生物资源

放牧对矮锦鸡儿种子生产的影响

  • 王悦 ,
  • 王立红 ,
  • 王德凯 ,
  • 解李娜 ,
  • 李清芳 ,
  • 马成仓
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  • 天津师范大学生命科学学院,天津市动植物抗性重点实验室,天津 300387
王悦(1992-),女,硕士研究生,研究方向为植物生态.E-mail:1245181200@qq.com
李清芳. E-mail: machengcang@163. com

收稿日期: 2017-07-21

  修回日期: 2017-08-30

  网络出版日期: 2025-11-17

基金资助

国家自然科学基金项目(31570453,31170381)资助

Effects of Grazing on the Seed Production of Caragana pygmaea

  • WANG Yue ,
  • WANG Li-hong ,
  • WANG De-kai ,
  • XIE Li-na ,
  • LI Qing-fang ,
  • MA Cheng-cang
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  • Tianjin Key Laboratory of Animal and Plant Resistance,College of Life Sciences,Tianjin Normal University,Tianjin 300387,China

Received date: 2017-07-21

  Revised date: 2017-08-30

  Online published: 2025-11-17

摘要

通过调查内蒙古地区不同放牧强度样地中矮锦鸡儿(Caragana pygmaea)的花朵特性和果实特性,包括物候期、花朵数量、花生物量、花变异系数、花有性繁殖投入量、荚果数、单荚果种子数和总种子数等指标,旨在弄清放牧对矮锦鸡儿种子生产的影响。结果表明:放牧对矮锦鸡儿有性繁殖物候期无显著影响;放牧导致矮锦鸡儿花朵数、花生物量、花有性繁殖投入量显著下降;放牧对矮锦鸡儿花变异系数影响不大;放牧降低了矮锦鸡儿的幼荚果数、成熟荚果数和荚果内种子数,从而使总种子数显著下降。这说明放牧显著抑制矮锦鸡儿的种子生产。重度放牧下,矮锦鸡儿花期败育率最高,这说明重度放牧时限制矮锦鸡儿种子生产的主要阶段是花到幼荚果阶段,在矮锦鸡儿花期应适当减少放牧。

本文引用格式

王悦 , 王立红 , 王德凯 , 解李娜 , 李清芳 , 马成仓 . 放牧对矮锦鸡儿种子生产的影响[J]. 干旱区研究, 2018 , 35(3) : 648 -652 . DOI: 10.13866/j.azr.2018.03.18

Abstract

In order to understand the effect of grazing intensity on the seed production of Caragana pygmaea,the flower and fruit characteristics of C.pygmaea under different grazing intensities in Inner Mongolia,China were measured,which included the phonological period of sexual reproduction of C.pygmaea,flower number,flower biomass,coefficient of flower variation,sexual reproduction input of flower,pod number,total seed number,etc.Results showed that grazing treatments did not affect significantly the phonological period of sexual reproduction of C.pygmaea; grazing reduced significantly the flower number,flower weight and sexual reproduction input of flower,but it did not influence the coefficient of flower variation significantly.Besides,grazing reduced significantly the number of young pods and the seed number in pods,thus the total seed number of C.pygmaea was decreased.These results indicated that grazing could significantly reduce the seed production of C.pygmaea.In addition,the abortive rate of florescence was the highest under heavy grazing,which indicated that the life stage from florescence to young pods was a bottleneck for seed production of C.pygmaea.Therefore,the grazing intensity during florescence of C.pygmaea should be appropriately decrease.

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