1.头季稻收割过早,会降低头季稻和再生稻产量。除品种、播期、栽插密度和施肥等重要因素外,头季稻收割时机的把握也对两季稻谷产量有明显影响。据重庆市作物研究所等单位多年试验结果表明,头季稻在8月10～20日收割,每提早1天,头季稻亩产减少5.6公斤,再 1. Early harvesting of first season rice will reduce the yield of first season rice and ratoon rice. In addition to the important factors such as the variety, sowing date, planting density and fertilization, the grasping timing of the first season rice harvest also had a significant impact on the yield of the second season rice. According to the Chongqing Crop Research Institute and other units for many years test results show that the first season of rice in the August 10 to 20 harvest, one day earlier, the first season of rice per mu reduction of 5.6 kg, and then