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用生物指标测定烟田施肥,方法简单,便于推广,现将试验结果初报如下,供参考.一生物指标与烟田的关系(一)生物指标的确定可供选择的生物指标很多.我们选用群众熟悉、产量稳定的小麦产量作为烟田施肥的考虑指标.即小麦产量分为200-300斤;300-400斤;400-500斤;500-600斤四个标准.这四种小麦产量的土壤氮磷钾含最如下:
Determination of biological indicators of tobacco field fertilization, the method is simple, easy to promote, the test results are reported as follows, for reference. A biological index and the relationship between tobacco (A) Determination of biological indicators There are many biological indicators to choose from. People familiar with the yield stable wheat yield as a tobacco field fertilization consideration index, that is, wheat yield is divided into 200-300 kg; 300-400 kg; 400-500 kg; 500-600 kg four standards of these four kinds of wheat yield Soil nitrogen, phosphorus and potassium with the following: