水稻三高一稳栽培法对不同类型水稻品种的增产效果及高产机理

Study of yield increasing effect and mechanism of a new culture technique on different types of rice varieties.

水稻“三高一稳”栽培法是一项夺取水稻高产更高产的综合栽培技术新体系.通过两年研究,已明确该项技术对不同类型水稻品种均有明显的增产效果,其中多穗型和兼顾型品种的增产效果均较大穗型品种为大.水稻“三高一稳”栽培法比常规栽培法能取得显著增产,其机理主“要有:①水稻群体发展水平得到有效控制,成穗率大幅度提高;②能塑造水稻群体良好的冠层结构,光合效率高;③水稻个体生产潜力得到进一步开发,穗形明显增大;④物质生产和积累多,灌浆速度快,经济系数高.本文最后对该项技术的品种选用以及灌深水控蘖问题进行了讨论.

The new culture technique was a new system for integrated culture technique to achieve higher yields. The results showed that this new technique was effective on rice varieties with different panicle types. Varieties of multipanicle and medium large panicle types increased yield more than that of the large panicle type. Higher yields were achieved with this new technique as compared with the conventional one, and the yield increasing mechanism was as follow: (1) effective control of the development level of rice colony and increase of the percentage of productive tillers:(2) creation of a fine coronal lager structure of lice colony and increase of photosyn-thetic efficiency: (3) improvement of the productivity of individual plant resulting in the larger panicles; 0 production and accumulation of more dry matter, thus achieving the rapid milking and high harvest index. The questions of selecting suitable rice varieties and controlling ineffective tillers in deep irrigation were also discussed.