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一、长期试验中钾肥对主要作物的平均效应钾肥效果不能用一季作物来衡量,至少要考虑一个轮作周期,最好是超过十年。提供的钾肥试验结果,通常是按试验归纳,而不是以作物归纳的。法国钾肥氮肥贸易公司(SCPA)农学部从布置的钾肥试验中获得了大量结果。然而,要就主要作物的钾肥效果做出总结,可能还要20年。
First, the long-term test of the average potassium effect on the main crops Potash effect can not be used to measure a quarter of crops, at least to consider a rotation cycle, preferably more than ten years. Potassium fertilizer test results provided, usually according to the test induction, rather than crop induction. The Department of Agronomy of the French Potash Fertilizer and Nitrogen Trading Company (SCPA) has obtained a great deal of results from the potash experiment. However, to sum up the potash effect of the main crops, it may take another 20 years.