半冬性小麦品种茎秆农艺性状的研究

研究了２４ 个半冬性小麦品种茎秆农艺性状及部分产量性状，结果表明：茎粗，第１ 、２ 节间长及穗长与产量性状相关性较大，株高与第２ 、３ 、４ 节间长均呈极显著的正相关，其中第３ 节间长对株高的直接贡献最大，因而降低第３ 节间长有利于株高的降低。合理的茎秆性状要求：植株较高，茎秆粗壮，第１ 、２ 节间较长，第３ 、４ 、５ 节间较短。

Study on Stem Agricultural Characters of Semi Winter Wheat Plant

The study on the characters of stem and yield of 24 semi winter wheat cultivars(strains) had been done. The results indicated that the correlations between stem diameter, length of first and second internode, panicle length and yield characters were more apparent. The corrections between the plant height and length of second, third and fourth internode were significant (0.01), and the most direct contribution to height was length of third internode, so decreasing plant height depended on shortening the length of third internode. The ideal stem characters required for high yield was higher plant, stronger stem, longer internodes at top part and shorter internodea at middle bottom part of plant.