为了全面地满足满农作物在各个发育期中对土壤营养元素和空气营养元素的需要,也就是为了获得丰产,研究植物营养的理论基礎就成为农作物生理学首要的问题。为了提高棉花的收获量,必须运用正确的植物根系营养,灌溉棉业中在这方面已经作了相当够的工作,但是,摆在研究者面前的问题还远未得到解决。不能将营养制度僅僅归结为植物在生长期中营 In order to fully meet the needs of soil nutrients and air nutrients in all developmental stages of full-scale crops, that is, to achieve high yield, the theoretical basis for studying plant nutrition has become the most important issue in crop physiology. In order to increase the harvest of cotton, it is necessary to use the correct plant root nutrition. In the cotton irrigation industry, quite a lot of work has already been done in this respect. However, the problems facing the researchers are still far from being solved. The system of nutrition can not be attributed to plants only during the growing season