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以粳稻 95 16为材料 ,对上海地区直播单季水稻物质生产特点进行了分析研究。结果表明 :(1)生物产量与经济产量相关密切 ,抽穗前干物质生产量与谷物产量呈二次曲线相关 ,抽穗后干物质生产量与谷物产量呈极显著线性正相关。 (2 )抽穗期干物重与单位面积穗数呈显著正相关 ;抽穗前各阶段对干物质生产速率的影响 :播种至够苗和够苗至拔节以平均LAI的作用较大 ,拔节至抽穗期以NAR的作用较大。 (3)抽穗后干物质生产量与拔节至抽穗和抽穗至成熟吸N量显著相关 ,与抽穗后单茎干物质生产量显著相关 ,与单位面积颖花量显著相关 ,与抽穗后NAR显著相关 ;抽穗后NAR与抽穗期单茎叶面积、抽穗后叶面积衰退、粒叶比、抽穗期叶片含N率、成穗率相关密切
Taking japonica rice 95 16 as material, the material characteristics of direct seeding single season rice in Shanghai were analyzed. The results showed that: (1) There was a close correlation between biomass yield and economic yield. The yield of dry matter before heading was quadratic curve with grain yield. There was a significant linear positive correlation between dry matter yield and grain yield after heading. (2) There was a significant positive correlation between dry matter weight and panicles per unit area at heading stage. The effect of each stage before heading on dry matter production rate: the effect of average LAI on sowing enough seedling and seedling to jointing was larger, The role of NAR larger. (3) There was a significant correlation between dry matter production after heading and the N content at jointing stage to heading stage and heading stage to maturity stage, significantly correlated with single stem dry matter production after heading stage, significant correlation with spikelets per unit area and significant correlation with NAR after heading ; After heading NAR and heading stage single stem leaf area, leaf area decay after heading, grain-leaf ratio, N-containing heading rate at heading, spike rate close