研究棉田施肥技术,克服用肥盲目性,实行科学施肥,提高棉花单产和施肥效益是一项十分重要的工作。根据省科委棉花协作组的要求,于1986—1989年组织全省主要棉产区的科技工作者开展棉田氮磷配比试验和钾肥肥效的研究。试验采用氮磷二因子四水平和钾肥的回归均匀布点设计,共9个处理。分别在南阳、虞城、临颍与新野等县和太康、延津、通许、荥阳与原阳等县的有关 Studying fertilization techniques in cotton fields, overcoming the blindness of using fertilizers, implementing scientific fertilization and increasing cotton yield and fertilization benefits is a very important task. According to the requirements of the Provincial Science and Technology Commission of Cotton Cooperation Group, in 1986-1989, scientists and technicians in major cotton producing areas in the province conducted research on the ratio of nitrogen and phosphorus in cotton fields and the efficiency of potash fertilizer. Test using nitrogen and phosphorus two factors and four levels of potassium return uniform distribution design, a total of nine treatment. Respectively in Nanyang, Yucheng, Linying and Xinye counties and Taikang, Yanjin, Tong Xu, Yang and Yuanyang counties and other relevant