Impacts of Runoff on Land Productivity of Sloping Field in Semi-arid Hilly and Gully Region of Loess Plateau

CHEN Qibo; QI Shi; SUN Lida; WU Xiaowei

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Impacts of Runoff on Land Productivity of Sloping Field in Semi-arid Hilly and Gully Region of Loess Plateau

- Impacts of Runoff on Land Productivity of Sloping Field in Semi-arid Hilly and Gully Region of Loess Plateau
- Bulletin of Soiland Water Conservation Vol. 20, Issue 5, Pages: 6-9(2001)
- 作者机构：
  
  1. 西南林学院环境科学系
  2. 北京林业大学
  3. 宁夏回族自治区西吉县农田基本建设办公室,云南,昆明,650224
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2001
- 稿件说明：
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CHEN Qibo, QI Shi, SUN Lida, et al. Impacts of Runoff on Land Productivity of Sloping Field in Semi-arid Hilly and Gully Region of Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2001, 20(5): 6-9.
DOI：

CHEN Qibo, QI Shi, SUN Lida, et al. Impacts of Runoff on Land Productivity of Sloping Field in Semi-arid Hilly and Gully Region of Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2001, 20(5): 6-9. DOI：

摘要

采用表土人工堆积小区试验方法

研究了半干旱黄土丘陵区西吉县的坡耕地径流损失对土地生产力的影响。结果表明

干旱、半干旱黄土丘陵区由径流损失造成的坡耕地土地生产力下降不可忽视

坡耕地平均每年每损失1mm径流会导致供试作物春小麦减产9.7%

马铃薯减产5.0 %

春小麦产量受径流损失的影响是马铃薯的2倍;不同坡度坡耕地春小麦每年因径流损失减产41.7%～ 64.0 %

马铃薯减产21.5%～ 33.0%

每年由此所造成的粮食减产分别是坡耕地和农业用地粮食总产量的 73.3%和 16.3%。

Abstract

Based on plot test of piling up top soil

the impacts of runoff on land productivity of sloping field is researched in Xiji county

semi arid hilly and gully region of the loess plateau. The results show that the lost runoff plays an important rule in the impacts of soil and water loss on land productivity of sloping field. Each 1 mm of lost runoff costs 9.7% of spring wheat output and 5.0% of potato

namely the impacts of lost runoff on spring wheat output of sloping field is half of that on potato. The impacts of lost runoff on spring wheat decreased by 41.7%～64.0% of its output in sloping field of different slope degrees and on potato decreases by 21.5%～33.0%. Impact of runoff on crops is 73.3% of the sloping field outputs every year and 16.3% of the total cultivated field.

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