西南林业大学学报2024，Vol.44Issue(9)：18-24,7.DOI:10.11929/j.swfu.202310069
外源IAA与ZT喷施对截干后云南松苗木生长的影响
Response of Sprouting and Tillering Growth of Pinus yunnanensis Seedlings to Exogenous IAA and ZT Application
摘要
Abstract
To investigate the effects of different exogenous hormones on the sprout growth of Pinus yunnan-ensis seedlings after stump cutting,two-year-old P.yunnanensis were selected as the study subjects.These P.yun-nanensis were sprayed with different concentrations of the exogenous hormones indole-3-acetic acid(IAA)and zeatin(ZT).The results showed that the optimal hormone combination for the height growth of P.yunnanensis seedlings after cutting was IAA 300 mg/L and ZT 0 mg/L.Within a certain range,IAA promoted the height growth of the seedlings,with the cumulative growth of seedling height over time showing a slow-fast-slow growth trend.The rapid growth point and period of seedling height were delayed with increasing concentrations of IAA.The optimal hormone combination for the diameter growth at the ground level of P.yunnanensis seedlings after cutting was IAA 0 mg/L and ZT 100 mg/L.Within a certain range,ZT promoted the diameter growth of the seed-lings,with the cumulative growth of diameter at the ground level also showing a slow-fast-slow trend.When sprayed with IAA 300 mg/L and ZT 100 mg/L,the number of sprouts per P.yunnanensis seedling was the highest after stump cutting,although there were no significant differences.The combination of IAA and ZT influenced the growth of P.yunnanensis seedlings,with ZT specifically promoting the diameter growth and favoring an increase in the number of sprouts.The role of ZT in the growth and development of P.yunnanensis sprouts was superior to that of IAA,indicating that finding the appropriate hormone and concentration can maximize the sprouting ability of P.yunnanensis seedlings.关键词
云南松/外源激素/截干/生长/萌条Key words
Pinus yunnanensis/exogenous hormone/stumping/growth/sprout分类
农业科技引用本文复制引用
周驰宇,张玉薇,蔡年辉,许玉兰,贺斌..外源IAA与ZT喷施对截干后云南松苗木生长的影响[J].西南林业大学学报,2024,44(9):18-24,7.基金项目
云南省农业联合专项面上项目(202301BD070001-035)资助 （202301BD070001-035）
云南省农业联合专项重点项目(202301BD070001-152)资助 （202301BD070001-152）
国家自然科学基金项目(32360381)资助 （32360381）
云南省万人计划青年拔尖人才项目(YNWR-QNBJ-2019-075)资助 （YNWR-QNBJ-2019-075）
云南省研究生导师团队建设项目(2022-97)资助. （2022-97）
