周驰宇, 张玉薇, 蔡年辉, 等. 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(自然科学), 2024, 44(5): 1–7. DOI: 10.11929/j.swfu.202310069
引用本文: 周驰宇, 张玉薇, 蔡年辉, 等. 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(自然科学), 2024, 44(5): 1–7. DOI: 10.11929/j.swfu.202310069
ZHOU Chiyu, ZHANG Yuwei, CAI Nianhui, XU Yulan, HE Bin. Response of Sprouting and Tillering Growth of Pinus yunnanensis Seedlings to Exogenous IAA and ZT Application[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202310069
Citation: ZHOU Chiyu, ZHANG Yuwei, CAI Nianhui, XU Yulan, HE Bin. Response of Sprouting and Tillering Growth of Pinus yunnanensis Seedlings to Exogenous IAA and ZT Application[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202310069

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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: 为探讨不同的外源激素对云南松苗木平茬萌蘖生长的影响,以2年生云南松为研究对象,喷施不同浓度的外源激素IAA和ZT。结果表明:适宜截干后云南松苗高生长的最佳激素配比为IAA 300 mg/L、ZT 0 mg/L,且在一定范围内IAA对苗高的生长有促进作用,苗高累计生长量随时间的变化呈现慢−快−慢的生长趋势,苗高生长的速生点和速生期伴随着IAA浓度的增加而延后。适宜截干后云南松苗木地径生长的最佳激素配比为IAA 0 mg/L、ZT 100 mg/L,且在一定范围内ZT对云南松苗木地径的生长有着促进作用,地径累计生长量随时间的变化呈现出慢−快−慢的生长趋势。喷施IAA 300 mg/L、ZT 100 mg/L激素时,平茬后云南松苗木单株萌条数量最多,但均无显著差异。在IAA与ZT组合喷施作用下云南松苗木生长受到一定的影响,ZT对云南松苗木地径的生长有着促进作用,并且ZT更利于苗木萌条数量的增加,喷施ZT在云南松萌条生长发育中所发挥的作用优于喷施IAA,即找到合适的激素及浓度可使云南松苗木萌蘖能力发挥最大。

     

    Abstract: To investigate the effects of different exogenous hormones on the sprout growth of Pinus yunnanensis seedlings after stump cutting, two-year-old Yunnan pines were selected as the study subjects. These P. yunnanensis 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 seedlings, 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.

     

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