生化抑制剂组合与施肥模式对黄泥田水稻群体质量的影响
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摘要
【目的】添加生化抑制剂是提高水稻肥料利用率的有效途径之一。本研究旨在结合不同施肥模式揭示其节肥增效的群体优势,寻找适合黄泥田地区水稻高产高效的施用方式。【方法】采用二因素随机区组设计,研究生化抑制剂组合与施肥模式(一次性和分次施肥)互作对黄泥田水稻群体质量的影响。【结果】尿素分次施用处理水稻有效茎蘖数、有效叶面积指数(LAI)、抽穗至成熟期干物质积累量、抽穗期SPAD值和籽粒产量较一次性施用处理分别显著提高0.8%、24.0%、9.3%、1.5%和14.2%。不同施肥模式下,配施生化抑制剂组合N-丁基硫代磷酰三胺/N-丙基硫代磷酰三胺+2-氯-6-(三氯甲基)吡啶(NBPT/NPPT+CP)显著提高水稻有效茎蘖数及茎蘖成穗率,增加抽穗后干物质积累量,增大有效LAI,增加抽穗期SPAD值,提高水稻粒叶比,改善源库关系。相关性分析表明,抽穗至成熟期干物质累积与水稻籽粒产量呈显著正相关。新型脲酶抑制剂N-丙基硫代磷酰三胺(NPPT)单独施用及与2-氯-6-(三氯甲基)吡啶(CP)配施的水稻群体质量与N-丁基硫代磷酰三胺(NBPT)相似。【结论】通过施肥技术和抑制剂配施的集成与优化,可以改善黄泥田水稻群体质量,提高光合产物转化,获得更高产量。
【Objective】Application of biochemical inhibitors is one of the effective ways to improve fertilizer use efficiency of rice. The objective of this study is to reveal rice population heterosis as affected by combined inhibitors and fertilization models, and find a suitable high-yield and efficient application method for rice growing region in yellow clayey soil. 【Method】 The experiment was conducted to study the interaction effect of biochemical inhibitor combinations and fertilization models(one-off and three-time fertilization) on population quality of rice in yellow clayey field using two factor randomized block design. 【Result】Three-split urea fertilization significantly increased number of productive tillers, effective leaf area index(LAI), dry matter accumulation from heading to maturity, SPAD value at heading stage and grain yield of rice by 0.8%, 24.0%, 9.3%, 1.5% and 14.2% compared with those of one-off fertilization treatment, respectively. On the other hand, addition of biochemical inhibitor(NBPT/NPPT+CP) significantly increased number of productive tillers, panicle setting rate, dry matter accumulation after heading, efficient LAI, and SPAD value at heading stage of rice, and also improved the grain to leaf ratio, enhanced the source-sink relationship among different fertilization models. Correlation analysis showed that dry matter accumulation from heading to maturity was significantly positively related with rice grain yield. Application of new urease inhibitor NPPT alone or combined with CP had the same effect on population quality in paddy field with NBPT. 【Conclusion】The integration and optimization of fertilization technique and combined inhibitors application can improve population quality of rice, photosynthetic product transformation and grain yield in yellow clay field.
【Objective】Application of biochemical inhibitors is one of the effective ways to improve fertilizer use efficiency of rice. The objective of this study is to reveal rice population heterosis as affected by combined inhibitors and fertilization models, and find a suitable high-yield and efficient application method for rice growing region in yellow clayey soil. 【Method】 The experiment was conducted to study the interaction effect of biochemical inhibitor combinations and fertilization models(one-off and three-time fertilization) on population quality of rice in yellow clayey field using two factor randomized block design. 【Result】Three-split urea fertilization significantly increased number of productive tillers, effective leaf area index(LAI), dry matter accumulation from heading to maturity, SPAD value at heading stage and grain yield of rice by 0.8%, 24.0%, 9.3%, 1.5% and 14.2% compared with those of one-off fertilization treatment, respectively. On the other hand, addition of biochemical inhibitor(NBPT/NPPT+CP) significantly increased number of productive tillers, panicle setting rate, dry matter accumulation after heading, efficient LAI, and SPAD value at heading stage of rice, and also improved the grain to leaf ratio, enhanced the source-sink relationship among different fertilization models. Correlation analysis showed that dry matter accumulation from heading to maturity was significantly positively related with rice grain yield. Application of new urease inhibitor NPPT alone or combined with CP had the same effect on population quality in paddy field with NBPT. 【Conclusion】The integration and optimization of fertilization technique and combined inhibitors application can improve population quality of rice, photosynthetic product transformation and grain yield in yellow clay field.
引文
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