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玉米是我区的主要粮食作物之一。为了探索夏玉米高产稳产最合理的氮磷钾用量及适宜的密度,1977年在施用有机肥料的基础上,对夏玉米的不同密度及氮磷钾化肥不同用量,以正交法进行了试验,并设置了氮肥单因子辅助试验,现将试验结果整理如下: 一、试验设计正交试验共选用四个因素,即氮、磷、钾化肥及密度,分别以N、P、K、V表示,每个因素又分三个水平。选用正交表L_9(3~4)。试验的因素与水平表头设计及试验方
Corn is one of the main food crops in my area. In order to explore the most suitable yield and suitable density of summer maize with high and stable yield, on the basis of applying organic fertilizer in 1977, different density of summer maize and different dosage of NPK fertilizers were tested by orthogonal test, And set up nitrogen fertilizer single factor auxiliary test, the test results are summarized as follows: First, the experimental design Orthogonal experiment were selected four factors, namely, nitrogen, phosphorus and potassium fertilizer and density, respectively, N, P, K, Each factor is divided into three levels. Use orthogonal table L_9 (3 ~ 4). Test factors and level meter design and test side