草业学报2016，Vol.25Issue(6)：26-33,8.DOI:10.11686/cyxb2015486
划破草皮对不同地形高寒草甸草原土壤特征及地下生物量的影响
Effects of sward cleavage on soil characteristics and underground biomass in different terrains of alpine meadows-steppe
摘要
Abstract
The effects of sward cleavage on soil characteristics and underground biomass were investigated in ar-eas of flat terrain and gentle slope terrain located in the eastern alpine meadow-steppe of the Qinghai-Tibetan Plateau.The results showed that the effects of sward cleavage on soil water contents and soil compaction were most significant in July and August,with the treatment’s improving effects during that period being signifi-cantly better for flat terrain than gentle slope terrain.The underground biomass of cut grooved surfaces de-creased in both flat terrain and gentle slope terrains at the beginning of treatment.However,the underground soil biomass in flat terrain soil layers had significantly increased after growing for four months while it had de-creased in gentle slope terrain compared with the control.In addition,soil organic carbon contents in flat ter-rain increased after treatment but decreased on gentle slopes.Our research shows that sward cleavage in flat terrain significantly improves the low productivity of alpine meadow-steppe grasses,but that caution is advised when using this technique on gentle slope terrain.关键词
高寒草甸草原/划破草皮/不同地形/土壤特征/地下生物量Key words
alpine meadow-steppe/cleavage treatment/different terrain/soil characteristics/belowground bio-mass引用本文复制引用
李小龙,曹文侠,李文,张晓燕,徐长林,韦应莉,师尚礼..划破草皮对不同地形高寒草甸草原土壤特征及地下生物量的影响[J].草业学报,2016,25(6):26-33,8.基金项目
国家自然科学基金（31360569），现代农业产业技术体系（CARS-35），甘肃省农牧厅“退牧还草科技支撑项目”和“青藏高原打草场建设项目”资助。 （）
