CAJ | 학술논문

利用卫星遥感归一化植被指数（NDVI）时间序列数据和站点气象数据，从农作物生长发育过程的角度，分析了1981～2008年华北平原农田在12个生长发育期（冬小麦8个、夏玉米4个）对降水和温度不同的响应特征。研究区农田植被指数对降水响应的滞后性强于对温度的滞后性，其中对降水最为敏感的是前1和前2个生长发育期，对温度最为敏感的是同期和前1个生长发育期。不同种类作物在不同时期对气候因子响应不同：冬小麦发育中后期、夏玉米发育中期，绝大多数站点植被指数与降水呈正相关；冬小麦生长发育前中期植被指数与温度呈显著甚至极显著正相关。冬小麦出苗期温度、返青期温度和返青期降水分别与不同时期植被指数显著相关，出苗期和返青期为研究区农田长势对气候因子响应的敏感期。
이용위성요감귀일화식피지수（NDVI）시간서렬수거화참점기상수거，종농작물생장발육과정적각도，분석료1981～2008년화북평원농전재12개생장발육기（동소맥8개、하옥미4개）대강수화온도불동적향응특정。연구구농전식피지수대강수향응적체후성강우대온도적체후성，기중대강수최위민감적시전1화전2개생장발육기，대온도최위민감적시동기화전1개생장발육기。불동충류작물재불동시기대기후인자향응불동：동소맥발육중후기、하옥미발육중기，절대다수참점식피지수여강수정정상관；동소맥생장발육전중기식피지수여온도정현저심지겁현저정상관。동소맥출묘기온도、반청기온도화반청기강수분별여불동시기식피지수현저상관，출묘기화반청기위연구구농전장세대기후인자향응적민감기。
The heterogeneous responses of cropland Normalized Difference Vegetation Index (NDVI) to temperature and precipitation were analyzed using Advanced Very High Resolution Radiometer (AVHRR) NDVI time series and station-observed climate data from 1981 to 2008 during 12 phenophases including eight for winter wheat and four for summer maize over the North China Plain. The results showed that the lagged response of NDVI to precipitation was more noticeable than that to temperature and that NDVI was more sensitive to the precipitation (temperature) during the last and previous two phases (current and last phases). Additionally, the response varied among crop species and phenophases. The correlation coefficients between NDVI and precipitation were positive at most sites in the mid-late growing season (medium growing season) of winter wheat (summer maize). NDVI was also positively correlated to temperature at the significance level of 0.05 in the early-mid growing season of winter wheat. Furthermore, NDVI was strongly related to temperature (precipitation) during germination and turning-green (turning-green) phases. Therefore, germination and turning-green were the phases during which crop growing was largely influenced by climatic factors in the region.