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本文将国外有关柑桔类果树氮素营养的研究成果作综述介绍,并报导了近几十年来在这方面研究工作的进展概况。根据许多文献资料阐明了氮素营养在柑桔生长发育过程中的重大意义,及其某些生理效用;着重论述柑桔对氮素吸收的性状,所要求条件与氮素在柑桔树体内的分布运转等。文末介绍了一些施用氮肥的改进技术;并举述了许多在柑桔氮素营养中的重要结论和存在问题,我国在开展这方面科学研究中可资参考。
This paper summarizes the research results of citrus fruit nitrogen nutrition in foreign countries and reports the progress of the research in this field in recent decades. According to many literatures, the significance of nitrogen nutrition in the process of citrus growth and development and some physiological effects are clarified. The characteristics of nitrogen absorption of citrus are emphatically discussed. The requirements are in line with those of nitrogen in citrus trees Distribution and other operations. At the end of the article, some improved techniques for applying nitrogen fertilizer are introduced. Many important conclusions and existing problems in nitrogen nutrition of citrus are also described. China can make reference in carrying out scientific research in this aspect.