黑龙江省春小麦氮磷肥深施效应研究

Studies on the Effect of N?P Deeply Dressing on Spring Wheat in Heilongjiang Province

通过研究 ,确定出在一定地力、一定产量水平上 ,春小麦合理的肥料结构 ;肥料投入结构 ;深施化肥、表施化肥的不同肥料效应 ;最高、经济施用量。从而为春小麦肥料施用方法及适宜范围 ,缩小其在肥料投入产出关系上的差额 ,维持土体养分平衡 。

Through the experiment, we determinated the reasonable and input structure of fertilizer in sping wheat Different effects of fertilizer dressed deeply or shallow and highest and economical amount of fertilizer under certain fertility of soil and yield level. This result can supply theoritical base and production model for dressing method of fertilizer and reasanable range, lessening the difference between input and output, maintaining the balance among factors in soil and establishing fertilizer dressing system of different yield area with different fretility of soil