CAJ | 학술논문

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。
위료학정작물장세요감감측적평개지표，이용2000—2012년길림성 EOS ／MODIS 수거，채용 NDVI 순최대치법，결합길림성주요농작물생장발육적특점，대주요산량구작물생장계한전화수전적 NDVI 시공변화규률진행연구，병분석기여기온화강수적관계。결과표명：2000—2012년길림성작물생장계농작물적 NDVI 수작물생장발육진정유명현적변화，수전화한전량충작물적 NDVI 시간변화균정단봉형；길림성불동구역적 NDVI 변화추세일치，5월상순지6월상순，NDVI 정완만증가적추세；6월중순지7월상순，NDVI 신속증가；7월중순지8월상순，NDVI 증가완만；8월중순개시，NDVI 개시하강。6월중순개시，길림성중부지구한전 NDVI 명현고우서부지구，NDVI 증장속솔중부지구대우서부지구，체도봉치적시간중부지구야조우서부지구。길림성수전 NDVI 변화중서부지구차이교소，균재8월상순체도봉치，식피지수시간변화여길림성작물생장발육진정상문합。길림성중서부지구작물적 NDVI 여기온화강수균정정상관，기온화강수대 NDVI 적영향유명현체후효응，차기온적영향대우강수。
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.