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推导出了合理施用氮肥的配套计算公式,主要有:平衡施N量=(目标产N量-外源N量)÷N素总回收率,引用以前试验资料,初步验证是成立的.这是正确开展试验、平衡施肥及农产品质量安全的先决条件.
The formulas for the rational application of nitrogen fertilizer are deduced. The main contents are as follows: the amount of N balance = (target N yield - exogenous N) ÷ N total recovery rate, the use of previous test data, preliminary verification is established. Properly carry out tests to balance fertilizer and agricultural products quality and safety preconditions.