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龙里县属于黔中高原的一个山区。全县大体可分为温暖、温凉、温寒、高寒4个气候类型。年均温14.8℃,常年降雨量1000mm左右,年均日照1259小时,阴天多,平均日照率为27.7％,无霜期270天左右。水稻播种阶段,因位于冷暖气流交锋面,温度变化大,常遭倒春寒威胁,发生不同程度的烂秧。因此,在水稻生产上常被迫延迟播种及栽插,致使这类稻田的产量不高不稳,是生产上需要解决的技术问题。这类稻田全县约
Longli County belongs to a mountainous area in the Central Guizhou Plateau. The county can be broadly divided into warm, warm cool, warm, alpine four climate types. The average annual temperature of 14.8 ℃, annual rainfall of about 1000mm, annual average 1259 hours of sunshine, more cloudy, the average sunshine rate of 27.7%, 270 days frost-free period. Rice sowing stage, due to the intersection of cold and warm air confrontation, temperature changes, often threatened by spring down, different degrees of rotten seedlings. Therefore, in rice production, it is often delayed for sowing and planting. As a result, the yield of such rice fields is not high and unstable, which is a technical issue to be solved in production. This type of rice fields around the county