大白菜种植技术（Planting techniques of Chinese Cabbage）.doc

大白菜种植技术（Planting techniques of Chinese Cabbage） 1, sowing. Sowing is divided into two types: direct seeding and seedling transplanting, which are usually determined by the harvest of the preceding crop. The front crop can be harvested as early as possible, and the soil can be prepared in time, and the direct seeding method can be adopted. Otherwise, the method of raising seedlings and transplanting them is adopted. Direct seeding is 5~6 days later than transplanting. Planting Chinese cabbage generally uses two patterns: high ridge and smooth furrow. High ridge generally rows each ridge, the ridge height of 12~15 cm; flat furrow, two rows of each furrow, the width of the belt depends on the variety. There are two ways to live and seed drill. It is hill or ridge top at a certain spacing point open. Early breed, row spacing 55~60 cm. In 40 ~ 50 cm, 3000 plants per mu, late maturing varieties spacing of 65 ~ 70 cm spacing, 55 ~ 60 cm, about 2500 plants per acre planted. Point 8 ~ 10 cm deep, about 1 ~ 1, 5 ~ 5 cm, each planting 6 grains per mu for 0 - 15 kg. The drill is 5 ~ 10 cm spacing according to the deep ditch, the ditch along the first watering, water seepage, the seeds evenly spread in the trench, and they are 0 - 8 ~ 1 cm thick thin soil. There are about 0. 3 kilograms per mu. Live Chinese cabbage to sprout unearthed, take small Qin pouring water, keep the ground moist and the low surface temperature measures. In the absence of rain, usually on the day of sowing or the next day watering again, in order to make the ridge surface soaked. The third day of sowing watered second times water to help the majority of shoots unearthed. 2 、 seedling management. From the unearthed bud to the rosette stage management. Should the time and seedlings, and in 2 ~ 3 or 4 ~ 5 leaves, the thinning time, and weeds, and weak seedling seedling disease. The 6 leaf (rosette) when seeding, and timely cultivation, to the outer leaf sealing ridge will stop the cultivators, to avoid injur