Effect of arbuscular mycorrhizal fungi on aggregate stability of a clay soil inoculating with two different host plants
文献类型: 外文期刊
第一作者: Xu, Ping
作者: Xu, Ping;Liang, Lin Zhou;Dong, Xiao Ying;Shen, Ren Fang;Xu, Ping
作者机构:
关键词: arbuscular mycorrhizal (AM) fungi;soil structure;normalized mean weight diameter (NMWD);soil organic carbon;tomato;maize
期刊名称:ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE ( 影响因子:1.694; 五年影响因子:1.568 )
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年卷期:
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收录情况: SCI
摘要: Reductions in pore space caused by soil compaction considerably impact soil permeability to air and water by crop roots. The inoculation of arbuscular mycorrhizal (AM) fungi to alleviate this problem has been explored around the world. A pot experiment was conducted to assess the effects of AM fungi inoculation on the growth of two crops, tomato (Solanum lycopersicum L.) and maize (Zea mays L.), and the soil structure in a clay soil (lime concretion black soil). The results showed that AM fungi inoculation increased shoot nitrogen (N) and phosphorus (P) concentrations of maize by 32.4% and 17.0%, respectively. Soil alkali-hydrolyzable N and Olsen-P were 30.1% and 29.9% higher, respectively, in inoculated maize plants than in the corresponding uninoculated treatments for 30 days. No effect of AM fungi on nutrient uptake and soil-available nutrients was found for tomato plants. The NMWD (normalized mean weight diameter, an index to evaluate soil aggregates) values for tomato and maize plants inoculated with AM fungi were 46.2% and 17.7% higher, respectively, than uninoculated plants and the same trends were detected for soil organic carbon (SOC) content. A significant positive relationship was found between SOC and NMWD, indicating that increasing SOC might be one mechanism by which AM fungi improved soil structure. Our results suggested that AM fungi might not always benefit plant growth and nutrient absorption after inoculating for 30 days, but contributed to soil structure improvement even with low colonization.
分类号: S`Q94
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