摘要
为了揭示榜沙河流域不同土壤的侵蚀特性,取样检测土壤机械组成、有机质含量,并采用实地放水冲刷法检测土壤抗冲性、采用浸水法检测土壤团聚体的水稳性指数(K)。结果表明:榜沙河流域抗冲性褐土最强,黑垆土次之,黄绵土最弱;抗蚀性黑垆土最强,褐土次之,黄绵土最弱;粒径为0.002~0.020 mm的土壤抗冲性最强,粒径为0.020~0.200 mm的土壤抗蚀性最强;土壤有机质含量与土壤抗冲性、抗蚀性成正相关关系,土壤抗冲性与土壤抗蚀性成正相关关系;土壤稳定性与土壤结构、有机质含量紧密相关,有机质含量越高,土壤结构越稳定、越不容易发生侵蚀。
In order to reveal the erosion characteristics of different soils in Bangsha River basin,this study tested the soil mechanical composition and organic matter content and determined the soil anti-scourability by field water scouring method and water stability index of soil aggregates（ K） by immersion method. The results show that the soil anti-scourability from strong to weak is brown soil,black soil and yellow soil,and the soil anti-erosion from strong to weak is black soil,brown soil and yellow soil. When soil mechanical composition is mainly medium grade（ 0. 002-0. 020 mm）,soil anti-scourability is the strongest. When soil mechanical composition is mainly granules（ 0. 02-0. 20 mm）,soil anti-erosion is the strongest. Soil organic matter content is positively correlate with soil anti-scourability and soil anti-erosion. The soil anti-scourability and soil anti-erosion are also in positive correlation. Soil stability is closely related to the soil structure and organic matter content,the higher content of organic matter,the more stable of soil structure and the less likely happening soil erosion.
作者
杨靖文
李欣娟
李晶
YANG Jingwen;LI Xinjuan;LI Jing(Gansu Institute of Soil and Water Conservation Sciences,Lanzhou 730020,China)
出处
《人民黄河》
CAS
北大核心
2018年第10期72-76,共5页
Yellow River
基金
甘肃省水利科研课题(甘水科外发【2016】76号-8)
关键词
土壤抗冲性
抗蚀性
水稳性指数
榜沙河流域
soil anti-scourability
soil antierosion
water stability index
Bangsha River basin
