南方冬麦区范围辽阔,包括长江中下游冲积平原、淮南平原和丘陵、江南平原和丘陵、汉水流域、云贵中北部、四川盆地、河南省南部、陕西汉中盆地和金沙江下游广大地区。本区气候温和,雨水充沛,年平均气 The southern winter wheat area has a vast area including the alluvial plain, the Huainan Plain and hills, the southern Yangtze Plain and hills, the Han River basin, the north-central Yunnan-Guizhou region, the Sichuan Basin, the southern Henan Province, the Hanzhong Basin in Shaanxi and the vast areas in the lower reaches of the Jinsha River in the middle and lower reaches of the Yangtze River. This area has a mild climate, abundant rainfall, the average annual gas