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旱直播水稻是稻、麦两熟机械化栽培的技术途径之一,南通市1986年示范种植了3680亩,平均亩产460公斤,显示了一定的可行性和增产潜力。南通市的单季稻前茬多为早熟或中熟小麦,由于成熟期不同以及冬、春的温、光条件不同,小麦收割后免(少)耕直播水稻的日期在年际间常有4～6天的差异;如在夏收期间遇有连阴雨,也可能延误旱直播水稻的适宜播期。针对此问题,1986年对旱直播水稻进行不同播期与播量的两因素随机区组试验,以探索小麦茬早直播水稻的播期和播量两个因素对产量的影响,找出两因素间的交互作用,即在推迟播种的情况下,相应增加播量是否能抵消迟播的影响。
Drought direct seeding rice is one of the technical ways for mechanized cultivation of rice and wheat. Nantong City demonstrated planting 3680 mu in 1986 with an average yield of 460 kg per mu, demonstrating a certain feasibility and yield potential. Due to the different maturity period and different temperature and light conditions in winter and spring, the dates of direct (or less) tillering of wheat after harvesting in wheat are often between 4 and 6 Day differences; such as during the summer harvest in the rainy days may also delay the sowing date broadcast sowing of rice. In response to this problem, two-factor randomized block trials of different sowing date and sowing date on direct seeding rice were conducted in 1986 to explore the effect of sowing date and sowing date on the yield of early sowing rice. Two factors Interactions between the effects of late sowing and late sowing could be counteracted by a corresponding increase in sowing.