Sui Yue, Huang Wan-Hua, Yang Xiao-Guang, Li Mao-Song
College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
Ying Yong Sheng Tai Xue Bao. 2012 Sep;23(9):2467-76.
In recent years, seasonal drought occurs frequently in southern China, giving severe impact on the production of local wintering crops. Based on the 1959-2009 meteorological data from 268 meteorological stations in southern China, and by using crop water deficit index (CWDI) as agricultural drought index, this paper analyzed the spatiotemporal characteristics of drought for winter wheat and rapeseed. The results showed that in southern China, drought happened more frequently in Southwest China, north Huaihe basin, and parts of South China during the developmental stages of wintering crops. In the mid-lower Yangtze basin, the intensity and extent of drought increased during the mid-late developmental stages of winter wheat, and became much heavier at its later developmental stages. For rapeseed, the intensity and extent of drought increased during the developmental stage before winter and the late developmental stages. In southwest part, the intensity and extent of drought increased significantly during the developmental stage before winter for winter wheat and rapeseed. Since the early 1990s, the intensity and extent of drought in southern China increased during the mid-late developmental stages of wintering crops.
近年来，中国南方季节性干旱频繁发生，对当地越冬作物生产造成严重影响。基于中国南方268个气象站1959 - 2009年的气象数据，以作物水分亏缺指数（CWDI）作为农业干旱指标，分析了冬小麦和油菜干旱的时空特征。结果表明，中国南方越冬作物生长发育期内，干旱在西南地区、淮河以北流域及华南部分地区发生更为频繁。在长江中下游流域，冬小麦生长中后期干旱强度和范围增加，在生长后期更为严重。对于油菜，干旱强度和范围在越冬前生长发育期及生长后期增加。在西南部，冬小麦和油菜越冬前生长发育期干旱强度和范围显著增加。自20世纪90年代初以来，中国南方越冬作物生长中后期干旱强度和范围增加。
