吉林省主要产粮区NDVI时空变化特征  

Spatial-temporal characteristics of NDVI over main grain producing area in Jilin province

作　　者：唐晓玲[1] 任红玲[1] 王杰[1] 刘珂[1] 王颖[1] 

机构地区：[1]吉林省气象科学研究所,吉林长春130062

出　　处：《气象与环境学报》2015年第2期103-107,共5页Journal of Meteorology and Environment

基　　金：吉林省科技发展计划项目(20080427;20140204052SF)资助

摘　　要：为了确定作物长势遥感监测的评价指标,利用2000—2012年吉林省EOS/MODIS数据,采用NDVI旬最大值法,结合吉林省主要农作物生长发育的特点,对主要产粮区作物生长季旱田和水田的NDVI时空变化规律进行研究,并分析其与气温和降水的关系。结果表明:2000—2012年吉林省作物生长季农作物的NDVI随作物生长发育进程有明显的变化,水田和旱田两种作物的NDVI时间变化均呈单峰型;吉林省不同区域的NDVI变化趋势一致,5月上旬至6月上旬,NDVI呈缓慢增加的趋势;6月中旬至7月上旬,NDVI迅速增加;7月中旬至8月上旬,NDVI增加缓慢;8月中旬开始,NDVI开始下降。6月中旬开始,吉林省中部地区旱田NDVI明显高于西部地区,NDVI增长速率中部地区大于西部地区,达到峰值的时间中部地区也早于西部地区。吉林省水田NDVI变化中西部地区差异较小,均在8月上旬达到峰值,植被指数时间变化与吉林省作物生长发育进程相吻合。吉林省中西部地区作物的NDVI与气温和降水均呈正相关,气温和降水对NDVI的影响有明显滞后效应,且气温的影响大于降水。Using EOS /MODIS data from 2000 to 2012,spatial-temporal characteristics of NDVI（Normalized Difference Vegetation Index）in dry farmland and paddy field over the main grain producing areas in Jilin province were analyzed by a ten-day maximum method in order to monitoring crop growth,and its relationship with precipi-tation and temperature were discussed.The results show that NDVI has a remarkable variation with the growth of crop during growth season from 2000 to 2012,and NDVI-time curves of crop in dry farmland and paddy filed both are a single peak.Trends of NDVI in different regions are similar,i.e.,NDVI increases slowly from first ten-day of May？to first ten-day of June;it increases rapidly from the middle ten-day of June to first ten-day of July and then increases gradually from the middle ten-day of July to first ten-day of August;it decreases in the middle ten-day of August.NDVI in dry farmland is higher in the middle than in the west of Jilin province after the first ten-day of June,and its increase rate is also faster and the time of peak is earlier.However,NDVI in paddy field has no signif-icant differences between the central and the west,and both reach peak values in the first ten-day of August.There is a good relationship between variation of NDVI and crop growing.NDVI of main crops in mid-west regions of Ji-lin province has a positive correlation with temperature and precipitation,and a lag-effect of temperature and pre-cipitation on NDVI is significant.In addition,the effect of temperature is greater than that of precipitation.

关 键 词：主要产粮区 NDVI 遥感监测 

分 类 号：P405[天文地球—大气科学及气象学]