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黑壚土是甘肃省东部主要土壤类型,也是冬小麦的主要产区。当地农民对冬小麦素有施肥习慣,但近年来由于施肥水平不断提高和施肥种类逐漸增多,从而产生了在这种土壤上冬小麦究竟施用什么肥料为最合适的問題。为此,1963年及1964年,在土壤条件基本相同的不同地块上,进行了8个三要素肥效試驗,以探寻黑壚土对冬小麦的三要素自然供应情况。
Black soil is the main soil type in eastern Gansu Province, is also the main producing areas of winter wheat. Local farmers are known to apply winter wheat fertilizers, but in recent years due to the continuous improvement of fertilizer levels and types of fertilizers gradually increased, resulting in what kind of fertilizer on the soil in which the most appropriate application of winter wheat is the most appropriate issue. For this reason, in 1963 and 1964, eight three-factor fertilizer efficiency tests were conducted on different plots with basically the same soil conditions to explore the natural supply of three elements of black mound soil to winter wheat.