Reducing the Grourd Evaporation and Using the Precipitation Resource Fully— A Reflection on Eco-ag riculture of Dry Slopeland in Loess Plateau Region

Zhang Xinbao; An Zhisheng

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Reducing the Grourd Evaporation and Using the Precipitation Resource Fully— A Reflection on Eco-ag riculture of Dry Slopeland in Loess Plateau Region

- Reducing the Grourd Evaporation and Using the Precipitation Resource Fully— A Reflection on Eco-ag riculture of Dry Slopeland in Loess Plateau Region
- Bulletin of Soiland Water Conservation Vol. 16, Issue 1, Pages: 55-62(1997)
- 作者机构：
  
  中国科学院西安黄土与第四纪国家重点实验室,西安市,710061
- 作者简介：
- 基金信息：
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- Published：1997
- 稿件说明：
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Zhang Xinbao, An Zhisheng. Reducing the Grourd Evaporation and Using the Precipitation Resource Fully— A Reflection on Eco-ag riculture of Dry Slopeland in Loess Plateau Region[J]. Bulletin of Soiland Water Conservation, 1997, 16(1): 55-62.
DOI：

Zhang Xinbao, An Zhisheng. Reducing the Grourd Evaporation and Using the Precipitation Resource Fully— A Reflection on Eco-ag riculture of Dry Slopeland in Loess Plateau Region[J]. Bulletin of Soiland Water Conservation, 1997, 16(1): 55-62. DOI：

摘要

黄土高原旱坡地的降水分配大致如下：地表流量<5%～10%;地面蒸发量45%～50%左右；植物蒸腾量，45%～50%.旱坡地的水土保持不应仅考虑地表径流的入渗拦蓄，更应重视减少地面蒸发。“地面覆盖十生物蓠”旱坡地生态农业系统可以有效减少地面蒸发，控制水土流失，大幅度提高作物产量，投入少、见效快、适宜大面积推广。

Abstract

The precipitation on dry slopeland of loess plateau region is approximately distributed as follows: the ground runoff makes up less than 5%～10%

the ground evaporation accounts for about 45%～ 50%；and the plant transpiration amounts to 45%～50%.So the work of soil and water conserv ation on dry slopeland should not only consider the infil tration and retaining of ground runoff

the reducing of evaporation from the earth 's surface should be more valued.The eco-ag riculture system on dry slopel and of“ ground covering+ bio bar rier”could reduce the ground evaporation effectively

and control soil erosion and raise the crop yield by a big margin. It calls for small investments and yield quick returns

and it is sui table for larg-scale spreading.

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