| The replant disorder is a global problem. It not only restricts the cultivated area of crops, but also reduces its yield and quality. Peach is one of the important fruit trees in our country. Damage caused by replant disorder seriously hinders the development of peach industry. Arbuscular mycorrhizal fungi can improve the capability of nutrient absorption and promote plants growing development as a kind of beneficial microbes in the soil, which play an important role in agricultural production. In this study, peach seedlings and arbuscular mycorrhizal fungi of Glomus were used as experimental materials in order to evaluate the effect of arbuscular mycorrhizal fungi on peach seedlings growth in replant soil, so as to provide basic theories for using arbuscular mycorrhizal fungi to alleviate the replant disorder of peach. The main results in the study are as follows:1. Effects of replant disorder in the peach seedlings growth. The arbuscular mycorrhizal fungi colonization status, growth, biomass, mineral nutrition, rhizosphere soil physical-chemical properties and enzyme activities of peach seedlings in replant soil are significantly lower than those in non-replant soil.2. Effects of arbuscular mycorrhizal fungi colonization status in the peach seedlings. The vesicular colonization rate of peach seedlings in replant soil inoculating with inocula have improvement in varying degrees and significant differences compared with those without inoculating inocula. Among these inocula, inoculation with Glomus geosporum is the best.3. Effects of arbuscular mycorrhizal fungi on growth in the peach seedlings. The plant height, root dry weight, root N and P contents of peach seedlings inoculating with Glomus geosporum in replant soil show promoting effects.4. Effects of arbuscular mycorrhizal fungi on rhizosphere soil physical-chemical properties and enzyme activities in the peach seedlings. Inoculating with inocula can significantly improve the pH value, alkali-hydrolyzable N, available P, organic matter, urease, acid phosphatase and invertase activities of replant soil. Among these inocula, inoculation with Glomus geosporum is the greatest. |
