【摘要】 在黄潮土地区,土壤有效磷含量往往是不足的,施用磷肥有显著增产效果。磷肥对棉花增产的效应方程为:Y=162.54+1.4335 x-0.00695x²,F=201.7(F_00.1=21.20)。磷肥最佳用量为亩施100斤（过磷酸钙含P₂O₅为10.94%）。施磷与棉花单株结铃数有较好的相关性。更多还原

【Abstract】 In the region of Yellow—Chao soil,the available phosphate content of soil isoften in deficiency.The application of P fertilizer to the cotton plant canrece ire a remarkable effect of increase in Yield.The regression equation is（?）=162.54+1.4335x-0.00695x²,F=201.7^**（F0.01=21.20）.The excellent dosageof ordinary superphosphate（p₂o₅10.94%）is 100 jin per mu.There is a goodcorrelation between the application of p fertilizer and the boll number of cottonplant.更多还原