CAJ | 학술논문

复种指数反映了耕地的利用强度，利用遥感方法提取耕地复种指数可为农业产业结构调整和粮食安全保障提供科学依据。采用SPOT/VGT NDVI时序数据（2001-2007年）和MOD13Q1 NDVI时序数据（2001-2011年）作为遥感数据源，利用HANTS滤波和SG滤波方法分别对两种数据源进行数据重构，进而提取出陕西省10个地（市）的耕地复种指数；根据提取结果，分析各地市复种指数的变化规律，进而对比两种方法在耕地复种指数提取过程中的效果。结果表明：两种方法均能较好地反映复种指数的变化趋势；SG滤波后提取结果普遍高于HANTS滤波后提取结果；2001-2011年，延安市和榆林市复种指数增长较快，西安市复种指数出现负增长；2007年之后，铜川、宝鸡、咸阳、渭南复种指数开始出现负增长。
복충지수반영료경지적이용강도，이용요감방법제취경지복충지수가위농업산업결구조정화양식안전보장제공과학의거。채용SPOT/VGT NDVI시서수거（2001-2007년）화MOD13Q1 NDVI시서수거（2001-2011년）작위요감수거원，이용HANTS려파화SG려파방법분별대량충수거원진행수거중구，진이제취출합서성10개지（시）적경지복충지수；근거제취결과，분석각지시복충지수적변화규률，진이대비량충방법재경지복충지수제취과정중적효과。결과표명：량충방법균능교호지반영복충지수적변화추세；SG려파후제취결과보편고우HANTS려파후제취결과；2001-2011년，연안시화유림시복충지수증장교쾌，서안시복충지수출현부증장；2007년지후，동천、보계、함양、위남복충지수개시출현부증장。
The multiple cropping index reflects the degree of arable land utilizing intensity at a certain period .Ex-tracting multiple cropping index by remote sensing method could provide scientific basis for agricultural industrial struc-ture adjustment and food security .We adopted the SPOT/VGT NDVI time-series data (2001-2007 ) and MOD13Q1 NDVI time-series data (2001-2011 ) for the remote sensing data sources , reconstructed the data for these two data sources by using the HANTS filter and Savitzky-Golay filter method ,and then extracted the multiple cropping indexes of 10 cities in Shaanxi Province .According to the extracted results ,analyzed the variation rule of the multiple cropping in-dex in each city ,and then compared the effects of two methods for extracting the multiple cropping indexes .The result showed that :Both methods can be better reflected the change trend of the multiple cropping index .The extraction result of Savitzky-Golay filter was generally higher than the HANTS filter .The multiple cropping index was increased obvious quick in Yulin city and Yan’an city from 2001 to 2011 ,while the figures in Xi’an city has been shown a negative in-crease .After 2007 ,the multiple cropping indexes were begun to appear the negative increase in Tongchuan ,Baoji ,Xi-anyang and Weinan .