半干旱草原牧区村庄的农田扩张机制

应用生态学报

半干旱草原牧区村庄的农田扩张机制

张乐^1,2;刘志民¹

¹中国科学院沈阳应用生态研究所，沈阳 110016；²中国科学院研究生院，北京 100039

收稿日期:2007-06-08 修回日期:1900-01-01 出版日期:2008-05-20 发布日期:2008-05-20

Expansion mechanism of farmland at a village in Horqin steppe of northern China.

ZHANG Le^1,2;LIU Zhi-min¹

¹Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; ²Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Received:2007-06-08 Revised:1900-01-01 Online:2008-05-20 Published:2008-05-20

摘要/Abstract

摘要： 基于多层线性模型，从田块、单户和村庄3个尺度分析了科尔沁沙地西部半干旱草原牧区村庄的农田扩张机制.结果表明：在选择优质土地用于发展农业上，各住户间没有显著差异；家庭劳动力数量多、户主文化程度高和收入依赖于农牧业的住户更倾向开地种粮，而牲畜数量多的住户开地种粮的愿望较低；玉米的种植主要受限于外部经济因素，而水稻的种植主要受限于当地的自然状况.提高草原牧区的基础教育水平会促进草地向农田的转变，而转移牧区剩余劳动力将会延缓这一过程.

关键词: 高温热害, 动态指标, 早稻, 时空分布

Abstract: Based on a multilevel model, the expansion mechanism of farmland in Horqin steppe of northern China was studied at field, household, and village levels. The results showed that there was no significant difference among households in reclaiming the steppe. The households with extra labor force and relatively higher basic education tended to reclaim steppe if they lived mainly on cultivation and animal breeding, while those with large livestock number were not favorable for farmland expansion. Corn cultivation was more sensitive to economic situations, while rice planting was more constrained by natural conditions. Therefore, relatively good basic education might favor the conversion of grassland to farmland, while transferring residual labor forces might detain the trend.

Key words: heat stress, spatiotemporal distribution, double-early rice, dynamic indicator

张乐^1,2;刘志民¹. 半干旱草原牧区村庄的农田扩张机制[J]. 应用生态学报.

ZHANG Le^1,2;LIU Zhi-min¹ . Expansion mechanism of farmland at a village in Horqin steppe of northern China. [J]. Chinese Journal of Applied Ecology.

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