内蒙古中东部地区耕地物候动态研究  

Variation of Cropland Phenology in Mid-eastern Inner Mongolia

作　　者：陶健[1,2] 张戈丽[2] 王军邦[2] 董金玮[1,3] 

机构地区：[1]农业部资源遥感与数字农业重点开放实验室,中国北京100081 [2]中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室,中国北京100101 [3]俄克拉荷马大学植物与微生物学院空间分析中心,美国俄克拉荷马州73019

出　　处：《中国农业科学》2011年第22期4583-4592,共10页Scientia Agricultura Sinica

基　　金：农业部资源遥感与数字农业重点开放实验室开放课题(RDA0903)

摘　　要：【目的】采用遥感手段监测内蒙古中东部地区耕地物候变化,探讨气候变化导致耕地物候变化进而对耕地生产力的影响。【方法】采用趋势分析监测研究区耕地物候变化及生产力变化,根据空间相关分析及显著性检验分析气候变化导致生长季变动对耕地生产力的影响。【结果】研究区内耕地生长季明显延长;生长季提前开始且延迟结束区域最大,其次为生长季延迟开始且提前结束区域;研究区耕地物候受温度、降水影响明显;空间上,耕地生长季缩短受降水负相关影响显著,并且受降水影响显著的耕地净初级生产力增幅较小且波动较大,而受温度影响显著耕地的净初级生产力稳定且明显提高。【结论】遥感技术能够整体把握区域耕地物候空间特征;物候对于温度和降水的响应均较明显,气候变化改变耕地物候进而影响生产力。【Objective】Using RS technique,this paper monitored phonological trend of cropland in mid-eastern Inner Mongolia,and analyzed the influences of temperature and precipitation on phenology thereby potential influences on net primary productivity（NPP）.【Method】Variation of cropland phenology and productivity was analyzed by trend analysis.The influences of climate change on NPP were explored by spatial correlation and significance analysis.【Result】Cropland phenology of most cropland lengthened obviously.Regions with advanced starting and delayed ending occupied the maximal percentage,followed by delayed starting and advanced ending,phenology variation was sensitive to temperature and precipitation spatially,growing season was shortened by precipitation significantly thereby resulting in decrease and large fluctuation of NPP.Inter annual NPP of cropland significantly influenced by temperature increased steadily and apparently.【Conclusion】Cropland phenology could be addressed by remotely sensing technique.Response of cropland phenology to temperature and precipitation evidently,and NPP was affected by climate change according to that.

关 键 词：内蒙古中东部 物候 耕地 MODIS 生长季 气温 降水 生产力 

分 类 号：Q948[生物学—植物学]