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采用人工模拟水分胁迫方法,对马尾松菌根化和非菌根化容器苗的耐旱性进行研究,结果表明,水分胁迫可显著降低马尾松容器苗土壤中的水分含量,对菌根化苗和非菌根化苗光合色素、硝酸还原酶、丙二醛等生理物质含量、水分含量和根系活力均有显著影响。但在同等程度的水分胁迫条件下,菌根化苗所受的影响明显低于非菌根化苗,其光合能力、降低水分蒸腾能力、减轻细胞膜受损能力、根系活力和苗木含水率均高于非菌根化苗,这表明菌根化苗的耐旱性高于非菌根化苗。因此,为提高马尾松容器苗的耐旱能力和造林成活率,采用印度块菌子囊果匀浆制成的孢子悬浮液对苗木进行接种菌根处理是可行的。
Study on the drought tolerance of mycelial and non-mycorrhizal container seedlings by artificial simulated water stress showed that water stress could significantly reduce the soil moisture content in the container seedling of Masson Pine, And non-mycorrhizal seedlings photosynthetic pigment, nitrate reductase, malondialdehyde and other physiological substance content, moisture content and root activity were significantly affected. However, under the same degree of water stress, the effect of mycorrhizal seedlings was significantly lower than that of non-mycorrhizal seedlings, and photosynthetic capacity, water transpiration, mitigation of cell membrane damage, root activity and seedling water content were all high In non-mycorrhized seedlings, indicating that the mycorrhizal seedlings of drought tolerance than non-mycorrhized seedlings. Therefore, in order to improve drought tolerant capacity and afforestation survival rate of Pinus massoniana seedlings, it is feasible to inoculate mycorrhizal seedlings with the spore suspension made from Indian cymbidium homogenate.