摘要
上地利用变化不仅影响区域灾情的结构与类型，还深刻影响其灾情程度．本文以处在北方农牧交错带中段、深受旱灾影响的内蒙古乌兰察布盟为案例，基于统计资料及野外调查，剖析了在气候干旱化程度加剧、农作物成灾面积在波动中增大的趋势下，粮食产量在波动中增长的机理．结果表明，在上地利用中，粮食作物种植结构及其面积比例的调整，增强了粮食生产系统抵御农业自然灾害的能力。因此，调整上地利用结构是一种有效的减灾措施．
Land use change influences deeply on not only the structure and type but also the levelof the regional natural disaster. The paper takes Wulanchabu League of Inner Mongolia in China as anexample, which is situated in the middle of northern farming-pastural region and is affected deeply bynatural hazard. Based on the statistical data and field survey, the mechanism that grain crop yield isincreasing while the climate shows a fluctuation with drought tendency is presented. The main resultsshow as fellows.1 Tw as fellows.ence of land use change on agricultural natural disaster is to change relatively theagricultural vulnerability for natural hazard.2 The research on the example of Wu League shows that the increasing ability to fight disaster of theagricultural production displays chiefly the increasing of per unit area yield. But the grain yield is affected deeply by regional physical geography. To increase regional capability of disater reduction is keystrategy of ecological security construction.3 In the semi-arid region, the increasing the cultivated area proportion of the drought-resistant andhigh-yield grain contributes to reducing the vulnerability of grain production system. The change ofland use structure is an effective and feasible mitigation measure.
出处
《自然灾害学报》
CSCD
1999年第1期1-8,共8页
Journal of Natural Disasters
基金
国家自然科学基金
国家自然科学基金
