直播稻"武运粳八号"产量形成特征及其高产栽培途径

试验以武运粳八号为材料,通过设置不同肥料、密度处理对其产量与产量构成因素的影响进行了分析。结果表明:(1)施N量的提高、磷钾肥配比的增加能提高单位面积穗数、每穗颖花数和产量,基本苗的增加能提高单位面积穗数而降低了每穗颖花数;肥料、密度对结实率和千粒重影响不显著。(2)限制产量的主要因子是单位面积颖花量,提高产量途径是在形成适宜穗数的基础上增加每穗颖花数从而提高单位面积颖花量。(3)单位面积穗数与高峰苗相关显著与成穗率关系不密切;每穗颖花数与抽穗期干物质形成颖花能力相关密切,抽穗期干物质形成颖花能力与拔节至抽穗N素吸收量相关密切。

Characteristics of Direct-seeding Rice of Wuyunjing-8 Yield Producing and Analysis of Approach to High Yield

T he experiments were studied based o n Wuyunjing-8designed factors main ly conc erned planting density,the q uantum and data of nitrogen fertilizing and the ra tio of nitrogen and phosphate and P otassium.Main results were describ ed as fo llow:(1)Increased nitrogen and phosphate and potassiu m could significantly increased pan icles per area ,spikelets per ear and yield;increased planting d ensity increased panicles per area but decreased spikelets per ear.(2)As lon g as the yield was concerned,in creasing yield of Wuyunjing8mainly depended on incre asing spikelets per panicle and ears per area.(3)There were close cor relation betwee n climactic density and panicles per area ;spikelets per ear we re close correlation w ith capability of produing spikelets of heading dry matte r;there were close correlation betwee n capability of produing spikelets o f he ading dry matter and nitrogen absorbing from elongation to heading.