38个小麦品种株高构成指数与节间粗度分析

[目的]探讨小麦(Triticum aestivum)植株株高构成指数与节间粗度组成特征。[方法]以黄淮麦区38个小麦栽培品种为试验材料,对其进行定量分析。[结果]38个小麦品种穗长/株高比值平均为0.118 6,自倒1节开始,株高构成指数的变幅分别为0.524 2~0.666 9、0.568 2~0.664 7、0.502 7~0.638 7、0.494 8~0.739 6,平均值分别为0.574 4、0.620 0、0.570 0、0.406 1,其中只有倒2节间的I值大于0.618,其余都小于0.618;节间粗度为穗下节0.45 cm,倒2节0.54 cm,倒3节0.53 cm,倒4节0.52 cm,倒5节0.46 cm,倒2节倒3节倒4节倒5节倒1节。[结论]该研究可为构建小麦相适应的株型结构,实现小麦超高产栽培提供指导。

Analysis of Plant Height Components Index and Internode Roughness of 38 Kinds of Wheat(Triticum aestivum L.) Cultivars

Abstract [ Objective ] The ~im was to discuss the compositions characters of plant height components index and internode roughness of wheat cuhivars. [ Method] 38 kinds of wheat cultivars from Huanghuai wheat area were analyzed quantitatively. [ Result] The average ratio of panicle length to plant height of 38 kinds of wheat cuhivars was 0. 1186, the change range of the height components index at the lth, the 2th, the 3th, and the 4th nodes from top was O. 524 2 - 0. 666 9, 0. 568 2 - 0. 664 7, 0. 502 7 - 0. 638 7,0. 494 8 - 0. 739 6, resp. , and their average was O. 574 4, O. 620 0,0. 570 0,0.406 1, resp. , thereinto, only the I value of the 2th nodes from top was more than O. 618, while the others were all less than 0.618 ; the internode roughness of the 1 th nodes from top was 0.45 cm, and that of the 2th, the 3th, the 4th, and 5th was O. 54, 0.53, 0.52, 0.46 cm, resp. , namely the 2th nodes from top 〉 the 3th nodes from top 〉 the 4th nodes from top 〉 the 5th nodes from top 〉 the lth nodes from top. [ Conclusion] The study provides a guidance for constructing the corresponding plant ty~ of wheat to realize its super high yield cultivation.