Fosfato e micorriza na estabilidade de agregados em amostras de latossolos cultivados e não-cultivados
Fosfato e micorriza na estabilidade de agregados em amostras de latossolos cultivados e não-cultivados
复制标题
农村耕地和非耕地集体的粮食和微生物的建立
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
P. E. F. D. Motta
中科院分区：
文献类型：
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作者：
Júlio César Azevedo Nóbrega;J. M. Lima;N. Curi;J. O. Siqueira;P. E. F. D. Motta
在热带地区，关于土壤微生物对土壤团聚体稳定性的贡献的资料很少。土壤管理、作物和施肥会影响土壤中的真菌种类，也会影响团聚体的稳定性。本研究旨在评价早作、施磷肥、接种AMF、以及种草和大豆对营养不良和营养不良红壤的几何平均直径（GMD）、颗粒絮凝指数、根系干物质和菌丝总长度的影响。将自然条件下和已栽培的土壤样品带到温室，进行磷肥和接种。然后，将它们与腕足菌和大豆进行两次栽培。结果表明，预耕土壤菌丝总长度和团聚体稳定性（GMD）较低，而接种后根据磷水平提高了这些参数。磷肥通过增加菌丝总长度和根系干物质间接提高团聚体稳定性。
In the tropics there is little information on the contribution of soil microorganisms on aggregate stability in the soils. Soil management, crop and fertilization can affect the fungi specie in soil, and also affect aggregate stability. This study attempted to evaluate the effect of earlier cropping, phosphate, inoculation with AMF, and brachiaria and soybean on the geometric mean diameter (GMD), particle flocculation index, root dry matter, and total hyphal length, in dystrophic Red Latosol and dystroferric Red Latosol (both Oxisols). Samples of both soils under natural condition and previously cultivated were brought to the green house and received P fertilization and inoculation. Then, they were cultivated twice with brachiaria and soybean. The results showed that the previously cultivated soils had lower total hyphal length and lower aggregate stability (lower GMD), whereas inoculation increased these parameters according to P level. Phosphate fertilization had an indirect benefit on aggregate stability by increasing total hyphal length and root dry matter.