| 李光录,高存劳.黄土高原南部土地生产力及其与侵蚀的关系[J].干旱地区农业研究,2007,(4):42~46 |
| 黄土高原南部土地生产力及其与侵蚀的关系 |
| Property of land productivity and its relationship with soil erosion on the Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2007.04.08 |
| 中文关键词: 土壤侵蚀 土地生产力 流域 黄土高原 |
| 英文关键词:erosion land productivity watershed loess plateau |
| 基金项目:教育部留学回国基金; 西北农林科技大学校长基金 |
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| 中文摘要: |
| 使用PI模型对泥河沟流域土地生产力特征及其与侵蚀的关系进行了研究。结果显示：泥河沟流域土地生产力的变化差异很大，总体上以林地最高，果园和草地次之，农地最低；整个流域土地生产力呈现出以村庄为中心辐射状递减（农地）和斑状交错（果园）分布特征，土地生产力随着土壤侵蚀强度增大呈现指数规律减小。农地生产力水平很低，其变化范围从0.042到0.211，平均值为0.125，仅相当于无侵蚀旱地的四分之一，且农地生产力与冬小麦产量具有密切线性相关关系。 |
| 英文摘要: |
| Through using the model of productivity index，this paper studies the property of land productivity and its relationship with soil erosion on a watershed of the southern Loess Plateau. The results show that various of land productivities between different land types in Nihegou Watershed are very great, land productivities for forest land are highest, wild meadow and orchard land middies, and farmland are lowest; On whole Watershed, the land productivity for farmland drops off from village to the edge of watershed, and general decreases as the soil erosion intensity increases. The land productivity of farmland change from 0.042 to 0.211，its average value is 0.125，only is a fourth on the no-erosion dry land，the land productivity has a very good linear correlation with the corresponding winter wheat yield. |
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