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Position: Home > Articles > Dynamics of Organic Carbon Storagein Stipa breviflora Desert Steppe Ecosystem under Different Grazing Systems Chinese Journal of Grassland 2014,36 (5) 6-11

不同放牧制度下短花针茅荒漠草原生态系统碳储量动态

作者：

胡向敏;侯向阳;丁勇;陈海军;运向军;武自念

单位：

中国农业科学院草原研究所

关键词：

放牧制度;荒漠草原;生态系统;碳储量

摘要：

以内蒙古短花针茅荒漠草原自由放牧样地、划区轮牧样地和围栏禁牧样地为对象,通过分析整个生长季5~10月地上植物、枯落物、根系和土壤有机碳储量,研究草原生态系统碳储量变化规律,从碳储量角度为草原合理利用提供指导。研究结果表明:(1)自由放牧样地生态系统有机碳储量显著低于围栏禁牧和划区轮牧样地(P<0.05);(2)生长季内自由放牧样地生态系统有机碳储量变化表现为降-升-降趋势,划区轮牧和围栏禁牧样地表现为升-降趋势;(3)生长季内生态系统有机碳储量总净增量呈负增长趋势,表现为自由放牧>划区轮牧>围栏禁牧,分别为-636.35g/m2、-265.06g/m2和-46.74g/m2;(4)各部分所占生态系统有机碳储量比例表现为土壤>根系>地上植物>枯落物,地下部分碳储量为草原碳储量主体。综合分析表明,放牧制度明显改变了短花针茅荒漠草原生态系统有机碳储量的积累过程,有利于有机碳储量积累的放牧制度排序为围栏禁牧>划区轮牧>自由放牧。

译名：

Dynamics of Organic Carbon Storagein Stipa breviflora Desert Steppe Ecosystem under Different Grazing Systems

作者：

HU Xiang-min;HOU Xiang-yang;DING Yong;CHEN Hai-jun;YUN Xiang-jun;WU Zi-nian;Grassland Research Institute,Chinese Academy of Agriculture Science;School of Postgraduate,Chinese Academy of Agriculture Science;

关键词：

Grazing systems;;Desert steppe;;Ecosystem;;Carbon storage

摘要：

The change of organic carbon storage of aboveground plant,litter,root and soil within 0to30 cm soil layers were studied from May to October,based on three different grazing systems,which were continuous grazing(CG),rotational grazing(RG)and non-grazing(NG)in Stipa breviflora desert steppe in Inner Mongolia.The result showed that:(1)The ecosystem organic carbon storage of CG was significantly lower than that of RG and NG(P<0.05).(2)The change of ecosystem organic carbon storage in growing season were that CG was a down-up-down curve,RG and NG were a up-down curve.(3)Three sampling sites were characterized by the negative growth tendency of total net increase carbon storage,the order of that was CG> RG> NG,was-636.35g/m2,-265.06g/m2 and-46.74g/m2 respectively.(4)The proportion of each part to ecosystem organic carbon storage was soil>root>aboveground plant>litter,the organic carbon storage of underground part was the main body in the grassland organic carbon storage.The comprehensive analysis suggested that grazing systems could change the accumulation course of ecosystem organic carbon storage,and the order of reasonable grazing system contributed to carbon accumulation was NG> RG> CG.

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不同放牧制度下短花针茅荒漠草原生态系统碳储量动态

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