小麦高产群体质量研究的技术原理主要有3个方面：一是提出开花后干物质积累量是群体质量的本质特征；二是扩大花后干物质积累量的关键是在适宜叶面积指数（LAI）基础上提高粒叶比、总结实粒数、有效和高效叶面积比率等形态生理指标；三是提高茎孽成穗率、达到50％，是全面优化 The technical principle of wheat high-yield population quality research mainly has three aspects: First, it is proposed that the dry matter accumulation after flowering is the essential characteristic of the population quality; second, the key to expanding the post-flowering dry matter accumulation is the appropriate leaf area index (LAI) Based on the increase of grain-leaf ratio, the number of grains summarized, the effective and efficient leaf area ratio and other morphological and physiological indicators; the third is to improve the rate of stem into the ear, reaching 50%, is fully optimized