Due to its high yield and high price, the winter and spring cucumbers in greenhouses are now in the grafting period, and certain preparation work is required before planting.
( 1 ) Covering the shed film and shed disinfection, cover the shed film one month before planting, and disinfect the shed , disinfection can use dichlorvos 200 ml, add 1.5-2 kg of sulfur , mix with the sawdust to ignite, swell 1 - 2 days, can effectively kill the eggs in the shed. For the sheds where the root-knot nematode is more powerful, it is also possible to apply 80 kg of lime nitrogen per mu and mix well.
( 2 ) Site preparation and application of base fertilizer: The base fertilizer is mainly organic fertilizer, and 10,000 kilograms of fully decomposed organic fertilizer is applied per mu, and 40 cm deep is mixed. It can also be applied to fermented decayed grass, wheat straw, rice husk and other organic matter. The best measure is to apply straw bioreactor technology, which can effectively improve ground temperature, increase soil organic matter, improve soil environment, reduce disease occurrence, improve product quality, and increase production.
( 3 ) Bed and mulch: In winter greenhouse cultivation of cucumber should be a high bed, and adopt drip irrigation or submerged dark film method. The bed is 1.2 meters wide and 15 cm high , and is covered by plastic film. It is also possible to first apply the film after planting.
(4) determine the colonization period: winter - spring cucumber in general to early December planting in late November. 　
( 5 ) Colonization method and density: 3,500 plants per mu are cultivated . The planting seedlings should be strictly screened, and the seedlings, weak seedlings and grafted unqualified seedlings should be removed. The wells should be planted at a distance of 28-30 cm, the seedlings should be implanted in the holes, the water should be poured, and then the mulch film should be covered.
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Source: Farmers Daily
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