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在高产条件下,小麦群体指标因栽培条件的不同而有较大变幅。播期、密度、肥料是这些变幅的主要可控因子。高产田冬前的群体茎蘖动态可用有效积温和基本苗进行描述。分蘖高峰出现期及峰值的高低与最高叶面积指数及出现期,是衡量群体数量和素质的重要指标。开花期地上部干物重既是高产的物质基础,又可作为衡量群体数量的重要指标。提高开花后的干物质积累最是实现高产稳产的有效途径。亩产500千克小麦,开花后的干物质积累量必须达450千克/亩以上。
Under high-yielding conditions, the wheat population index due to different cultivation conditions have larger amplitude. Sowing date, density, and fertilizer are the main controllable factors for these fluctuations. The dynamics of stem tiller in high-yielding field before winter can be described by effective accumulated temperature and basic seedling. Peak tillering peak and peak height and leaf area index and emergence period, is an important indicator of population quantity and quality. The dry matter weight at the top of flowering stage is not only the material basis of high yield, but also an important index to measure the population quantity. Increasing the accumulation of dry matter after flowering is the most effective way to achieve high and stable yield. 500 kg of wheat per mu yield, dry matter accumulation after flowering must reach 450 kg / acre above.