多效唑浸种对决明子种子萌发及幼苗生长的影响

Effects of Soaking with Paclobutrazol on Seeds Germination and Seelding Growth of Cassia obtusifolia L.

[目的]研究多效唑(PP333)对决明子(Cassia obtusifolia L.)种子萌发及幼苗生长的影响。[方法]采用不同浓度PP333对决明子种子进行不同时间的浸种处理。[结果]PP333浸种可延缓决明子种子萌发,降低种子发芽率和发芽势,但能够显著提高种子的简易活力指数。PP333浸种还能增加决明子幼苗茎粗,促进植株矮化,促进侧根生长,明显提高幼苗的抗倒伏能力。综合考虑,决明子种子用100mg/L PP333浸种24 h,效果最佳。[结论]该研究可为决明子的高产栽培提供理论依据。

[Objective]The research aimed to study the effects of soaking with paclobutrazol on seeds germination and seedling growth of Cassia obtusifolia L.[Method]The seeds of Cassia obtusifolia L.were soaked by different concentration solution of paclobutrazol in different hours.[Result] The results showed that soaking Cassia obtusifolia L.seeds with paclobutraol delayed the germination of seed,reduced the seed germination percentage and the germination energy,but it could increase the concise seed vigor index.And soaking Cassia obtusifolia L.seeds with paclobutraol increased the stem diameter,dwarfed the plant,induced lateral roots growth and enhanced obviously the lodging resistance of seedling.Among those of the control,the effect of 100 mg/L paclobutraol soaking Cassia obtusifolia L.seeds in 24 h was the best.[Conclusion]The study can provide theoretical basis for high yield cultivation of Cassia obtusifolia L..