Swamp cabbage to fall the main crossing the pale green leafy vegetables, like, high temperature and high humidity environment not good low temperature resistance, in frost stem leaves die, namely grow warm for 25 to 30 ℃, 10 ℃ below stunted growth. In the winter with the insulation greenhouse cultivation.

Species ***ion Choose swamp cabbage varieties suitable for local production, such as big bone green, sword leaf, green chicken, etc.

Site preparation fertilization Swamp cabbage growth speed, branched, to prevent more, should give sufficient basal. General rotten organic fertilizer rates per acre in 2500-3000 kg, 100 kg, plant ash and soil do after blending strip, strip 20 cm high, 130-150 - cm wide.

Seed treatment Swamp cabbage seed thick and hard, direct seeding germinating slowly, perishable, continuous low temperature rainy weather seeds before seeding to be sprouting. With 30 ℃ warm water first seed 18 to 20 hours, and then wrapped in gauze, at 30 ℃ sprouting in the box, there are more than 50% of the thief can sow seeds.

sow Use of greenhouse cultivation swamp cabbage can realize the anniversary production, anniversary of the supply. Winter cultivation seeding time can be in the second year in October to January, the second year December to march. Seeding, drilling, YongZhongLiang 1.5-2 kg per acre. Cover 1 cm thick fine soil after seeding. Drilling can be open on the surface of the strip, 2-3 cm deep shallow groove groove from 15 cm, the seed evenly within the trench, covering the fine soil again. Strip surface cover sun-shade net after sowing, water spray, sun-shade net is uncovered after emergence.

Temperature and humidity management Winter use of swamp cabbage greenhouse cultivation, low heat, humidity is big, in the long time continuous wet weather is not conducive to plant growth and development in low temperature. Should be sealed after planting greenhouses, guarantee the canopy temperature is higher than the IO ~ C, to prevent freezing injury, but should not be temperature above 35 ℃, to prevent diseases. Relative humidity is high, should be in full sun and high temperature circumstance timely solve the film around the canopy at both ends or ventilation.

Water management Swamp cabbage can be harvested for many times, besides giving sufficient basal to hire top application many times. Seedling can spray per acre 10% 15% diluted human excrement, 1000-1500 kg; When seedlings have 3-4 true leaf, 45% of compound fertilizer for 15 to 20 kg per acre, urea 3-4 kg; Harvest time every once harvested, the compound fertilizer 5-8 kg per mu. Should swamp cabbage water demand is bigger, regular watering, keep the ground moist.

Diseases and pests prevention and cure of diseases mainly include seedling stage damping off and stem rot, more caused by low temperature and humidity, reduce relative humidity can reduce disease, early onset of available antivirus alum 64% evil mildew, manganese zinc wettable powder 500 times liquid or 70% mancozeb wettable powder 500 times liquid spray control. Pest mainly red spider mites, available 73% acetylene mites, ec 1000 times liquid spray control.