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采用目前生产上应用的20个籼型杂交稻品种,在高密低肥、中密中肥和低密高肥3种密肥条件下,研究了齐穗期LAI(叶面积指数)与产量的相关性,进而分析了不同LAI条件下产量差异、产量构成、物质积累与运转特点;同时分析了关键栽培因子与产量的相关性。最后对产量突破的途径和关键技术进行了讨论,可为目前水稻高产创建提供理论与技术参考。
Using 20 indica hybrid rice varieties currently used in production, the relationship between LAI (heading area index) and yield at heading stage was studied under the conditions of three kinds of high-density, low-density, medium-density and low- Then, the characteristics of yield, composition of production and material accumulation and operation under different LAI conditions were analyzed. At the same time, the correlation between key cultivation factors and yield was analyzed. At last, the way of breakthrough of production and key technologies are discussed, which can provide theoretical and technical reference for the current high yield of rice.