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我们以陆地棉品种为材料,探讨不同肥料、不同施用量与亩产量之间的变化关系,为大面积生产提供科学的施肥依据。试验从82年开始,连续两年,现总结如下:一、材料与方法供试品种为“湘4108”。试验地为冲积土壤。冬播油菜,三月二十七日翻耕作基肥。棉花移栽前测定,土壤0～20厘米有机质含量1.895%,全氮0.203%,全磷0.139%。棉花于4月29日播种(育苗),5月15日移栽,每亩3300株。采用三元二次正交旋转回归设计,共设23个小区。其中:m_0=8,
Upland cotton varieties as materials, we explore different fertilizers, different application rates and the relationship between the yield per mu, for large-scale production to provide a scientific basis for fertilization. Test from 82 years, for two consecutive years, are summarized as follows: First, materials and methods for the test varieties as “Hunan 4108.” Experiment to alluvial soil. Winter sowing rape, March 27 for basal fertilizer. Cotton transplanting before the determination of 0-20 cm soil organic matter content of 1.895%, 0.203% of total nitrogen, total phosphorus 0.139%. Cotton was planted on April 29 (nursery) and transplanted on May 15 with 3300 plants per mu. Using ternary quadratic orthogonal rotation regression design, a total of 23 cells. Where: m_0 = 8,