Effects of Different Growth Hormones on Hard wood Cutting Seedling of Nitrariatan tangutorum
The effects of different mass concentrations of naphthylacetic acid(NAA),indolebutyric acid(IBA)and indolea-cetic acid(IAA)on the survival rate and growth status of cuttings in the same year were studied by hardwood cutting ex-periment with 1-2 years old branches of Nitrariatan tangutorum.The results showed as follows:from the survival rate,NAA mass concentration of 200 mg·L-1,IBA mass concentration of 50,100,200 mg·L-1,IAA mass concentration of 50,200 mg·L-1,help to improve the survival of Nitrariatan tangutorum cutting seedlings;from the growth situation,NAA mass concentration of 50,100,200 mg·L-1,IBA mass concentration of 50,200 mg·L-1,IAA mass concentration of 50,100 mg·L-1,promote the vegetative growth of Nitrariatan tangutorum.Considering the interaction among factors,the op-timal treatment for promoting the survival and growth of hardwood cuttings of Nitrariatan tangutorum was NAA mass concentration of 200 mg·L-1.The survival rate was 58.75％,the seedling height was 13.14 cm,and the crown width was 10.08 cm.
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