关键词: 豫北平原, 豫北平原, 土壤养分, 施肥调查, 豫北平原

Abstract:

The Effects of spraying 1% KCL solution on nitrate content and Nitrogen distribution of rapeseed in initial siliquing stage and harvesting stage, which were studied by using soil cultural experiment. Controlled by Spraying 1.17% K2SO4 solution (Potassium chloride and potassium sulfate solution requirements in the same concentration of potassium) and water, the stems and leaves were sprayed, focus on the back of leafs, try not to spray on petioles, sampling in initial siliquing stage and harvesting stage. Spraying KCL solution every other day for 15 days start from late flowering, results showed that nitrate content in the leafs and stems were markedly reduced, Nitrogen redistributed to silique and rapeseed were efficiently promoted, nitrate reductase activity in the leaf were markedly increased. The differences of the same species which under different treatment are more serious, and the differences of the different species which under the same treatment are more significant.