The multi-kernel support vector regression( MK-SVR) was used to construct remote sensing monitoring algorithmic models for estimating leaf area index( LAI) in wheat. The experiment was carried out during 2010—2013 in Jiangsu Province,China. Based on LAI in wheat and synchronous China's domestic HJ-CCD multi-spectral data at jointing stage,booting stage and anthesis stage respectively,the relationships between LAI and eight vegetation indices were analyzed at corresponding period. Taking these vegetation ind...