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首页> 外文期刊>International journal of soil science >Soil Microbial Activity and its Relation to Soil Indigenous Properties in Semi-arid Alluvial and Estuarine Soils of Mahi River Basin, Western India
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Soil Microbial Activity and its Relation to Soil Indigenous Properties in Semi-arid Alluvial and Estuarine Soils of Mahi River Basin, Western India

机译：印度西部马伊河流域半干旱冲积和河口土壤中的土壤微生物活性及其与土壤特性的关系

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Several studies on the continental Quaternary sedimentation, stratigraphy and landscape evolution of the Mahi River basin exist, however, the microbial activity including its relation with soil physical and chemical properties has not been explored. In the present investigation, estuarine and alluvial soil microbial activity (as an index of soil enzymes i.e., dehydrogenase and protease) and its relation with soil properties such as Soil Organic Matter (SOM), Soil Moisture Content (SMC), soil texture (sand, silt and clay) and soil pH has been addressed. The study was conducted at 7 sites spread over 3 locations (2 were from alluvial zone and 1 was from estuarine zone), each sampled at various depths along a 30 km long stretch of the Mahi River in western India. High microbial activity was noticed in estuarine soils than in alluvial soils. Dehydrogenase activity in both alluvial and estuarine soils indicated positive correlations with SOM, SMC and a moderate correlation with clay content. On the contrary, the protease activity showed poor correlation with SOM, SMC and clay content of alluvial soils however, significant positive correlations were noticed in estuarine soils. No correlation was observed between these two enzymes. A negative correlation existed between soil depth and both the enzymes in alluvial soils. The findings demonstrate that SOM and SMC, clay content and soil depth are the important determinants for dehydrogenase activity (indicative of organic matter transformation) in both alluvial and estuarine soils, whereas the soil depth is the lone determinant for protease in alluvial soils and its correlation with other properties in estuarine soils is site specific.
机译：已有关于马希河流域第四纪沉积，地层学和景观演化的研究，但尚未探讨微生物活动及其与土壤理化性质的关系。在本研究中，河口和冲积层土壤微生物活性（作为土壤酶（即脱氢酶和蛋白酶）的指标）及其与土壤特性的关系，例如土壤有机质（SOM），土壤水分（SMC），土壤质地（沙土） ，淤泥和粘土）和土壤pH值已得到解决。该研究在分布于3个位置的2个地点（其中2个来自冲积区，1个来自河口区）进行，每个地点都沿印度西部Mahi河长30公里的不同深度进行了采样。河口土壤中的微生物活性高于冲积土壤。冲积和河口土壤中的脱氢酶活性均与SOM，SMC呈正相关，与粘土含量呈中等相关。相反，蛋白酶活性与冲积土壤的SOM，SMC和黏土含量之间的相关性较弱，但是在河口土壤中却发现了显着的正相关性。在这两种酶之间未观察到相关性。土壤深度与冲积土壤中的两种酶之间均呈负相关。研究结果表明，SOM和SMC，黏土含量和土壤深度是冲积土壤和河口土壤中脱氢酶活性的重要决定因素（指示有机质转化），而土壤深度是冲积土壤中蛋白酶及其相关性的唯一决定因素。在河口土壤中具有其他特性是特定于地点的。

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