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以超级稻Q优6号为材料,研究2个氮肥施用量和4个栽培密度下水稻的群体茎蘖动态、叶面积动态、物质生产特性及产量构成特点。结果表明,在225kgN/hm2施氮水平内,施氮水平相同时,随着密度增加,单穴的茎蘖数和有效穗数、单穴叶面积、单穴干物质重、每穗粒数减少,而单位面积的茎蘖数和有效穗数、叶面积指数、单位面积干物质重增加。种植密度相同时,增施氮肥能促进分蘖,增加有效穗数、单穴叶面积、叶面积指数和干物质积累。低密度(A1、A2)种植时,增施氮肥能提高产量,高密度(A3、A4)种植时,增施氮肥会引起减产。当移栽穴数为30.0万穴/hm2、施纯氮150kg/hm2时,既能降低生产成本,又能实现高产。
The super rice Qyou 6 was used to study the dynamics of stem and tiller dynamics, leaf area dynamics, material production characteristics and yield components of two rice cultivars at two nitrogen rates and four planting densities. The results showed that under the nitrogen application rate of 225kg N / hm2, with the same nitrogen application rate, with the increase of density, the number of tillers per plant, the number of effective panicle, single leaf area, , While the number of tillers and effective panicles per unit area, leaf area index, dry matter weight per unit area increased. The same planting density, nitrogen application can promote tillering, increase effective panicles, single-leaf area, leaf area index and dry matter accumulation. In the low-density (A1, A2) planting, nitrogen application increased the yield, while high-density (A3, A4) When the number of transplanting is 300,000 points / hm2, applying pure nitrogen 150kg / hm2, not only can reduce the production cost, but also achieve high yield.