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拟定了快速而无需破坏样本的“株型结构分析法”及其计算机程序。调查了小麦冠层结构与消光系数(K值)分布在21个基因型间和同一基因型的不同处理间的差异。对该方法所作的验证表明:采用该法调查结果和分层切片法与Ross法的结果基本一致。此法是可靠的。冠层结构与K值垂直分布在基因型间差异极显著;同一基因型不同密度之间仅达显著程度。K值是比较稳定的遗传性状,广义遗传力为76.9％。总K值对籽粒产量影响不大。由于长江下游地区辐射条件较差,高产群体表现出冠层重心较高,K值分布呈上层大、中层小的特点。说明该地区选育的品种上部叶水平角宜小(倾斜至水平),中部叶宜直立。讨论中提出了以株型结构分析法对K值分布作选样和培育高产品种的可能性。
Formulated a “rapid and without destroying the sample” plant structure analysis "and its computer program. The differences in the distribution of canopy structure and extinction coefficient (K value) between 21 genotypes and the same genotype were investigated. The validation of this method shows that the results of this method and the stratified slicing method are basically consistent with the results of Ross method. This method is reliable. The vertical distribution of canopy structure and K value showed extremely significant differences among genotypes; only significant differences were found between different genotypes of the same genotype. K value is relatively stable genetic traits, the generalized heritability of 76.9%. The total K value had little effect on grain yield. Due to the poor radiation conditions in the lower reaches of the Yangtze River, the high-yielding population showed a higher center of gravity of the canopy, and the distribution of K values showed the characteristics of large upper layer and small middle layer. It shows that the upper leaves should be small (tilted to the horizontal), and the middle leaves should stand upright. In the discussion, the possibility of selecting samples for K value distribution and cultivating high-yielding varieties with plant structure analysis method was proposed.