一、水稻坐蔸情况我省常年水稻栽插面积近5千万亩,坐蔸约5百万亩。钙质土水稻坐蔸面积较大,约350万亩。坐蔸后一般一亩损失稻谷100斤,低温年损失更大。近年随着化肥施用的增加,坐蔸面积不断扩大,病情加重,采用 First, the situation of rice sit 我 perennial rice planting area in our province nearly 5 million mu, sit 蔸 about 5 million mu. Calcareous soil rice sitting area is larger, about 3500000 mus. Sit after the general mu of rice loss of 100 pounds, the greater the loss of low temperature. In recent years, with the increase of the application of chemical fertilizers, the area of ​​sitting pincers has been continuously enlarged and the condition has been aggravated