黑龙江省水稻主栽品种热量指标鉴定及适宜种植区划

根据分期播种试验资料，利用最小二乘法计算了黑龙江省主栽水稻品种各生育期所需有效积温和生育期下限温度等热量指标；利用1971—2000年全省81站逐日气象资料，在50km×50km网格上内插得到水稻生育期活动积温和可能生育期日数的空间分布，与各主栽品种全生育期活动积温、生育期Et数的实测值对比，结合黑龙江省水稻低温冷害的分布特征，将黑龙江省水稻适宜栽培区初步划分为五类，得到各水稻主栽品种的适宜分布区域，结果可为充分利用当地气候资源、指导水稻生产提供参考。

Identification of Thermal Indexes and Region Division of the Main Cultivated Rice Varieties in Heilongjiang Province

Based on the sowing test data by stages, the thermal indexes, such as the active accumulated temperature and minimum limit temperature in each growing period of rice were calculated for the main cultivated rice varieties in Heilongjiang Province, by using the Least Squares Method. The spatial distributions of thermal resource and the possible days of growing period were obtained by interpolated meteorological data in the 50km x 50km grid, based on the daily meteorological data of 81 stations from 1981 to 2002 in Heilongjiang Province, and compared with the ob- served active accumulated temperature and days of growing period for the main cultivated rice varieties. With the distributed characteristic of chilling injury, the rice production zone in Heilongjiang Province was divided into five production zones, and suitable planting zones for the main cultivated rice varieties were discussed. The results can provide reference to the full use of local climate resources for guiding rice production.