertilizer, 40kg of phosphate fertilizer, 10kg of potash fertilizer and 20kg of urea per mu, sowing after the potatoes are mixed with the pesticide in the last 9 th month, and performing field management until the potatoes are harvested.
2. The onion crop rotation planting method as claimed in claim 1, wherein said selected onions are selected by the following method: the onion is sown in 9-10 months in the first year, and the seedlings are exposed or stored for overwintering in winter; harvesting large bulbs in summer in the next year, selecting individuals with deep purple outer skins, good compactness, no diseases, insect pests, mechanical damage and 3-4 cm transverse diameter from the large bulbs, eliminating susceptible plants after storage, planting mother balls in spring in the third year in northeast China, harvesting seeds in 6 months, and taking 21-23 months from sowing to harvesting the seeds; and obtaining the screened onion.
3. A crop rotation planting method of onions according to claim 1, characterized in that the film-coated dropper in the fifth step is drip-irrigated by using a low-pressure drip irrigation tape for water conservation irrigation, the main body of the low-pressure drip irrigation tape for water conservation irrigation is tubular, a separation layer (8) is arranged in the drip irrigation tape along the axial direction of the main body, the separation layer (8) divides the inner cavity of the drip irrigation tape into a first tube cavity (1) at the upper part and a second tube cavity (2) at the lower part, the first tube cavity (1) and the second tube cavity (2) at the lower part are respectively connected with different water inlet pipes, the main body of the drip irrigation tape is provided with a plurality of annular grooves (9) surrounding the outer circumferential surface, the lower tube wall of the second tube cavity (2) in the annular grooves (9) is provided with water dripping holes (3), the middle part of the separation layer (8) is, the rear end of the drip irrigation belt is provided with a pipe cap (10).
4. A crop rotation method of onions according to claim 3, characterized in that said weep holes (3) are through holes penetrating the wall of the second lumen (2).
5. A crop rotation planting method of onions according to claim 3, characterized in that the cap (10) is sleeved on the rear end of the drip irrigation tape and welded with the drip irrigation tape.
6. A crop rotation method of onions according to claim 3, wherein the depth of the annular groove (9) is half of the thickness of the drip tape tube wall.
7. A crop rotation planting method for onions according to claim 3, characterized in that the lower tube wall of the second tube cavity (2) corresponding to the first through hole (5) is provided with a third through hole (4), the surface of the third through hole (4) is covered with a ring belt (6) surrounding the surface of the drip irrigation tape, and the ring belt (6) is adhered to the surface of the drip irrigation tape.
8. The crop rotation planting method of onions according to claim 1, wherein the medicament seed dressing of step seven is a uniform seed dressing by adding 4% -8% thiophanate methyl to plant ash.
9. The crop rotation planting method of onions according to claim 1 or 8, characterized in that before seed dressing, the potatoes are soaked in 0.2% by mass of formalin for 5-10 minutes, then tightly covered with a film, tightly planted for 2 hours, spread out and naturally dried, and when cutting, a cutter needs to be soaked in 75% by volume of alcohol or 0.1% by mass of potassium permanganate for 5-8 minutes.
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