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    徐小冲, 王新杰, 卢妮妮, 赵芸, 林晨, 董博源, 李佳妮. 不同林龄杉木人工林根际土添加对其幼苗菌根侵染及生长的影响[J]. 北京林业大学学报, 2020, 42(12): 74-82. DOI: 10.12171/j.1000-1522.20200044
    引用本文: 徐小冲, 王新杰, 卢妮妮, 赵芸, 林晨, 董博源, 李佳妮. 不同林龄杉木人工林根际土添加对其幼苗菌根侵染及生长的影响[J]. 北京林业大学学报, 2020, 42(12): 74-82. DOI: 10.12171/j.1000-1522.20200044
    Xu Xiaochong, Wang Xinjie, Lu Nini, Zhao Yun, Lin Chen, Dong Boyuan, Li Jiani. Effects of rhizosphere soil addition of different aged Chinese fir plantation on the mycorrhizal colonization and growth of its seedlings[J]. Journal of Beijing Forestry University, 2020, 42(12): 74-82. DOI: 10.12171/j.1000-1522.20200044
    Citation: Xu Xiaochong, Wang Xinjie, Lu Nini, Zhao Yun, Lin Chen, Dong Boyuan, Li Jiani. Effects of rhizosphere soil addition of different aged Chinese fir plantation on the mycorrhizal colonization and growth of its seedlings[J]. Journal of Beijing Forestry University, 2020, 42(12): 74-82. DOI: 10.12171/j.1000-1522.20200044

    不同林龄杉木人工林根际土添加对其幼苗菌根侵染及生长的影响

    Effects of rhizosphere soil addition of different aged Chinese fir plantation on the mycorrhizal colonization and growth of its seedlings

    • 摘要:
        目的  研究不同林龄杉木人工林根际土添加对杉木无菌幼苗生长的影响,为杉木合理的菌根化育苗提供理论基础。
        方法  选取苗龄4个月的杉木无菌幼苗为材料,移栽至无菌基质土中,在幼苗根系附近分别添加(150 ± 2) g的杉木幼龄林根际土(RS1)、中龄林根际土(RS2)、近熟林根际土(RS3)、成熟林根际土 (RS4)、过熟林根际土(RS5),同时设置对照(CK)处理。添加前测定根际土养分含量、酸碱度、丛枝菌根真菌(AMF)孢子密度,并于移栽后1年测定杉木幼苗根系AMF侵染率、基质土养分含量、酸碱度,测量杉木幼苗形态指标、计算生物量。
        结果  表明:不同林龄杉木人工林根际土的养分含量、酸碱度、AMF孢子密度有差异,其添加对杉木幼苗根系侵染率提高有显著促进作用,幼苗根系AMF侵染率与所添加林分根际土中AMF孢子密度有极显著正相关关系,侵染率呈现RS5 > RS4 > RS3 > RS1 > RS2 > CK的规律。杉木林分根际土的添加对杉木幼苗地径、苗高、根长、冠幅、基生枝条数、生物量累积等也有促进作用,添加过熟林根际土(RS5)的处理在促进杉木幼苗生长方面优于其他4种根际土。
        结论  杉木林分根际土可以作为菌剂添加进行杉木幼苗的菌根化育苗,增加根系菌根侵染率,促进幼苗的高质量生长,这对杉木育苗及菌根真菌在林业上的应用具有重要实践意义。

       

      Abstract:
        Objective  This paper aims to study the effects of rhizosphere soil addition of different aged Chinese fir plantation on the growth of aseptic seedlings of it, and to provide a theoretical basis for the mycorrhizal seedlings of Chinese fir.
        Method  The aseptic seedlings of 4 months old Chinese fir were transplanted into aseptic substrate soil, and (150 ± 2) g of rhizosphere soil (RS1), middle-aged rhizosphere soil (RS2), near mature rhizosphere soil (RS3), mature rhizosphere soil (RS4) and over mature rhizosphere soil (RS5) were added near the roots of seedlings. The nutrient content, pH and spore density of arbuscular mycorrhizal fungi (AMF) in rhizosphere soil were measured before adding. The AMF colonization rate, nutrient content and pH of substrate soil, morphological index and biomass of Chinese fir seedlings were measured one year after transplanting.
        Result  There were differences in nutrient content, pH and AMF spore density in rhizosphere soil of Chinese fir plantation of different ages. The addition of AMF significantly promoted the colonization rate of Chinese fir seedlings. There was a significant positive correlation between AMF infection rate and AMF spore density in rhizosphere soil of the Chinese fir stand. The colonization rate showed the rule of RS5 > RS4 > RS3 > RS1 > RS2 > CK. The addition of rhizosphere soil also promoted the growth of seedlings, such as ground diameter, seedling height, root length, crown width, number of basal branches and biomass accumulation. The addition of RS5 was better than the other four types of rhizosphere soil.
        Conclusion  The rhizosphere soil of Chinese fir stand can be used as a fungicide adding to the seedling of Chinese fir, increasing the colonization rate of mycorrhizal roots, and promoting the high-quality growth of seedlings, which has a great practical value to the seedlings of Chinese fir and the application of mycorrhizal fungi in forestry.

       

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