Acta Agrestia Sinica ›› 2017, Vol. 25 ›› Issue (6): 1206-1211.DOI: 10.11733/j.issn.1007-0435.2017.06.007

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The Effect of Mowing and Nutrient Adding Back on the Biomass and Compositions of Leymus Chinensis Grassland Plant Community

BAI Tian-xiao, BAI Yang, LIU An-na, MINGGAGUD Hugjilt, BAOYIN Tao-ge-tao   

  1. College of Ecology and Environmental Sciences, Inner Mongolia University, Hohhot, Inner Mongolia 010021, China
  • Received:2017-03-01 Revised:2017-09-12 Online:2017-12-15 Published:2018-03-30

刈割和养分回添对羊草草原植物群落生物量及其构成的影响

白天晓, 白杨, 刘安娜, 呼格吉勒图, 宝音陶格涛   

  1. 内蒙古大学生态与环境学院, 内蒙古 呼和浩特 010021
  • 通讯作者: 宝音陶格涛,E-mail:bytgtnm@126.com
  • 作者简介:白天晓(1993-),女,内蒙古通辽人,硕士研究生,研究方向为草地生态,E-mail:981455889@qq.com
  • 基金资助:

    公益性行业(农业)科研专项(201303060);内蒙古自然科学基金重大项目(2015ZD05);内蒙古科技计划项目资助

Abstract:

Based on the control test of nutrient adding back starting in 2011, the effect of different fertilizers (nitrogen, mowing parts of plants and organic matters) on the above-ground biomass of Leymus chinensis plus Stipa krylovii plus Cleistogenes squarrosa communities of XilinGol League mowing grassland was studied. The result showed:compared with the no-mowing, the mowing plus organic matter adding back, mowing plus plant adding back and mowing treatment significantly reduced the above-ground biomass of plant community, but mowing plus N element adding back showed no obvious reduction in biomass. The above-ground biomass of broad-leaved herbs and annuals and biennials all increased in four treatments. Compared with mowing only, mowing plus plant adding back increased the biomass of rhizomatous grasses and the above-ground biomass of Leymus chinensis community, and mowing plus N element adding back showed an obvious increase in the above-ground biomass of bunch-type grasses and Stipa krylovii and the biomass of Cleistogenes squarrosa, which indicated the effect of nutrient adding back on the above-ground biomass of plant community was not only associated with types and amount of fertilizers, but also related to the species composition of the grassland plant community.

Key words: Mowing, Nutrient adding back, Above-ground biomass, Leymus chinensis steppe

摘要:

基于2011年开始的养分回添控制试验,研究锡林郭勒盟草原羊草+克氏针茅+糙隐子草群落在不同肥料(氮、植物割取部分和有机质)对羊草割草场植物群落地上生物量的影响。结果表明:与不刈割相比,刈割+有机质回添、刈割+植物回添和刈割处理显著降低了植物群落地上生物量,但刈割+N素回添处理生物量并没有显著降低。4种处理均增加杂类草和一、二年生植物的地上生物量。与单纯刈割相比,刈割+植物回添处理可增加根茎禾草生物量;刈割+N素回添处理显著增加丛生型禾草地上生物量。与单纯刈割相比,刈割+植物回添处理增加了羊草(Leymus chinensis)种群地上生物量,刈割+N素回添处理增加克氏针茅(Stipa krylovii)种群地上生物量并显著增加糙隐子草(Cleistogenes squarrosa)生物量。这说明养分回添对植物群落地上生物量的影响,不仅与所施肥料种类和施肥量有关,还与该草原植物群落物种组成有关。

关键词: 刈割, 养分回添, 地上生物量, 羊草草原

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