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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (33): 84-87.

• 农学 农业基础科学 • 上一篇    下一篇

去除分蘖对甜高粱倒伏的影响

赵威军 张福耀 常玉卉 张阳 邵荣峰 李金梅   

  • 收稿日期:2012-01-05 修回日期:2012-03-15 出版日期:2012-11-25 发布日期:2012-11-25
  • 基金资助:

    高产优质能源甜高粱品种选育;中矮杆粒用高粱及抗倒甜高粱新品种选育;抗倒伏能源甜高粱种质创新

Effects of Destooling on Lodging of Sweet Sorghum

  • Received:2012-01-05 Revised:2012-03-15 Online:2012-11-25 Published:2012-11-25

PDF (PC)

732

摘要：

甜高粱一般具有分蘖的习性，在生产上，作为糖料作物或能源作物栽培时，通常都掰去部分分蘖。倒伏一直是影响中国甜高粱高产稳产的主要因素。为了了解去除分蘖对甜高粱倒伏的影响，采用自然生长和去除分蘖处理，对3个甜高粱品种的与倒伏相关的农艺性状进行了调查研究。研究表明，自然生长(CK)有28.8%~52.0%的分蘖成穗率。与自然生长(CK)相比，去除分蘖使倒伏率、总茎数、株高、重心高度、倒伏系数有所降低，茎粗、抗折力、主茎秆鲜重有所增加，节间长度缩短。株高、主茎秆鲜重、5~7节长度差异没有达到显著水平，而其他性状的差异均达到显著或极显著水平。与倒伏率的相关性方面，株高、茎粗、重心高度、主茎秆鲜重、1~4节长度均达到极显著水平，5~7节倒伏系数达到显著水平。分析认为，去除分蘖降低了田间总茎数，从而降低了植株之间在生长空间上的竞争，使植株高度、重心高度降低，主茎秆鲜重、茎粗增加，下部节间缩短，抗折力增加，抗倒伏性提高。

关键词: 生长, 生长

Abstract:

Sweat sorghum has stooling and sweat sorghum was detillered ordinarily in cultivation. Lodging was an important limiting factor of sweet sorghum production and extension. The effects of detiller on lodging were determined by surveying agronomic traits related lodging of 3 sweet sorghum varieties in normal or detilling. The results showed that stool ratio was 28.8%-52.0% in normal. Lodging ratio, the number of total plants, plant height, gravity center height, knob length and lodging coefficient decreased, and stalk diameter, break-off force and main stem fresh weight increased in detiller. Difference of plant height, main stem fresh weight and lodging coefficient of 5-7 knob were small, and difference of other traits were significant at 0.05 or 0.01 level. Correlation between lodging ratio and plant height, stalk diameter, gravity center height, main stem fresh weight and length of 1-4 knob were significant at 0.01 level, and correlation between lodging ratio and lodging coefficient of 5-7 knob was significant at 0.05 level. The number of total plants, competition among plants plant height and gravity center height were decreased, break-off force was increased, stalk diameter and main stem fresh weight were significantly increased, knob length was shortened by detilling. As a result, lodging resistance was significantly improved and lodging ratio was significantly decreased.