摘要
在江西省泰和县老虎山小流域选择了裸露地、水保林、水保林+竹节水平沟和水保林+竹节水平沟+枯落物覆盖4个坡面样地进行了全年取样试验,分析竹节水平沟对红壤坡面土壤水分的影响。结果表明:在土壤蓄水量上,竹节水平沟沟内的蓄水量相对更大,60 cm土层为138.1~237.3 mm,水保林下水土流失区域土壤蓄水量相对最小。从土壤含水量看,水保林土壤含水量较小,所有土层各月均在16%以下;水保林+竹节水平沟的土壤含水量基本在16%以上,说明在水保林中开挖竹节水平沟具有蓄积水分的作用;水保林+竹节水平沟+枯落物覆盖在月降雨量最小的9月,其土壤含水量仍然较高。对比各处理样地,土壤含水量最低的都是水保林,最高的是水保林+竹节水平沟+枯落物覆盖沟内样地或裸露地,水保林+竹节水平沟+枯落物覆盖样地沟内的土壤含水量比水保林样地高出79%~146%;同一处理样地的沟内土壤含水量基本大于沟外。竹节水平沟能起到蓄水保水的作用,对于防汛和抗旱都具有重要意义,是南方红壤侵蚀区调控水量的治本措施之一。
In order to study the effect of bamboo-type contour trench on soil moisture content in red soil slope,4 slope plots on bare land,soil and water conservation forest,soil and water conservation forest+bambootype contour trench and soil and water conservation forest+bamboo-type contour trench+litter-covered land were selected for a full year sampling test,in the Laohushan small watershed of Taihe County,Jiangxi Province.The results showed that the water storage capacity was relatively larger in bamboo-type contour trench,ranging from 138.1 mm to 237.3 mm in soil depth of 60 cm,while the soil water storage in the water and soil loss area under the conservation forest was relatively the smallest.The soil moisture content was relatively smaller in the land of soil and water conservation forest,which was below 16%in each soil layer in each month.Nevertheless,the soil moisture content was mainly above 16%in soil and water conservation forest+bamboo-type contour trench plot,which demonstrated that bamboo-type contour trench could serve to store soil moisture.The soil moisture content was relatively large in the soil and water conservation forest+bamboo-type contour trench+litter-covered plot even in September when the monthly rainfall is the least.Compared with other treatment plots,the lowest soil moisture contents were always in the plots under the soil and water conservation forest,while the highest was in the bare land or the soil and water conservation forest+bamboo-type contour trench+litter-covered land in the trench of which the soil moisture content was 79%−146%higher than that of soil and water conservation forest plot.Compared with the same treatment plots,the soil moisture content inside bamboo-type contour trench was much larger than outside.The bamboo-type contour trench can play a role in water storage and retention,and is of great importance for flood control and drought relief.It is one of the radical measures to regulate and control water volume in the eroded red soil region of south China.
作者
王嘉
莫明浩
宋月君
刘昭
聂小飞
Wang Jia;Mo Minghao;Song Yuejun;Liu Zhao;Nie Xiaofei(Jiangxi Institute of Soil and Water Conservation,Jiangxi Provincial Key Laboratory of Soil Erosion and Prevention,Nanchang Jiangxi 330029,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2020年第6期73-79,共7页
Journal of Southwest Forestry University：Natural Sciences
基金
江西水利科技项目(KT201718)资助
国家自然科学基金项目(41967011)资助
江西省重点研发计划项目(20192BBGL70043)资助
江西省青年科学基金项目(20171BAB213022)资助
江西水利科技项目(KT201521)资助。
关键词
竹节水平沟
土壤水分
土壤水库
坡面
红壤
bamboo-type contour trench
soil moisture content
soil reservoir
slope
red soil
