Please wait a minute...
浙江大学学报（农业与生命科学版）
浙江大学学报(农业与生命科学版)  2015, Vol. 41 Issue (1): 101-110    DOI: 10.3785/j.issn.1008-9209.2014.03.121
资源与环境科学     
围封条件下荒漠草原4种典型植物群落枯落物输入对土壤理化性质的影响
李学斌1,陈林1,樊瑞霞1,吴秀玲,谢应忠1
1．宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,银川750021;2．宁夏农业勘查设计院,银川750001
Effects of four typical plant community litter input on soil physical and chemical properties under the fenced condition in desert steppe
Li Xuebin1*, Chen Lin1, Fan Ruixia1, Wu Xiuling2, Xie Yingzhong1
(1. Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of Education, Ningxia University, Yinchuan 750021, China; 2. Ningxia Agricultural Prospecting and Design Institute, Yinchuan  750001, China)
 全文: PDF(3111 KB)   HTML ( ) 
摘要： 采用野外原位实验和室内控制实验相结合的方法研究了围封条件下荒漠草原4种典型植物群落(沙芦草群落、甘草群落、赖草群落和沙蒿群落)枯落物分解对土壤理化性质的影响。结果表明：荒漠草原4种典型植被群落围封内枯落物蓄积量显著高于围封外,枯落物的蓄积增加了土壤的持水量,但枯落物的分解短期内对土壤体积质量、孔隙度及持水性能影响较小;枯落物在分解过程中,由于积累了大量腐殖酸导致了pH值降低,且土壤的pH值也呈降低趋势,但变化幅度不大,与枯落物pH值呈现一定的拟合效果;枯落物输入短期内对土壤全氮和有机碳有正效应。荒漠草原枯落物蓄积与分解能有效改善土壤中的水分运移与空间分布,并为土壤注入更多的有机质和养分元素,从而改变土壤理化性质。“退耕还草”“封栏封育”等国家重大生态工程地实施对荒漠草原植被与土壤的恢复产生了积极的影响。
Abstract: Litter not only can avoid plants being suffered from splash erosion, wind erosion and other physical protection of rain, but also can accelerate the accumulation of soil moisture, nutrients, and improve soil fertility. In the last decade, The National Projects of Ecological Engineering such as Returning Cropland to Grass and Enclosure Steppe, have been performed, but effects of litter input on soil physical and chemical properties under the fenced condition in desert steppe remain poorly understood. We created field decomposition experiment and laboratory experiment based on four typical plant communities under a fenced condition, which were Agropyron crisatum community, Glycyrrhiza uralensis community, Leymus secalinus community and Artemisia desertorum community, and analyzed the basic characteristics of four typical plant communities, litter accumulation and decomposition, and soil moisture and nutrients, respectively. The results showed that the litter accumulation under the fenced condition was significantly higher than that of the no fenced condition, and the litter accumulation increased soil water holding capacity, while the litter decomposition had weak effect on soil bulk density, total porosity and water holding capacity in the short term. Although soil pH value decreased with the litter accumulation, but the variation was small. Litter input had positive effect on the soil total nitrogen in the short-term, but the effect was weak, and the soil total nitrogen and organic carbon increased with increasing litter accumulation. These results supported that the litter accumulation and decomposition in the desert steppe could effectively improve the soil water movement and spatial distribution, and transport more organic and nutrient elements into the soil, thus change the physical and chemical properties of soil. The finding suggests that litter has positive effect on vegetation and soil restoration of the desert steppe, which plays more important role in maintaining ecosystem stability in the arid sand areas.
出版日期: 2015-01-20
CLC:  S 812.8  
服务　　
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章　　
李学斌
陈林
樊瑞霞
吴秀玲
谢应忠

引用本文:

李学斌,陈林,樊瑞霞,吴秀玲,谢应忠. 围封条件下荒漠草原4种典型植物群落枯落物输入对土壤理化性质的影响[J]. 浙江大学学报(农业与生命科学版), 2015, 41(1): 101-110.

Li Xuebin, Chen Lin, Fan Ruixia, Wu Xiuling, Xie Yingzhong . Effects of four typical plant community litter input on soil physical and chemical properties under the fenced condition in desert steppe. Journal of Zhejiang University (Agriculture and Life Sciences), 2015, 41(1): 101-110.

链接本文:

http://www.zjujournals.com/agr/CN/10.3785/j.issn.1008-9209.2014.03.121    或    http://www.zjujournals.com/agr/CN/Y2015/V41/I1/101

No related articles found!