白菜,甘蓝养分平衡施肥技术研究

通过应用养分平衡法对白菜，甘蓝施肥技术的研究试验，得出了高、中、低不同土壤肥力条件下，应用早熟，中熟甘蓝和白菜的土壤空白产量确定其最高产量的回归方程，早熟，中熟甘蓝和白菜的产量随土壤速效养分含量增加而提高，土壤速效养分校正系数随土壤速效养分含量增加而变小，在不同肥力土壤上，校正系数是不同的，它不是一个固定不变的数值。

A Study on Nutrition Balance Fertilization Technology for Chinese Cabbage and Cabbage

In the study, the method of nutrition balance was employied. We got 7 regression equations of open and mixiurn yield for early-muturity and middle-muturity cabbage and Chinese cabbage under various land fertilities, contents of nitrogen, phosphafe and potassium in cabbage and Chinese cabbage, 27 adjusted coefficients of alkalihydrolysis nitrogen, rapid-available phosphate and potassium for early-muturity and middle-muturity cabbaga under various land fertilities, rates of fertilizer utilization by cabbage and Chinese cabbage, and critical values of available boron in cabbage and Chinese cabbage fields. Thus the mixium yield could be infered with open yield based on land fertility. With the rise of rapid-available nutrition levels, yield of early-muturity and middle-muturity cabbage and Chinese cabbage increased while adjusted coefficients decreased. The adjusted coefficiences changed with the variation of land fertility.