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应用生态学报 ›› 2018, Vol. 29 ›› Issue (5): 1443-1449.doi: 10.13287/j.1001-9332.201805.009

• 稳定同位素生态学专栏 • 上一篇    下一篇

库尔勒香梨春季施用15N-尿素的吸收、分配和利用特性

王前登1, 陈波浪1,2, 玉素甫江·玉素音1,2, 王成1, 柴仲平1,2*   

  1. 1新疆农业大学草业与环境科学学院, 乌鲁木齐 830052;
    2新疆土壤与植物生态过程实验室, 乌鲁木齐 830052
  • 收稿日期:2017-12-29 出版日期:2018-05-18 发布日期:2018-05-18
  • 通讯作者: *E-mail: chaizhongpingth@sina.com
  • 作者简介:王前登,男,1993年生,硕士研究生.主要从事果树营养与施肥研究. E-mail: 2314531200@qq.com
  • 基金资助:
    本文由新疆维吾尔自治区科技人才培养项目(QN2016YX0670)、国家自然科学基金项目(31460548)、新疆维吾尔自治区自然科学基金项目(2017D01A38)和新疆维吾尔自治区土壤学重点学科项目资助

Characteristics of absorption, utilization, and distribution of 15N-urea for Korla fragrant pear in spring.

WANG Qian-deng1, CHEN Bo-lang1,2, YUSUFUJIANG Yusuyin1,2, WANG Cheng1, CHAI Zhong-ping1,2*   

  1. 1College of Pratacultural and Environmental Science, Xinjiang Agricultural University, Urumqi 830052;
    2Xinjiang Key Laboratory of Soil and Plant Ecological Process, Urumqi 830052, China
  • Received:2017-12-29 Online:2018-05-18 Published:2018-05-18
  • Contact: *E-mail: chaizhongpingth@sina.com
  • Supported by:
    This work was supported by the Science and Technology Personnel Train Project of Xinjiang Uygur Autonomous Region in China (QN2016YX0670), the National Natural Science Foundation of China (31460548), the Natural Science Foundation of Xinjiang Uygur Autonomous Region in China(2017D01A38), and the Key Subject of Soil Science in Xinjiang Uygur Autonomous Region

摘要: 以6年生库尔勒香梨为试材,在春季香梨萌芽前施用15N尿素,研究香梨施用15N尿素的吸收、分配和利用特性.结果表明:不同生育期香梨吸收的15N在各器官的分配率存在显著差异,盛花期15N优先分配在根中,其Ndff(从肥料中吸收的15N量对该器官全氮量的贡献率)最高,新稍次之;新梢旺长期和果实膨大期根部吸收的15N优先向新生器官(叶和新稍)运转,根部15N的分配率不断下降;果实成熟期果实成为新的分配中心,其Ndff最高,果实累积的15N量占香梨树体总的15N吸收量的19.8%.香梨树体对土施15N-尿素肥料的当季利用率随生育期的推进而不断提高,到果实成熟期达到最大值(18.5%).

关键词: 同位素示踪, 库尔勒香梨, 吸收, 利用, 15N-尿素

Abstract: Six-year-old Korla fragrant pear trees were fertilized with 15N-labelled urea before early bud stage to examine the absorption, distribution, and utilization of urea. Results showed that there was a significant difference of 15N distribution rate in organs at different growth stages. 15N was pre-ferentially distributed in the roots , with Ndff (15N amount absorbed from the fertilizer contribution rate of the total nitrogen organ) being the highest in roots following by new shoots at full-bloom stage. During new shoot growing and fruit expanding stages, 15N absorbed in roots preferentially moved to new organs (leaves and new shoots), with 15N distribution rate to roots being continuously decreased. Fruits became the new distribution center with highest Ndff at harvest stage. The amounts of absorbed 15N in fruits accounted for 19.8% of total absorbed 15N in the tree. The utilization rate of 15N-labelled urea at current season increased gradually with the growth stages. The maximum value of utilization rate was 18.5%, which was observed at harvest stage.

Key words: 15N-urea, isotope tracer, absorption, Korla fragrant pear, utilization