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不同密度不同耕作方式下的水稻叶片特性、干物质积累、分配及产量的研究表明:两种耕作方式下以高密度处理的叶面积指数最高,叶面积比率和比叶面积以中密度处理较高。随密度增加日产干重增大,水稻生长后期日产干重略低于对照。整个生育期中,干物质在茎鞘和叶片的分配呈下降趋势,在后期以中密度分配最高,穗中的分配以低密度最高。中、低密度下的结实率、实粒数高于高密度,免耕高桩抛秧高密度处理的产量最高。因此,增加抛栽密度有利于免耕高桩抛秧稻产量的提高。
The study on leaf characteristics, dry matter accumulation, distribution and yield of rice under different tillage and tillage patterns showed that under the two tillage methods, the leaf area index under high density treatment was the highest, leaf area ratio and specific leaf area were higher at medium density . The dry weight of Nissan rice increased with the increase of density, and the dry weight of Nissan rice at the later stage of rice growth was slightly lower than that of the control. During the whole growth period, the distribution of dry matter in stems and leaves showed a downward trend, followed by medium density in the late stage and highest in low-density in the ear. The medium and low density seed setting rate, real number of grain is higher than the high density, no-tillage high-pile throwing high-density treatment yield the highest. Therefore, increasing throwing planting density is conducive to raising no-tillage high-pile throwing rice production.