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碳酸氢铵是一种速效性氮肥,能被作物直接吸收利用。但它的稳定性差,挥发性强,作表层撒施时,氮肥利用率一般在30％以下。为了提高其利用率,我们在早稻合理施用碳酸氢铵取得显著效果的基础上,1973年又与生产资料部门和一些公社农科所配合,进行了提高晚稻施用碳酸氢铵肥效的多点试验。结果表明:在用量相等的情况下,施用得法的比表层撒施的要多增产稻谷10—20％。现在根据试验结果,将我们认为较好的施用方法简介如下。
Ammonium bicarbonate is a quick-acting nitrogen fertilizer that can be absorbed directly by the crop. However, its stability is poor, volatile, when applied to the surface, nitrogen use efficiency is generally below 30%. In order to improve its utilization rate, based on the rational application of ammonium bicarbonate in early rice, we cooperated with the means of production and some communes and agroscopies in 1973 to conduct multi-point experiments to improve the efficiency of applying ammonium bicarbonate in late rice. The results showed that in the case of the same amount of application, the yield of rice should be increased by 10-20% compared with that of the top layer applied. Now based on the test results, we think the best method of application is as follows.