| 黄土高原旱区降水资源化制约因素分析 |
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| 引用本文： | 胡兵辉,廖允成,贺金红,程天矫,于稀水.黄土高原旱区降水资源化制约因素分析[J].农业现代化研究,2006,27(2):157-160. |
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| 作者姓名： | 胡兵辉 廖允成 贺金红 程天矫 于稀水 |
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| 作者单位： | 西北农林科技大学农学院,陕西,杨陵,712100 |
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| 基金项目： | 中国科学院资助项目;西北农林科技大学校科研和教改项目 |
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| 摘 要： | 黄土高原是中国旱地农业的重要实施区域，降水是其农业生产的主要水分来源。然而该区不仅年降水量有限，而且分布不均，夏季多大雨、暴雨，加之地形起伏不平，致使有限的降水资源大部分化为非目标性输出；储存在土壤里的降水通过蒸发大量损失；且现行的种植业结构及作物种群大多数用水效率低，农民科技素质低；更为普遍的是，土壤肥力低下，耕作管理粗放，严重制约了有限降水的资源化。
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| 关 键 词： | 制约因素 降水资源化 黄土高原 |
| 文章编号： | 1000-0275（2006）02-0157-04 |
| 收稿时间： | 2005-11-09 |
| 修稿时间： | 2005-11-092006-01-04 |
Analysis of Restricted Factors in the Process of Utilizing Precipitation Resource in Arid Regions of Loess Plateau |
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| HU Bing-hui,LIAO Yun-cheng,HE Jin-hong,CHENG Tian-jiao and YU Xi-shui.Analysis of Restricted Factors in the Process of Utilizing Precipitation Resource in Arid Regions of Loess Plateau[J].Research of Agricultural Modernization,2006,27(2):157-160. |
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| Authors: | HU Bing-hui LIAO Yun-cheng HE Jin-hong CHENG Tian-jiao and YU Xi-shui |
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| Institution: | Agronomy College, Northwest Sci-Tech University of Agriculture and Forestry, Yangling Shaanxi 712100,China |
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| Abstract: | Loess plateau is the important implement region of dry land agriculture in our country,and the water source of agriculture production mainly depends on precipitation.But the precipitation in this region is not only limited,but also badly-distributed;Many heavy rains and torrential rains,in addition to not level topography,cause much waste of limited precipitation resource;Much loss in saved precipitation through evaporation in soil,and the poor science and technology quality of farmer's;Besides,the low efficiency of utilization of water exists in current cropping system and most crop communities;More generally,the low soil nourishment and the increasing use of land to expand production on farming management strongly restrict the utilization of limited precipitation resource. |
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| Keywords: | restricted factors utilization of precipitation loess plateau |
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