您好，欢迎访问北京市农林科学院 机构知识库！
北京市农林科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Uptake and Allocation of Newly Absorbed Nitrogen in Young Pear Trees Grafted onto Vigorous Rootstocks (Pyrus betulifolia)

文献类型： 外文期刊

作者： Wu, Yang 1 ; Sun, Mingde 1 ; Zhao, Zhi 2 ; Liang, Zhenxu 1 ; Liu, Jun 1 ; Liu, Songzhong 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Engn Res Ctr Deciduous Fruit Trees, Inst Forestry & Pomol, Minist Agr & Rural Affairs,Key Lab Biol & Genet I, Beijing 100093, Peoples R China

2.China Inst Water Resources & Hydropower Res, Dept Irrigat & Drainage, Beijing 100048, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Inst Forestry & Pomol, 12 Ruiwangfenjia, Beijing 100093, Peoples R China

关键词： fertilizer nitrogen; senescent leaves; new organs; woody structures; nitrogen use efficiency

期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）

ISSN：

年卷期： 2022 年 12 卷 10 期

页码：

收录情况： SCI

摘要： Nitrogen is one of the essential elements for fruit tree growth. Therefore, a N-15 tracing experiment was conducted to investigate the characteristics of nitrogen uptake and distribution in young pear trees. The experiment included: groups A and B, fertilized with 15 g unlabeled and 5 g labeled N per tree in the spring of 2017; and group C, fertilized with 20 g unlabeled N per tree in the spring of 2017 and 25 g unlabeled and 5 g labeled N per tree in the spring of 2018. Results indicated that new organs grew vigorously before June, and about 50% of the fertilizer nitrogen was concentrated in leaves. From June to November, the growth rate of storage organs was faster than that of new organs, and fertilizer nitrogen was mainly stored in the shoots, trunk, and roots. During the defoliation period, about 84% of the leaf fertilizer nitrogen was mobilized to the shoots, trunk, and roots. There was significant correlation between current fertilizer nitrogen and the dry mass weight of each organ after the completion of the nitrogen cycling of a whole year; the correlation coefficient was 0.98. Fertilizer nitrogen use efficiency increased with the ages of the pear trees. Therefore, nitrogen fertilizer rate should be formulated according to the tree growth characteristics and increased with the ages of the young pear trees; topdressing fertilizer should be applied in summer to ensure trunk and root development.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：北京市农林科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台