湖北省江陵县位于长江中游的冲积平原,年降雨量1,200毫米,年平均温度16℃,无霜期260天左右。沿江两岸,有5万余亩轻沙土与砾质粗沙土田,腐植质少,地力差,pH7.5左右,种植 Jiangling County, Hubei Province is located in the alluvial plain in the middle reaches of the Yangtze River. Its annual rainfall is 1,200 mm, annual average temperature is 16 ℃ and frost-free period is about 260 days. There are more than 50,000 mu of light sandy soil and gravelly coarse sand soil along the banks of the river, with less humus, poor soil strength, about pH7.5, planting