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以超级杂交稻Q优6号为材料,研究了不同氮、磷、钾肥对水稻干物质积累、养分吸收及产量的影响。结果表明,随着施氮量的增加,水稻产量、有效穗数、每穗粒数逐步提高,而结实率下降,各生育时期叶面积指数(LAI)、干物质积累量均在最高施氮水平下为最大值;随着施磷量的增加,水稻产量、有效穗数和千粒重略微增加,而各生育时期LAI呈先增后减趋势,拔节期干物质积累量逐步提高;随着施钾量的增加,水稻产量、LAI逐步提高,而干物质积累量呈先增后减趋势;随着氮、磷、钾肥施用量的增加,水稻养分总吸收量和每100 kg籽粒养分需求量提高,养分收获指数、养分吸收利用率和养分农学利用率呈下降趋势。
The effect of different nitrogen, phosphorus and potassium fertilizers on dry matter accumulation, nutrient uptake and yield of rice was studied with Q hybrid rice Qyou 6 as material. The results showed that with the increase of nitrogen application rate, the yield of rice, the effective panicles per panicle, the grains per panicle increased gradually while the seed setting rate decreased. The leaf area index (LAI) and dry matter accumulation at each growth stage were at the highest nitrogen level (P <0.01). With the increase of phosphorus application, the yield of rice, the effective panicle number and the 1000-grain weight increased slightly. However, the LAI increased first and then decreased at each growth stage, and the dry matter accumulation at jointing stage increased gradually. , The LAI of rice and rice gradually increased, while the dry matter accumulation increased firstly and then decreased. With the increase of nitrogen, phosphorus and potassium fertilizer application, the total nutrient absorption of rice and the increase of grain nutrient per 100 kg, Harvest index, nutrient uptake utilization and nutrient agronomy utilization rate showed a downward trend.