水稻品种的更新是提高产量和品质的有效途径,而从同地或异地引种是更新品种的有效途径。但从异地引种,必须注意以下五点,以免造成损失。一、从外地引种,首先必须考虑品种的感温、感光性能和基本营养生长性。对感温性强的品种,要着重考虑当地水稻生长季节内有效积温能否满足其要求;对感光性 The update of rice varieties is an effective way to improve yield and quality, and introduction from the same place or different places is an effective way to update the varieties. However, introduction from different places, we must pay attention to the following five points, so as to avoid losses. First, introduced from the field, we must first consider the variety of temperature, light sensitivity and basic nutritional growth. On the strong temperature-sensitive varieties, we must focus on the local rice growth season effective accumulated temperature can meet their requirements; sensitivity