化学抑制剂对晚香玉叶宽的影响

Effect of Some Chemicals on Dwarf Tuberose

采用四因素五水平的二次回归正交旋转组合设计 ,通过不同浓度、不同组合的PP3 3 3 、乙烯利、缩节胺和矮壮素处理与植株叶宽建立了关系模型 ,并通过对模型的解析确定了各因素、处理组合与植株矮化的关系。结果表明 ,PP3 3 3 效果最显著 ,它也是影响植株叶宽的最重要、最直接的因素。其它 3种药剂对晚香玉矮化的影响次之。此外 ,PP3 3 3 和乙烯利对晚香玉的矮化有互作效应 ,当两因素为高水平时 ,使叶片变宽 ,增强了对植株的矮化作用。晚香玉矮化的最佳处理组合是PP3 3 3 1 5 7～ 1 74mg/L ,乙烯利 3 0 0～ 3 3 8mg/L ,缩节胺 3 2～ 5 5mg/L ,矮壮素2 2 1～ 2 72mg/L。

Dwarf experiment to spray and soak PP 333 , ethephon, mopiquat.chloride (PIX) and the chlormequat (CCC) was made to study the response of tuberose ( Polianthes tuberosa ).The quadratic second order regression rotation design was for 4 factors and 5 levels and was used to study the relationship between the concentration of chemicals and width of leaves. The results show that soaking the bulbs in solution of PP 333 resulted in the widest leaves. The PP 333 was the most important,effective and direct factor.The effect of spraying leaves by ethephon and soaking the bulbs in solution of chlormequat were better than that of mopiquat.chloride (PIX),and the effect of mopiquat.chloride was not obvious among the four chemicals. The dwarfing effects of PP 333 and ethephon on plant of tuberose showed interaction. When the concentration of two factors was in high level, the leaves were shorter and wider than lower one. The best treated combination of the Polianthes tuberosa L. for dwarf plant were PP 333 at 157～174 mg/L, ethephon at 300～338 mg/L , mopiquat.chloride at 32～55 mg/L and chlormequat at 221～272 mg/L.