我省西部碳酸盐黑土地区包括松嫩平原中部低平原的明水、青岗、兰西、肇东,肇州、林甸等县。年降雨量450毫米左右,小麦生育前期的雨量很少,占年降雨量1/4。秋季降雨150～170毫米,较其他地区也少,很少发生涝害。小麦生育期间气温较高,出苗至抽穗期的气温为14～20℃,较这一时期的适宜温度上限高2℃,高温使出苗至抽穗 The western carbonate black soil areas in the province include the Mingshui, Qinggang, Lanxi, Zhaodong, Zhaozhou and Lindian counties in the low plain of the central Songnen Plain. Annual rainfall of about 450 millimeters, early wheat rainfall is very small, accounting for 1/4 of the annual rainfall. Autumn rainfall of 150 to 170 mm, less than other regions, rarely waterlogging. The temperature during the growth of wheat is higher, the temperature from emergence to heading is 14 ~ 20 ℃, which is 2 ℃ higher than the optimum temperature in this period,