Sui Yue, Huang Wan-Hua, Yang Xiao-Guang, Li Mao-Song
College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
Institute of Agriculture Resource and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Ying Yong Sheng Tai Xue Bao. 2013 Sep;24(9):2590-8.
Based on the 1959-2008 meteorological data from 249 meteorological stations in southern China, and by using crop water deficit index (CWDI) as the agricultural drought index, this paper calculated the drought frequency and drought stations ratio in this region, and analyzed the spatiotemporal distribution characteristics of drought for spring maize and summer maize during their growth periods. As for the spatial pattern of drought frequency, the drought for spring maize was more severe in the north of Huaihe River, northern Yunnan, and southern South China, but was lighter in the other regions. Except that the drought for summer maize at its late developmental stage was more severe in the middle-lower reaches of Yangtze River, northern South China, and eastern Southwest China, the drought for summer maize at its other developmental stages within southern China was lighter. As for the variation trend of drought intensity and drought area, the drought intensity of spring maize from its seven-leaf stage to jointing stage in the middle-lower reaches of Yangtze River increased obviously, while the drought intensity and drought area of the spring maize from its late spinning stage to milky maturity stage presented a decreasing trend. The drought of summer maize from its late jointing stage to tasseling stage and from late spinning stage to milky maturity stage all showed a decreasing trend. In Southwest China, the drought intensity and drought area for spring maize and summer maize had no clear trend. From the viewpoint of the inter-annual and decadal variability of drought intensity and drought area, there was a larger variation for the summer maize in the middle-lower reaches of Yangtze River, but less difference in Southwest China.
基于中国南方249个气象站1959 - 2008年的气象数据，以作物水分亏缺指数（CWDI）作为农业干旱指标，计算了该地区的干旱频率和干旱站次比，分析了春玉米和夏玉米生育期干旱的时空分布特征。就干旱频率的空间格局而言，淮河以北、云南北部和华南南部的春玉米干旱较为严重，其他地区则较轻。除长江中下游、华南北部和西南东部夏玉米发育后期干旱较为严重外，中国南方其他发育阶段的夏玉米干旱较轻。就干旱强度和干旱面积的变化趋势而言，长江中下游地区春玉米从七叶期到拔节期干旱强度明显增加，而春玉米从抽雄后期到乳熟期干旱强度和干旱面积呈下降趋势。夏玉米从拔节后期到抽雄期以及从抽雄后期到乳熟期干旱均呈下降趋势。在西南地区，春玉米和夏玉米的干旱强度和干旱面积无明显趋势。从干旱强度和干旱面积的年际和年代际变化来看，长江中下游地区夏玉米变化较大，而西南地区差异较小。
