多效唑对紫穗槐抗旱节水的形态作用研究

The effects study of paclobutrazol on amorpha fruiticosa drought resistance and water saving morphology

为了研究多效唑对紫穗槐的抗旱节水的形态效应,开展了6水平不同浓度的多效唑对紫穗槐的盆栽试验,对紫穗槐的形态指标进行了测量.结果表明:多效唑有效抑制了紫穗槐的株高、叶面积、盖度、冠幅、基径,增加了紫穗槐的株数和叶色.适当浓度的多效唑能增大紫穗槐的盖度、冠幅、基径,增加水土保持效果和抗倒伏性.综合考虑,D4多效唑浓度下不仅可以有效降低紫穗槐株高和叶面积,减少养分水分需求和水分蒸发,增强抗旱性,还可以增大盖度、冠幅、基径,加深叶色,增强水土保持效果和保持良好的景观效果,故这个浓度最佳.

In order to study the drought resistance and water saving morphology effects of pacolbutrazol on A. fruiticosa, the pot experiment was carried out of six levels paclobutrazol applied on A. Fruitico- sa, the morphology indexes were measured. The results showed that paclobutrazol inhibited effectively the height, leaf area, coverage, crown width, base diameter, increased the numbers and leaf colour. The proper concentration paclobutrazol could increase the coverage, crown width, base diameter, lift water and soil conservation effect and lodging resistance. Total consideration,D4 not only inhibited the height and leaf area of A. fruiticosa, decreased nutrient and water needs and water evaporation, increased drought resistance,increased coverage, crown width, base diameter,leaf colour to improve water and soil conservation and landscape effect, so D4 was the optimum concentration.