Growth and microelement absorption for Pinus massoniana seedlings with ectomycorrhizae and water stress
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摘要: 在温室采用盆栽方法，研究在4种干旱条件下，5种菌根真菌对马尾松Pinus massoniana幼苗生长和微量元素吸收的影响。结果表明：①在干旱胁迫下，外生菌根真菌能显著提高苗木苗高、地径、生物量和抗旱能力，且不同菌种、不同干旱程度处理间的差异极显著。中度干旱胁迫时接种鸡油菌Cantharellus cibarius对苗高、地径促生效果最好，分别比对照增加27.8%和52.9%；接种褐环乳牛肝菌Suillus luteus Sp1对苗木生物量促进效果最明显，较对照增加230%。②在干旱胁迫下，外生菌根对苗木微量元素的吸收有一定影响。在中度干旱胁迫时，接种褐环乳牛肝菌Sp1的苗木中铁、锰、铜和锌质量分数最高，比对照分别增加135%，33%，155%和96%。在中度胁迫下，接种褐环乳牛肝菌Sp1的苗木中铁、锰、铜和锌质量分数与正常水分条件下该菌根化苗木相比增幅最大，分别为47.9%，46.1%，130.7%和49.0%。综上所述，中度胁迫时，接种褐环乳牛肝菌Sp1能增加苗木干物质的积累，促进苗木对微量元素的吸收，进而促进苗木生长，提高苗木抗旱性。图1表3参15Abstract: According to the principle of adjust measures to local conditions to choice the fine strains for afforestation，at the same time make mycorrhizal biological technology applied to production practice preferably. The effect of ectomycorrhizae on growth and microelement absorption of potted Pinus massoniana seedlings was studied in a greenhouse，by inoculating Pisolithus tinctorius，Cenococcum geophilum，Cantharellus cibarius，Suillus luteus respectively and control group，under the conditions of four levels water stress that make the relative water content of soil，to moisture conditions，light water stress，moderate water stress and severe water stress. Results showed that ectomycorrhizae significantly improved growth （P=0.01），ground diameter （P=0.01），and biomass （P=0.01） of P. massoniana seedlings with drought stress. And the double factor analysis of variance showed that highly significant differences （P=0.01） were also noted between the various strains，moisture，and the interaction of strains and water. The seedling by inoculating Cenococcum geophilum had the best growth increases for height （27.8%） and diameter （52.9%） compared to control group under the conditions of moderate water stress. And the seedling by inoculating Suillus luteus Sp1 had the best increased for biomass （230%） compared to control group. Ectomycorrhizae fungi could effect the seedling to absorption of microelement under the conditions of water stress. The seedling by inoculating Suillus luteus Sp1 ，had the high content of Fe，Mn，Cu，and Zn，and compared to control group，seedling microelement absorption increased for Fe （135%），Mn （33%），Cu （155%），and Zn （96%） under the conditions of moderate water stress. In addition，the seedling by inoculating Suillus luteus Sp1 ，had the best increased for Fe （47.9%），Mn （46.1%），Cu （130.7%），and Zn （49.0%） compared to moisture conditions，under the moderate water stress. Thus，inoculation with Suillus luteus Sp1 undergoing moderate stress could increase biomass, improve seedling absorption of microelements, promote seedling growth, and enhance seedling drought resistance.［Ch，1 fig. 3 tab. 15 ref.］
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Key words:
- silviculture /
- Pinus massoniana /
- ectomycorrhizae /
- water stress /
- growth /
- microelement
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2012.06.004
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