香根草定植前几种催根法的比较研究

为了解催根对香根草成活率及生长的影响,采用浸根、浆根、水培、沙植和稻壳培植五种催根方法,分别给予除氯自来水和25 mg/L IAA两种条件,在定植前对香根草进行处理,与对照组进行对比试验.结果表明:各种催根方法都能有效提高成活率和草苗的日均生长高度;IAA的效果最佳;IAA能促进新根的产生、生长,以浆根 IAA最明显;从定植后草苗的长势看,IAA的效果更明显,以浆根 IAA最好.综上所述,定植前对草苗进行催根处理是必要的,以25 mg/LIAA浆根效果最好,而且简便易行.

A study of several root-promoted methods of preplanting Vetiveria zizanioides

To reveal what is the effect of root-promoted methods on the survival rate and growth of Vetiveria zizanioides L., five root-promoted methods, namely: immersing, mudding, water-cultured, sand-cultured and rice shell-cultured, were taken to treat Vetiveria zizanioides before planted. Two conditions of water without cl element and 25 mg/L IAA were given respectively. The seedlings of the preplanted Vetiveria zizanioides were treated, and the comparative experiments with those untreated were conducted. It is showed that: each method can improve the survival rate and everyday growth height of the seedlings effectively, especially with IAA; IAA can improve the arising and growth of the new roots, and the effect of the method of mudding roots with IAA is finer; Observing the growth condition of the planted seedlings, the effect of IAA is even more evident, and mudding roots with IAA is the most effective. To sum up, it is necessary to promote roots of the seedlings before planting them, and the method of mudding roots with IAA is the most effective and convenient.