| 建立开放系统,发展西北半干旱地区农业 |
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| 引用本文： | 刘巽浩.建立开放系统,发展西北半干旱地区农业[J].自然资源学报,1989,4(1):12-18. |
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| 作者姓名： | 刘巽浩 |
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| 作者单位： | 北京农业大学 |
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| 摘 要： | 我国西北半干旱地区是我国农业中最不发达地区之一,其主要特征是封闭或半封闭式的有机农业传统,低投入、低功能、低产出。本文讨论了有争议的几种模式,提出了建立开放系统的原则与具体生产建议。
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| 关 键 词： | 封闭系统 开放系统 半干旱地区 有机农业滚雪球模式 |
ON ESTABLISHING A OPEN SYSTEM TO DEVELOPE AGRICULTURE IN THE NORTHWEST SEMI-ARID REGION IN CHINA |
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| Liu Xunhao.ON ESTABLISHING A OPEN SYSTEM TO DEVELOPE AGRICULTURE IN THE NORTHWEST SEMI-ARID REGION IN CHINA[J].Journal of Natural Resources,1989,4(1):12-18. |
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| Authors: | Liu Xunhao |
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| Institution: | Beijing Agricultural University |
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| Abstract: | The northwest semi-arid negion is one of the most undeveloped zones in China. It is characterized by the closed or simi-closed traditional organic farming with very low input, inefficient function and low output.In this paper several controvcrtille models of agriculture are discussed and some priciples for establishing a open system and concrete suggestions for developing production are presented. |
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| Keywords: | closed system open system semi-arid region organic farming model of rolling a snow ball |
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