摘要
3种植物生长延缓剂 (B9,PP333和CCC)对香根草的株高生长、分蘖速度和抽穗开花等方面都产生影响 ,但不同的药剂种类和浓度所产生的影响相差较远。在本实验浓度下 ,低浓度的延缓剂不仅不抑制香根草的株高生长 ,而且还有显著的促进作用 ,高浓度的B9虽有抑制作用 ,但这种抑制也只是短期的。延缓剂对分蘖的形成具有促进作用 ,其中以 4 g/L的B9对分蘖的促进效果最显著 ,PP333明显地提早和促进香根草的抽穗扬花 ;而CCC的总体作用效应最弱。总之 ,3种延缓剂对香根草的作用效果比对一般作物的作用效果差 ,这可能是香根草的抗性较强 。
Three kinds of plant growth retardants, B9, PP333, and CCC, all had influences on the growth, development, tiller formation and inflorescence of vetiver grass (Vetiveria zizanioides); but different kinds and concentraitons of retardants produced distinctl different effects in this respects. The 3 medicaments all promoted tiller formation, up to 11%～53% or so in a growing season. 8 g/L B9 also retarded the growth of vetiver by 6%, delayed flowering for nearly 10 days, and reduced the number of inflorescence significantly by 80% at the same time, when compared to the control; but 4 g/L B9 hardly retarded the growth and flowering except that it, too, reduced the number of inflorescence, up to 50%. However, PP333 with concentrations of 0.6 and 1.2 g/L . and CCC with 1.0 and 2.5 mL/L all promoted the growth of vetiver, up to 5%～22%; and furthermore, the treatment of 1.2 g/L PP333 also enhanced inflorescence by 31%, and 0.6 g/L PP333 promoted flowering 4 days earlier than CK did. The results above mentioned indicate that B9, as the retardant of vetiver, had better effects than PP333 and CCC; furthermore impacts of the plant growth retardants on vetiver were obviously different from other crops, which is most likely that vetiver had strong resistance and accordingly the retardants wit conventional concentrations do not produce clear influence on it.
出处
《草原与草坪》
2000年第3期29-33,共5页
Grassland and Turf
基金
国家自然科学基金资助项目! (批准号 :3 9870 15 5 )
关键词
香根草
植物生长延缓剂
矮化
分蘖
Vetiveria zizanioides (L.)
Nash
plant growth retardant
dwarfism
tiller formation
