Hydrolytic enzyme activities in agricultural and forest soils. Some implications for their use as indicators of soil quality
نویسندگان
چکیده
منابع مشابه
County-Scale Spatial Distribution of Soil Enzyme Activities and Enzyme Activity Indices in Agricultural Land: Implications for Soil Quality Assessment
Here the spatial distribution of soil enzymatic properties in agricultural land was evaluated on a county-wide (567 km(2)) scale in Changwu, Shaanxi Province, China. The spatial variations in activities of five hydrolytic enzymes were examined using geostatistical methods. The relationships between soil enzyme activities and other soil properties were evaluated using both an integrated total en...
متن کاملVariation in pH optima of hydrolytic enzyme activities in tropical rain forest soils.
Extracellular enzymes synthesized by soil microbes play a central role in the biogeochemical cycling of nutrients in the environment. The pH optima of eight hydrolytic enzymes involved in the cycles of carbon, nitrogen, phosphorus, and sulfur, were assessed in a series of tropical forest soils of contrasting pH values from the Republic of Panama. Assays were conducted using 4-methylumbelliferon...
متن کاملrelationships between some soil quality indicators in different agricultural soils from varamin, iran
soil quality is a necessary indicator of land management. different indices are applied to evaluate farming systems, soil types and land uses based on soil quality. the slope of retention curve at its inflection point has been defined as soil physical quality index (si) but the relationships between si and penetration resistance (pr), the least limiting water range (llwr), and available water c...
متن کاملEnzyme activities in agricultural soils fumigated with methyl bromide alternatives
Pre-plant fumigation of agricultural soils with a combination of methyl bromide (MeBr) and chloropicrin (CP) to control nematodes, soilborne pathogens and weeds has been a common practice in strawberry (Fragaria X ananassa Duchesne) production since the 1960s. MeBr will be phased out by 2005, but little is known about the impacts of alternative fumigants on soil microbial processes. We investig...
متن کاملGeneralist Entomopathogens as Biological Indicators of Deforestation and Agricultural Land Use Impacts on Waikato Soils
New Zealand Journal of Ecology (1998) 22(2): 189-196 ©New Zealand Ecological Society limitation on the sustainability of pastoral land use in New Zealand and this issue has been heightened by recent resource management legislation (Blaschke et al., 1992). In contrast, there have been few investigations on the effects of forest removal on the New Zealand soil fauna (Yeates, 1991). Contraction in...
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ژورنال
عنوان ژورنال: Soil Biology and Biochemistry
سال: 2008
ISSN: 0038-0717
DOI: 10.1016/j.soilbio.2008.03.015