根据田间试验结果计算出各种施肥技术参数,提出氮磷钾丰缺指标,建立不同肥力水平的氮磷钾肥料效应模型,以“养分归还学说”为理论依据,以目标产量确定施氮量,结合我县的耕地地力养分丰缺状态,确定磷钾养分的施用量,初步建立我县油菜施肥指标体系。根据我县油菜目前的产量水平,纯氮的推荐施用量一般为6.8~12 kg,K2O的推荐用量为2.9~5.3 kg,P2O5的推荐用量为3.2~7.2 kg。
According to the results of field experiments, various fertilization technical parameters were calculated, and the indexes of N, P and K were put forward. The effect models of N, P and K fertilizer with different fertility levels were established. The Fertilization Index System of rape in our county was established. According to the current yield level of rape in our county, the recommended amount of pure nitrogen is generally 6.8~12 kg, the recommended amount of K2O is 2.9~5.3 kg, and the recommended amount of P2O5 is 3.2~7.2 kg.