PDF(Pubmed)
Abstract：
Organic production systems are increasingly gaining market share; however, there are still few studies on their influence on the activity of soil microorganisms in sugarcane. Arbuscular mycorrhizal fungi are extremely sensitive to environmental changes, and their activity can be used as a parameter of comparison and quality between organic and conventional systems. The objective of this work was to evaluate mycorrhizal activity in different varieties of sugarcane under two production systems. This work was carried out in a commercial plantation of the Jalles Machado plant in the municipality of Goianésia in Goiás, Brazil. The values of spore density in the soil, mycorrhizal colonization rate in the roots and easily extractable glomalin were evaluated, and the associated fungal species were identified. There was no effect of sugarcane variety on the number of spores or the glomalin content in the soil. The conventional system presented significantly lower mycorrhizal colonization rates than did the organic system. The varieties cultivated under the conventional planting system showed a greater diversity of arbuscular mycorrhizal fungi, where 12 of the 13 different species of mycorrhizal fungi found in both cultivation systems occurred.
摘要：
有机生产系统越来越多地获得市场份额；然而，关于它们对甘蔗土壤微生物活性影响的研究还很少。丛枝菌根真菌对环境变化极为敏感,它们的活性可以用作有机系统和常规系统之间的比较和质量参数。这项工作的目的是评估两种生产系统下不同甘蔗品种的菌根活性。这项工作是在GoiásGoianésia市的JallesMachado工厂的商业种植园中进行的，巴西。土壤中孢子密度的值，根中的菌根定植率和易于提取的glomalin进行了评估，并鉴定了相关的真菌物种。甘蔗品种对土壤中孢子数量或glomalin含量没有影响。常规系统的菌根定植率显着低于有机系统。常规种植制度下栽培的品种显示出较强的丛枝菌根真菌多样性,在两种栽培系统中发现的13种不同菌根真菌中有12种发生。
