摘要
本文综述了甜橙氮素营养与施肥的主要研究结果。其内容分别概述了氮在树体内的分布与缺乏症状,氮的季节性吸收与叶片氮含量的年周期变化;分析比较了国内外在施氮与叶片氮含量和产量的相关性等方面所得出的结果。结合四川甜橙的栽培实践和作者的研究,重点评述了氮肥施用量对产量、果实品质的影响及氮肥均施用时期、次数。认为,甜橙氮素虽为研究最多的一种元素,但对确定甜橙氮肥施用的最适参数尚需科学农据,仍处在不断的研究改进中。
A review is made on the major results from the studies on N nutritionand fertilization for orange plants,including N distribution in orangeplants,N deficiency symptoms,the seasonal patterns of N uptake and leaf Ncontent,and the correlation among N application rates,leaf N concentrat-ions and fruit yield.According to the specific situations in Sichuan orangegrowing and the results of the author's work,emphasis is placed on thediscussion of the effects of N rates on fruit yield and quality and thetiming of N application.It is argued that although N in citrus nutrition iswell documented,accurate data remain insufficient for the determining theoptimum parameters of N fertilization in orange orchards and furtherstudy and improvement are needed.
出处
《西南农业大学学报（自然科学版）》
CSCD
1991年第1期21-26,共6页
Journal of Southwest Agricultural University
关键词
甜橙
氮素
营养
施肥
citrus
nitrogen nutrition
fertilizing
