地理研究

地理研究 ›› 2001, Vol. 20 ›› Issue (5): 601-608.doi: 10.11821/yj2001050010

• 论文 • 上一篇    下一篇

黄土丘陵沟壑区作物生产潜力影响因素分析——以王家沟流域为例

李忠武1, 蔡强国1, 唐政洪1, 吴淑安1, 朱远达2   

  1. 1. 中国科学院地理科学与资源研究所, 北京 100101;
    2. 华中农业大学资源农化系, 武汉 430070
  • 收稿日期:2001-06-17 修回日期:2001-08-20 出版日期:2001-10-15 发布日期:2001-10-15
  • 作者简介:李忠武(1972-),男,湖南长沙人,博士研究生。主要从事精准农业及作物生产潜力的研究工作, 已发表论文5篇。
  • 基金资助:

    科技部国家重点科技(攻关)项目(95-019-01-01-01);中国科学院西部行动项目(KZCX1-10-04);加拿大国际发展总署(CIDA)资助中国-加拿大合作项目(SEMGISⅡ)

Factors affecting crop productivity in loess hilly-gully area──taking Wangjiagou watershed as an example

LI Zhong-wu1, CAI Qiang-guo1, TANG Zheng-hong1, WU Shu-an1, ZHU Yuan-da2   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Department of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2001-06-17 Revised:2001-08-20 Online:2001-10-15 Published:2001-10-15

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摘要：

针对黄土丘陵沟壑区土壤侵蚀非常严重、作物产量低而不稳以及农业生产力水平低下的特点,本文首先分析了近几年来王家沟流域不同种类和不同年份作物生产力变化的特征,然后在地理信息系统(GIS)技术支持下,利用基于土壤侵蚀条件下的YIELD作物生产力模型并结合各作物的实际观测资料,从降雨量、气温等气象因素以及地膜覆盖、施肥、梯田等耕作措施两方面分析了该小流域作物生产力变化的原因,结果表明在气象因素(大气降水)和土壤侵蚀的共同影响下,土壤水分和养分的变化是影响该区域作物生产力变化的主要制约因素。

关键词: 黄土丘陵沟壑区, 地理信息系统, 王家沟流域

Abstract:

Crop productivity model research is an important means to study agricultural production, but the universally low adaptability of the model limited its popularization and application. Since Geographic Information System (GIS) owns powerful function of analyzing, processing,managing and visualizing spatial data, it has been widely used in agricultural production. The loess hilly-gully area is one of the most serious soil eroded areas in the world and serious soil erosion has made soil quality degrade and land productivity drop. Aiming at characters of serious soil erosion and low and unstable crop productivity, this paper firstly introduces crop production of Wangjiagou watershed in recent ten years. Then, supported by GIS and aided with crop productivity mode YIELD model, combining actual observation data of crops, it analyzes reasons accountable for changes in agricultural production from two aspects of meteorologicfactors (precipitation, temperature) and farming practices, mulching fertilizing and terracing. The result showed that changes of soil moisture and soil nutrient affected by precipitation and soil erosion are the main factors influencing changes in crop productivities.Effective tillage measures can greatly enhance level of soil water and soil nutrient and promote crop productivities.

Key words: loess hilly-gully area, geographic information system, Wangjiagou watershed

PACS: 

  • S127