摘要
简括综述了果树叶片是果树 N 素库之一、叶片 N 素回撒的时间和形态、叶片回撤 N 素的贮藏部位和形态、早春果树生长发育对叶片回撒 N 素的再利用及其生物学效应;讨论了增加叶片回撤 N 素的措施。在果树局部叶片施用(15)~N-尿素的示踪研究中,阐明了局部贮藏占优势及其次年再利用的特点;讨论了应用植物生长调节剂如 NAA 和乙烯利(CEPA)对促进叶内氮素回撤、节约氮素的实用意义。
The major part of this minireview is author' s research work in recent years,addition to some others'.It briefly reviewed some research acqui- sitions as follows:the role of storage nitrogen in fruit trees;the role of lea- ves as a nitrogen pool in fruit trees; the time and form of nitrogen transported out of leaves;the site and form of storage nitrogen come from leaves; in the spring the reutilization and biological effects of nitrogen come from leaves last year;and the way which cou|d promote nitrogen transportation out of leaves. The results which was gotten by'N-urea applied on fruit trees suggested the characteristics about the predominance of storage and reutilization of the nitro- gen come from leaves.The practical significance on the use of plant growth regulators,such as NAA or Ethrel,to promote nitrogen transportation out of leaves was discussed.
基金
国家自然科学基金会资助
关键词
果树
叶片
氮素
生长调节剂
fruit tree
nitrogen
leaves
plant growth regulators
