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研究针对影响四川盆地麦玉稻 3熟改制成功的制约因素 ,经 1996— 1999年研究 ,技术上取得了两大突破 :一是玉米超常早播 ,在春播基础上提早 4 0～ 5 0d播种 ,适龄移栽 ,实现了玉米早收高产 ,并为后茬水稻创造了条件 ,使 3熟衔接成为可能 ;二是水稻穿林旱直播 ,比晚稻正常播期推迟2 0～ 30d播种 ,实现了水稻晚播早熟 ,稳产高产 ,使 3熟衔接更趋完善。两项突破是攻克 3熟衔接难点 ,实现吨粮目标的关键技术。 1998— 1999年 9地市农科所麦玉稻 3熟改制生产试验田平均单产 10 13.0kg/ 6 6 7m2 和 10 6 7.2kg/ 6 6 7m2 ,高产田单产达到 12 0 8.1kg/ 6 6 7m2 ,其中玉米行穿林旱直播水稻 5 2 3.9kg/ 6 6 7m2 。
The research aimed at influencing the restricting factors of the success of the three-cropping reform of wheat-yuedi rice in the Sichuan Basin. From 1996 to 1999, two breakthroughs were made in technology: one is early maize super-sowing, sowing 40-60d early on the basis of spring sowing, Age-appropriate transplanting achieved corn yield early, and to create the conditions for the rice after the crop, so that the three ripening possible; Second, the forest through the forest drought broadcast, delayed sowing 20 to 30 days later sowing, to achieve the rice Sowing early maturity, stable and high yield, so that 3 cooked convergence more perfect. Two breakthroughs are the key technologies to overcome the difficulties in meeting the targets and achieving the goal of delivering tons of grain. From 1998 to 1999, the average yield of trial plots of wheat-yueyao 3 crops in 10 prefectures and cities was 10 13.0kg / 667m2 and 106.2kg / 667m2, and the yield per plant in high-yield field reached 120.17kg / 667m2. Among them, the maize line through forest drought direct seeding rice 5 2 3.9kg / 6 6 7m2.