干旱区生态环境知识资源中心(Arid): 不同补播模式对荒漠草原土壤团聚体稳定性的影响

Arid

	不同补播模式对荒漠草原土壤团聚体稳定性的影响
其他题名	Effects of Different Reseeding Pattern on Soil Aggregate Stability in Desert Steppe
	时龙 1; 郭艳菊 1; 于双 2; 陶利波 2; 许冬梅 2
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2019
卷号	41 期号:3 页码:83-89
中文摘要	针对宁夏荒漠草原退化生态系统,采用地表深翻处理后补播蒙古冰草+沙生冰草+牛枝子、沙生冰草+牛枝子、蒙古冰草+牛枝子3种模式进行改良,以未补播草地为对照,通过团聚体粒径组成、平均重量直径、几何平均直径、破坏率等指标,研究不同补播模式对宁夏荒漠草原土壤团聚体稳定性的影响。结果表明,0~40cm土层,各补播草地机械稳定性及水稳性团聚体均以<0.25mm微团聚体为主,且随土层加深<0.25mm微团聚体含量逐渐减少,土壤结构趋于稳定;0~20cm浅层土壤,蒙古冰草+沙生冰草+牛枝子补播草地的>0.25mm机械稳定性团聚体含量显著高于未补播草地(P<0.05),不同处理草地之间>0.25mm水稳性团聚体含量、平均重量直径、几何平均直径及破坏率差异不显著。综上,深翻后补播蒙古冰草+沙生冰草+牛枝子可改善荒漠草原0~20cm浅层土壤机械团聚体稳定性。
英文摘要	To restore the degraded ecosystems of desert steppes in Ningxia,the experimental plots were reseeded by using different herbs collocation after deep plowing.The herbs collocation included Agropyron mongolicum + A.desertorum+ Lespedeza potaninii (MSN),A.desertorum + L.potaninii (SN) and A.mongolicum + L.potaninii (MN),with the non-reseeded grassland as the control plots (CK).The size distribution,mean weight diameter (MWD),geometric mean diameter (GWD) and destruction rate (PAD) of soil aggregates in different depths were measured and compared to explore the effects of different reseeding patterns on soil aggregate stability.The results showed that the mechanical-stable and water-stable aggregates of each treatment in the 0~40cm soil layer were dominated by <0.25mm micro-aggregates and which gradually decreased with the increase of soil depth.The content of >0.25mm mechanical-stable aggregates (DR_(0.25)) in topsoil (0~20cm) under MSN treatment was significantly higher than that of CK (P<0.05),however,no significant difference was found among the content of >0.25mm water-stable aggregates (WR_(0.25)),MWD,GMD and PAD under different treatments (P<0.05).In summary,mixed reseeding A.mongolicum,A.desertorum and L.potaninii after deep ploughing can improve the mechanical aggregate stability of topsoil in desert steppe.
中文关键词	补播 ; 荒漠草原 ; 土壤团聚体 ; 植被恢复
英文关键词	Reseeding Desert steppe Soil aggregates Stability
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6511156
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239726
作者单位	1.宁夏大学农学院, 银川, 宁夏 700521, 中国; 2.宁夏大学农学院;;西北土地退化与生态恢复国家重点实验室培育基地, ;;西北土地退化与生态恢复国家重点实验室培育基地, 银川;;银川, 宁夏;;宁夏 700521;;750021, 中国
推荐引用方式 GB/T 7714	时龙,郭艳菊,于双,等. 不同补播模式对荒漠草原土壤团聚体稳定性的影响[J]. 宁夏大学,2019,41(3):83-89.
APA	时龙,郭艳菊,于双,陶利波,&许冬梅.(2019).不同补播模式对荒漠草原土壤团聚体稳定性的影响.中国草地学报,41(3),83-89.
MLA	时龙,et al."不同补播模式对荒漠草原土壤团聚体稳定性的影响".中国草地学报 41.3(2019):83-89.