Mycorrhizae activity and diversity in conventional and organic apple orchards from Brazil
Mycorrhizae activity and diversity in conventional and organic apple orchards from Brazil
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DOI：
10.1016/j.soilbio.2005.12.008
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发表时间：
2006-07
影响因子：
9.7
通讯作者：
S. Purin;O. K. Filho;S. L. Stürmer
中科院分区：
文献类型：
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作者：
S. Purin;O. K. Filho;S. L. Stürmer
本研究的目的是表征传统的，有机苹果园和天然草地上的活动和多样性的丛枝菌根真菌（AMF）位于巴西南部在冬季和夏季的影响。AMF活性的测定方法为接种势（MIP）、菌丝长度（HL）、易提取的Bradford反应性土壤蛋白（BRSP）和总蛋白（BRSP）。AMF多样性用丰富度、Shannon多样性指数和孢子数表示。果园降低了土壤的MIP和增加HL相比，草地网站。容易提取的BRSP的量在果园之间和评估的季节之间没有差异，总体平均值为1.23mgg-1。然而，常规果园的总BRSP含量（4.55mgg-1）低于有机果园（4.91mgg-1）和天然草地（5.12mgg-1）。T-BRSP和总有机碳在草地上的冬季有很强的相关性，这表明该蛋白质的碳储量在该地区的原生土壤中的贡献。有机果园AMF丰富度最高，但常规果园的产孢量和Shannon多样性指数较大。我们的数据表明，常规果园促进AMF活性的自然条件的影响，被认为是一个不可取的做法，以保持土壤。
The aim of this study was to characterize the impacts of a conventional, an organic apple orchard and a native grassland on the activity and diversity of arbuscular mycorrhizal fungi (AMF) located at the south of Brazil during winter and summer. AMF activity was measured by the mycorrhizal inoculum potential (MIP), mycorrhizal fungal hyphal length (HL), easily extractable and total Bradford-reactive soil protein (BRSP). AMF diversity was represented by richness, Shannon diversity index and number of spores. Orchards reduced the MIP of the soil and increased the HL when compared to the grassland site. The amount of easily extractable BRSP was not different among orchards and between seasons evaluated, with overall mean value of 1.23mgg−1. However, the amount of total-BRSP was smaller in the conventional orchard (4.55mgg−1) than in the organic orchard (4.91mgg−1) and in the native grassland (5.12mgg−1). T-BRSP and total organic carbon were strongly correlated in the grassland during the winter, suggesting the contribution of this protein for carbon stocks in the native soil of this region. The organic orchard presented the highest AMF richness, but sporulation and Shannon diversity index were larger in the conventional orchard. Our data suggest that the conventional orchard promoted higher impacts on the natural condition of AMF activity, being considered an unadvisable practice to soil conservation.