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关于棉花体内氮碳变化规律及其指标用于指导施肥的可能性,我国研究者有过报导.但在某一气候、土壤和生产条件下,棉花获得一定产量的叶片氮碳诊断指标则见诸甚少.在农牧渔业部的支持下,我们从1983年起,开始对长江中游地区亩产150～200公斤籽棉的经济有效施用氮肥的综合诊断指标进行研究.本文是1984年研究不同氮水平对棉花叶片全氮、非蛋白氮和可溶性糖影响的小结,并指出了用以指导棉花经济施用氮肥的临界指标.一、试验材料和方法本试验分盆栽和田间两部分.盆栽试验在校内进行,供试土壤为狮子山肥力水平较高的面黄土,有机质
On cotton in vivo changes of nitrogen and carbon index used to guide the possibility of fertilization, researchers in China have been reported.But in a climate, soil and production conditions, cotton yield certain yield of nitrogen and carbon diagnostic indicators are seen With little support from the Ministry of Agriculture, Animal Husbandry and Fisheries, we started in 1983 to begin the comprehensive diagnostic indicator of the economic and effective application of nitrogen fertilizer per acre 150 kg ~ 200 kg seed cotton in the middle reaches of the Yangtze River .This paper is to study the different nitrogen levels Summary of the effects of total nitrogen, non-protein nitrogen and soluble sugar on cotton leaves, and pointed out the critical index to guide the economic application of nitrogen fertilizer in cotton.Materials and Methods The experiment was divided into two parts: potting and field.The pot experiment was carried out in the school , For the soil test for the Lion Rock high level of surface loess, organic matter