多效唑对几种果园杂草种子萌发的影响
Effects of Paclobutrazol on Germination of Weed Seeds in Orchard
在生长箱中25±1℃恒温、光暗周期12/12小时的条件下，研究了多效唑对裂叶牵牛、圆叶牵牛、苦苣菜、藜、绿苋等5种双子叶果园有害杂草种子萌发的影响。结果表明：在一定浓度范围内，随着多效唑浓度的增加上述5种杂草种子的发芽率和发芽势都显著或极显著降低，其胚根、胚芽的伸长也受到了显著抑制。种子发芽及胚根、胚芽伸长对多效唑反应的敏感程度因杂草种类而异：绿苋最为敏感，5mg/L即极显著地抑制了胚根胚芽的伸长，10mg/L即极显著地降低了其发芽率和发芽势，15mg/L即使其种子发芽率、发芽势降至50%以下， 35mg/L完全抑制了其种子萌发；苦苣菜种子对多效唑反应亦十分敏感，25mg/L处理就极显著地降低了其种子发芽率，100mg/L处理使其种子发芽率降低至50%以下；藜、圆叶牵牛和裂叶牵牛种子对多效唑的反应敏感性差，极显著降低其发芽率的最低多效唑浓度分别为200mg/L、 150mg/L和200mg/L，藜种子发芽率降低至50%以下的多效唑浓度在400mg/L以上，而圆叶牵牛、裂叶牵牛种子发芽率随多效唑浓度增高而缓慢降低至90%左右后又有所回升；5种双子叶杂草种子发芽对多效唑的敏感程度由强至弱的顺序为：绿苋＞苦苣菜＞藜＞圆叶牵牛＞裂叶牵牛。
nder the condition of constant temperature at 25℃ and 12 hour light , the effect of paclobutrazol on germination of harmful weed seeds in orchard, including (Pharbitis purpurea，Pharbitis nil ，Chenopodium serotinum, Amaranthus albus, Sonchus brachyotus), were studied in this article. The result showed that in a certain concentration range, the germination percentage and germination energy markedly or greatly markedly declined with the concentration of paclobutrazol increasing, and the growth of radical and plumule was inhibited at the same time. The sensitivities of these weed seeds varied with different kinds. And the Amaranthus albus was the most sensitive. When the concentration of paclobutrazol was 5mg/L, the growth of its radical and plumule was markedly inhibited, and the germination percentage and germination energy of its seeds were decreased markedly when the concentration of paclobutrazol reach 10mg/L , and they declined under 50 percent when the concentration of paclobutraz
贾克功、马丰蕾
植物保护农艺学植物学
多效唑杂草种子发芽率发芽势胚根胚芽
paclobutrazolweed seedsgermination percentagegermination energyradicalplumule
贾克功,马丰蕾.多效唑对几种果园杂草种子萌发的影响[EB/OL].(2005-10-31)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/200510-321.点此复制
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