论文部分内容阅读
随着农村产业结构的改革,粮田承包向专业化发展,务农劳力减少,粮食生产的简易栽培显得日益重要。为适应这种现状,我县于1985年进行了单季晚稻直播栽培试验示范,全县种植面积达5000多亩,取得了较好的效果。现就单晚直播稻的生育特性及其利弊作如下阐述。 (一)直播稻的生育特性 1.直播稻的播期受前茬作物收获期的制约,营养生长期缩短,主茎总叶数减少,穗型变小;但无移栽缓苗阶段,分蘖缺位少,成德率高,且低位(4～6位)分蘖与主茎同生历期长,分蘖穗产量比例增加。
With the reform of the industrial structure in rural areas, the specialization of grain contracting and the reduction of agricultural labor force will make the simple cultivation of grain production increasingly important. In order to adapt to this situation, our county in 1985 conducted a single season late rice direct seeding cultivation demonstration, the county planted area of 5,000 mu, and achieved good results. Now on the characteristics of one-night direct seeding rice and its advantages and disadvantages as described below. (1) The characteristics of reproductive performance of direct-seeding rice 1. The sowing date of direct seeding rice is restricted by the harvesting period of the former crop, and the vegetative growth period is shortened, the total number of main stems is reduced and the panicle size is reduced. However, Lack of vacancies, Chengde rate is high, and the low (4 to 6) tillering and main stems of the same life period, the tiller spike yield increased.