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氮是棉花所必需的大量元素之一。在生产上,氮肥的施用量大,但利用率不高,致使植棉成本增加,效益下降。为了提高氮肥效,多年来,国内外学者曾进行过大量的研究,对指导棉花合理施肥起到了很大的作用。需肥特性是棉花的遗传特性之一,不同品种由于其长势、熟性等的差异,其对氮素吸收、利用也存在着差异。为了更科学地指导施肥,我们选择了几个曾在山东省种植面积较大或生育特性差异较大的品种,对其氦素营养效率进行了比较研究,并参考国内外的研究结果,提出了氮素利用效率的分级标准,供进行棉花节肥育种和节肥栽培时参考。
Nitrogen is one of the many elements essential for cotton. In production, the application of nitrogen fertilizer, but the utilization rate is not high, resulting in increased cost of cotton, the benefits decline. In order to improve the efficiency of nitrogen fertilizer, many scholars at home and abroad have conducted a great deal of research over the years, which has played a very important role in guiding the reasonable fertilization of cotton. Fertility characteristics of cotton is one of the genetic characteristics of different varieties due to its growth, maturity and other differences, its absorption of nitrogen, there are also differences. In order to guide fertilization more scientifically, we selected several cultivars with larger planting areas or different fertility characteristics in Shandong Province, and compared their efficiency of helium nutrition with reference to the domestic and international research results. Nitrogen utilization efficiency of the grading standards for the fiber section of cotton breeding and fertilizer section for reference.