| 基于降水资源特征分析的西北半干旱区小流域种植业结构的调整——以定西市九华沟流域为例 |
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| 引用本文： | 贵立德.基于降水资源特征分析的西北半干旱区小流域种植业结构的调整——以定西市九华沟流域为例[J].安徽农业科学,2009,37(31):15502-15503. |
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| 作者姓名： | 贵立德 |
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| 作者单位： | 甘肃省定西市水土保持科学研究所,甘肃定西,743000 |
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| 摘 要： | 根据研究区降水少、变率大、旱灾频繁的基本规律，特别是降水季节分配不均、有效性差的降水资源特征，得出西北半干旱地区降雨对作物产量的影响不仅与年降雨量的多寡相关，而且与降雨的时空分布有极大关系。分别就夏粮作物、秋粮作物单产量与年降雨量和作物生长期降雨量的相关程度，讨论了九华沟流域种植业结构的调整。
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| 关 键 词： | 降水资源特征 西北半干旱区 种植业结构调整 |
Adjustment of the Small Watershed Planting Structure in Northwest Semiarid Regions Based on the Analysis of the Precipitation Resource Characteristics |
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| GUI Li-de.Adjustment of the Small Watershed Planting Structure in Northwest Semiarid Regions Based on the Analysis of the Precipitation Resource Characteristics[J].Journal of Anhui Agricultural Sciences,2009,37(31):15502-15503. |
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| Authors: | GUI Li-de |
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| Institution: | GUI Li-de(Dingxi Institute of Soil , Water Conservation Science in Gansu Province,Dingxi,Gansu 743000) |
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| Abstract: | According to the basic laws of less precipitation,high variable rate,frequent droughts in the study area,especially,the characteristics of precipitation resources(the uneven seasonal distribution of the precipitation and poor effectiveness),a conclusion was drawn that the effects of precipitation in northwest semiarid areas on the crop yield was not only related to the amount of annual rainfall,but it was also related to the space and time distribution of precipitation.The adjustment of planting structure i... |
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| Keywords: | Precipitation resource characteristics Northwest semiarid regions Adjustment of planting structure |
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