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水稻抽穗结实期的生长中心是种子的形成。此时,穗数与颖花数已成定局,而实粒数尚在变动之中,千粒重正在形成。故本期的增产任务为提高结实率,增加粒重。鉴于此时各器官中的营养物质,主要向穗部运输。为了达到籽实饱满的目的,及时追施,有助于促进淀粉、蛋白质的形成与转移。本试验以不同浓度的磷酸二氢钾、硫酸锌与卅烷醇乳剂配成不同浓度组合的混合液,进行根外追肥。按照正交试验设计的方案,安排田间试验,探讨各因素对增产的效应及其最优的水平组合。
The growth center of rice heading stage is seed formation. At this point, the number of spikes and spikes is a foregone conclusion, while the actual number of particles are still changing among thousands of grain weight is taking shape. Therefore, the current production increase task is to increase the seed-bearing rate and increase the grain weight. In view of the nutrients in various organs at this time, the main transport to the spikes. In order to achieve the full purpose of the seeds, timely chasing, help to promote the formation of starch and protein and transfer. In this experiment, different concentrations of potassium dihydrogen phosphate, zinc sulfate and 卅 alkanol emulsion dubbed a mixture of different concentrations of combination, for root top dressing. In accordance with the orthogonal test design scheme, field trials were arranged to explore the effects of various factors on yield increase and its optimal combination of levels.