ISWC OpenIR  > 水保所知识产出(1956---)
放牧对草地群落与土壤特征的影响
刘玉1; 常小峰1; 田福平2; 刘振恒3; 党志强1
2016
Source Publication西北植物学报
Volume36Issue:12Pages:2524-2532
Abstract

针对放牧干扰对草地生态系统的影响,采用回归分析和典型对应分析(CCA)方法,研究放牧对草地植物群
落物种多样性与生产力、土壤碳氮含量与生物量关系的影响。结果表明:(1)与休牧草地相比,放牧草地的地上生
物量降低31.63%,凋落物生物量降低134.29%;放牧草地的禾草类生物量提高19.77%,而杂草类生物量和豆科
类生物量分别降低31.09%和23.42%。(2)当物种多样性指数小于1.3时,休牧草地的生产力明显高于放牧草地;
当物种多样性指数大于1.3时,放牧草地的生产力高于休牧草地。(3)CCA分析显示,家畜主要通过影响群落地上
生物量、凋落物质量和土壤容重进而影响土壤的碳氮含量。(4)当群落地上生物量小于100g·m-2时,休牧草地的
土壤有机碳和全氮含量高于放牧草地,当群落地上生物量大于100g·m-2时,放牧草地则略高于休牧草地。(5)当
群落地下生物量小于1 200g·m-2时,放牧草地土壤有机碳、全氮含量高于休牧草地;当地下生物量大于1 200g·
m-2时,放牧草地则略低于休牧草地。

Other Abstract

To explore how grazing affects grassland ecosystem,we studied the relationship of grassland community
and soil characteristics in both grazing and rest-grazing grasslands.The object of this study was to
determine the changes of the relationships between species diversity and productivity,soil characteristics
(soil organic carbon,nitrogen contents)and biomass in the grazing grassland.The results showed that:
(1)the above biomass and litter biomass were decreased significantly by livestock ingestion.From the perspective
of functional groups,the biomass of grasses in grazing grassland was 19.77% more than in restgrazing grassland.However,the biomass of forbs and legumes in grazing grassland were 31.09%and 23.
42%less than in rest-grazing grassland.The ingested strategies of livestock were changed in the communities
with different species diversity.Community productivity was decreased significantly by ingesting enormous
grasses,which is the dominant species in community,in the communities with lower species diversity.(
2)When diversity was less than 1.3,the productivity of rest-grazing grassland is higher than that of
grazing grassland,but when diversity was more than 1.3,community productivity showed a contrary
trend.(3)Results from Canonical Correlation Analysis(CCA)showed that livestock influenced soil carbon
and nitrogen contents through changing above-ground biomass,litter biomass and soil bulk density.
(4)Above-biomass was significantly influenced by livestock in the lower above-ground biomass community
(<100g·m-2),so the soil organic carbon and total nitrogen contents responding to the same aboveground
biomass were higher in rest-grazing grassland than that in grazing grassland.However,there was a
contrary trend in the high above-biomass grassland(>100g·m-2).(5)When below-ground biomass was
less than 1 200g·m-2,soil organic carbon and total nitrogen contents were higher in grazing grassland
than that in rest-grazing grassland,but when below-ground biomass was more than 1 200g·m-2,soil organic
carbon and total nitrogen contents showed a contrary trend.We suggested that the scientific and reasonable
grazing and management strategies should be conducted to coordinate livestock and plant community.
Both economic benefits and ecological benefits should be considered,when achieving sustainable development
in grassland grazing ecosystem.

Keyword物种多样性 土壤特征 放牧生态系统 草地生产力 多样性与生产力
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8730
Collection水保所知识产出(1956---)
Affiliation1.中国科学院水利部水土保持研究所,西北农林科技大学,黄土高原土壤侵蚀与旱地农业国家重点实验室
2.中国农业科学院兰州畜牧与兽药研究所,农业部兰州黄土高原生态环境重点野外科学观测试验站
3.甘肃省玛曲 县草原工作站
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
刘玉,常小峰,田福平,等. 放牧对草地群落与土壤特征的影响[J]. 西北植物学报,2016,36(12):2524-2532.
APA 刘玉,常小峰,田福平,刘振恒,&党志强.(2016).放牧对草地群落与土壤特征的影响.西北植物学报,36(12),2524-2532.
MLA 刘玉,et al."放牧对草地群落与土壤特征的影响".西北植物学报 36.12(2016):2524-2532.
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