干旱地区农业研究2016，Vol.34Issue(4)：12-17,6.DOI:10.7606/j.issn.1000-7601.2016.04.03
黄土塬区土地利用变化对深剖面土壤水分的影响
The effects of land-use change on soil moisture in deep soil profile at Changwu loess tableland
摘要
Abstract
10 m soil profiles were sampled fromthree representative land-use types (farmland ,apple orchard about 10 years old and 20 years old ) at six sites on the Changwu loess tableland .In this study ,soil water content wasmeasured and a quantified analysiswas conducted to evaluate the effect of farmland that had been converted to apple orchard for 10 years and for 20 years .Results showed that there was an increasing trend in soil water contentwith the increase ofdepth in farmlands and apple orchards about 10 years old ,but the trend was remarkably different inapple orchard about 20 years old .In 6~10 m layer ,soil water contents in three land-use types weresimilarlystable withdepthincrease .The average soil water content in 0~6 m ,6~10 m and 0~10 m layers in three land-use types were 17 .8% ,17 .5% and 15 .8%(farmland ) ,20 .4% ,20 .6% and 14 .8% (10 years old orchard ) ,and 18 .8% ,18 .7% and 15 .4% (20 years old or-chard ) ,respectively .Compared with farmlands ,the average soil water contents at 0~6 m ,6~10 m and 0~0 m layers in apple orchard about 20 years oldwere decreased by 11% ,27% and 18% ,respectively .The average soil water storage at 6~10 m layerin farmlands was 1 063 mm ,but the conversion to apple orchardsfor 20 years reduced soil water storage by 291 mm .Land-use change had a significant impact on deep soil water ,which probably reducedthe deep percola-tionofwater and further affected groundwater recharge .Conversion of farmland to grasslands and forests is one of the main types of land-use changes on the Loess Plateau ,which may further alter regional hydrologic cycle .关键词
土壤水分/土地利用变化/苹果园/深剖面/黄土高原Key words
soil moisture/land-use change/apple orchard/deep profile/the Loess plateau分类
农业科技引用本文复制引用
向伟,林雪青,张志强,李志..黄土塬区土地利用变化对深剖面土壤水分的影响[J].干旱地区农业研究,2016,34(4):12-17,6.基金项目
国家自然科学基金（51179161）；陕西省科学技术研究发展计划（2013KJXX－18）；中央高校基本科研业务费 （）
