大穗型小麦41310分蘖动态变化分析

Analysis on Dynamic Change of Tillers of Large Spike Wheat 41310

[目的]为大穗型小麦的利用提供依据。[方法]以小偃22和大穗型小麦新品系41310为材料,调查了其冬、春总茎数的变化情况,分析了大穗型小麦成穗率低的原因。[结果]2品种的分蘖性能相近,41310的总茎数少于小偃22。在3月24日~4月28日的6个时期,41310的消亡总茎数分别较小偃22多49.5万、22.5万、40.5万、36.0万、72.02、65.5万/hm2。4月7日前后,41310和小偃22均有1个分蘖消亡高峰,其分蘖消亡值分别为351.0万和333.0万/hm2 而41310在4月28日前后出现第2个分蘖消亡高峰,分蘖消亡值达337.5万/hm2,使41310的分蘖消亡率达74.6%,成穗率仅为25.4%,穗数减少至423.0万/hm2。[结论]大穗型小麦41310的分蘖消亡速度较小偃22快,且较其多了1个分蘖消亡高峰。

[Objective] The aim was to provide the basis for the utilization of large spike wheat.[Method] With Xiaoyan 22 and large spike wheat variety 41310 as the materials,the changes of their total stem number in winter and spring were investigated and the reason of low spike rate of large spike wheat was analyzed. [Result] The tillering ability of 2 varieties was similar, the extinct total stem number of 41310 was more than that of Xiaoyan 22. In 6 in- vestigatiom from March 24 to April 28, the extinct total stem number of 41310 were 49.5 × 10^4, 22.5 × 10^4, 40.5 x× 10^4, 36.0 × 10^4, 72.0 × 10^4,265. 5 × 10^4/hm2 higher than those of Xiaoyan 22 resp. The tillers of 41310 and Xiaoyan 22 all had an extinct peak at pre-and post April 7, and their extinct tillers were 3.51 × 10^6 and 3.33 × 10^6/hm2 resp. The tillers of 41310 had the second extinct peak at pre-and post April 28 and its extinct tillers was 3.375 × 10^6/hm2, and its extinct tillers rate wad 74.6%, and its spike rate was only 25.4%, the number of its spike decreased to 4.23× 10^6/hm2. [Conclusion]The extinct speed of tillers of large spike wheat 41310 was faster than that of Xiaoyan 22, and its extinct peak of tillers was 1 more than that of Xiaoyan22.