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林草资源研究 ›› 2024›› Issue (1): 143-150.doi: 10.13466/j.cnki.lczyyj.2024.01.018

• 技术应用 • 上一篇    

不同郁闭度橡胶林对套种土沉香幼树生长特性的影响

张方兰1(), 吴少忠1(), 徐建辉1, 沙林华1, 黎肇家1, 方发之1,2   

  1. 1.海南省林业科学研究院(海南省红树林研究院),海口 571100
    2.海南省热带林业资源监测与应用重点实验室,海口 571100
  • 收稿日期:2023-11-22 修回日期:2024-02-18 出版日期:2024-02-28 发布日期:2024-03-22
  • 通讯作者: 吴少忠,高级工程师,主要从事森林培育工作。Email:wushzh888@163.com
  • 作者简介:张方兰,工程师,主要从事林业规划研究。Email:2570148321@qq.com
  • 基金资助:
    海南省属科研院所技术创新专项“橡胶与白木香混交种植技术研究”(KYYS-2021-26)

Effects of Different Crown Density of Hevea brasiliensis Plantations on the Growth Characteristics of Aquilaria sinensis Saplings under Interplanting

ZHANG Fanglan1(), WU Shaozhong1(), XU Jianhui1, SHA Linhua1, LI Zhaojia1, FANG Fazhi1,2   

  1. 1. Hainan Academy of Forestry(Hainan Academy of Mangrove),Haikou 571100,China
    2. Hainan Key Laboratory of Monitoring and Application of Tropical Forestry Resources,Haikou 571100,China
  • Received:2023-11-22 Revised:2024-02-18 Online:2024-02-28 Published:2024-03-22

摘要:

为探究并筛选出较适宜土沉香套种的橡胶林分,在3种不同郁闭度(0~0.1,0.2~0.3,0.7~0.8)橡胶林进行土沉香幼树套种种植。测定土沉香幼树在试验地林下形态指标、总生物量干质量、生理生化指标,采用主成分分析土沉香幼树各指标对不同郁闭度橡胶林的响应信息,通过比较筛选出适宜土沉香幼树生长的橡胶林。结果显示:1)郁闭度为0.2~0.3的橡胶林,土沉香幼树形态指标增长量最高,总生物量干质量最大,叶绿素总量、可溶性蛋白含量、过氧化氢酶活性显著高于其他2种郁闭度的橡胶林;丙二醛含量较低,可溶性糖含量、超氧化物歧化酶活性与另2种郁闭度的橡胶林无显著差异。2)郁闭度为0.7~0.8的橡胶林,土沉香幼树生长最差,总生物量干质量最低。3)郁闭度为0~0.1的橡胶林,土沉香幼树生长适中。4)主成分分析表明,套种于橡胶林郁闭度为0.2~0.3的土沉香幼树各指标综合得分最高,其3 a生橡胶林较适宜土沉香幼树混交套种种植。

关键词: 不同郁闭度, 橡胶林, 土沉香, 生长状况, 综合评估

Abstract:

In order to explore and screen out Hevea brasiliensis(Willd.ex A.Juss.)Muell.Arg stand suitable for intercropping of Aquilaria sinensis(Lour.)Spreng.Aquilaria sinensis saplings were interplanted in three different crown densities(0~0.1,0.2~0.3,0.7~0.8,respectively)Hevea brasiliensis plantations.The morphological indexes,total biomass dry weight,physiological and biochemical indexes of Aquilaria sinensis saplings in the experimental plantations were determined.Principal component analysis was used to analyze the response information of each index of Aquilaria sinensis saplings to Hevea brasiliensis forests with different crown densities.The Hevea brasiliensis forests suitable for the growth of Aquilaria sinensis saplings were selected by comparison.Results show :1)The Hevea brasiliensis plantation with a crown density of 0.2~0.3 had the highest growth rate of morphological indexes,the highest dry weight of total biomass,the total chlorophyll content,soluble protein content and catalase activity of Aquilaria sinensis saplings,which were significantly higher than those of the other two Hevea brasiliensis plantations.The malondialdehyde content was low,and the soluble sugar content and superoxide dismutase activity were not significantly different from those of the other two Hevea brasiliensis plantations.2)In Hevea brasiliensis plantations with a crown density of 0.7~0.8,the growth of Aquilaria sinensis saplings was the worst,and the total biomass dry weight was the lowest.3 )The growth of Aquilaria sinensis saplings was moderate in Hevea brasiliensis forest with a crown density of 0~0.1.4)Principal component analysis showed that the comprehensive score of each index of Aquilaria sinensis saplings interplanted in Hevea brasiliensis plantations with a crown density of 0.2~0.3 was the highest.Therefore,the 3-year-old Hevea brasiliensis plantationswith a crown density of 0.2~0.3 was more suitable for mixed intercropping of Aquilaria sinensis saplings.

Key words: different crown densities, Hevea brasiliensis planation, Aquilaria sinensis, growth status, multifactorial evaluation

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