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以化学方法测定棉花组织的矿质营养籍以诊断植株养分状况的研究最早是由Joham(1951)进行的.30多年以来,经Belousov(1954)、唐秀娟等(1975,1965)、Mackenzie等(1963)以及苏联一些学者的工作,棉花营养诊断研究日益深入,内容广泛,在施肥指导、养分与产量的预测和预控等方面有过许多成功的尝试,有的国家营养诊断服务于生产已经企业化、正规化,且有私立组织.本文试就这一研究予以综述.一、基础工作半定量和速测表明,棉株叶组织的养分含量,以钾最高,氮次之,磷最低.叶组织的养分含量可随施肥量的增加而提高,随植株年龄的增长而下降.在棉花一生中,氮素吸收高峰出现在现蕾一盛花期,该期吸收约占总量的60～70%,磷、钾吸收高峰出现在稍后.棉花对N、P_2O_5、K_2O的吸收比例,与品种特性有关,与研究中的处理有关,与不同条件下的经济产量系数的关系密切.通常南方棉区的经济产量系数低于北方.有资料指出,棉花吸收N:P_2O_5:K_O的比
The first study on the nutritional status of cotton tissues by chemical methods to diagnose the nutritional status of cotton plants was first carried out by Joham (1951) .For more than 30 years, Belousov (1954), Tang Xiujuan et al. (1975, 1965), Mackenzie et al. ) As well as the work of some scholars in the Soviet Union. The research on cotton nutrition diagnosis has been deepening and extensive in content. There have been many successes in such fields as fertilization guidance, nutrient and yield prediction, and pre-control. Some countries’ , Normalization, and private organizations.This paper tries to summarize the research.First, the basic work of semi-quantitative and rapid test showed that the leaves of cotton plant nutrient content, the highest potassium, nitrogen and phosphorus lowest. Of nutrient content increased with the increase of fertilizer amount and decreased with the increase of plant age.In the whole cotton life, the peak of nitrogen absorption appeared in the flowering stage of a bud, which accounted for about 60-70% of the total absorption, The absorption peak of phosphorus and potassium appeared later. The absorption ratio of cotton to N, P_2O_5 and K_2O was related to the characteristics of cultivars and related to the treatments under study, and was closely related to the economic yield coefficient under different conditions. . Economic output coefficient is lower than the North has data indicate that cotton absorbs N: P_2O_5: K_O than