Soil Enzymes Activities in Irrigated and Rain-Fed Vertisols of the Semi-Arid Tropics of Sudan

Abdalla, Mubarak Abdelrahman; Langer, Uwe

doi:10.3923/ijss.2009.67.79

Cited by 13 publications

(2 citation statements)

References 55 publications

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“…Changes in microbial population and activity precede detectable changes in soil physico-chemical properties as microorganisms have intimate relations with their surroundings due to their high surface to volume ratio (Pankhurst et al, 1995). Soil enzymes derived primarily from soil microbes are considered as indicative measures of soil fertility (Zahir et al, 2001) as they participate in elemental cycling and decomposition of organic residues and are considered fundamentally best indicators for soil quality (Caldwell, 2005;Venkatesan and Senthurpandian, 2006;Kizilkaya et al, 2007;Abdalla and Langer, 2009). Therefore, their activity is considered an indicator of the oxidative metabolism in soil and thus also of microbial activity (Quilchano and Maranon, 2002).…”

Section: Introductionmentioning

confidence: 99%

Comparative assessment of microbial enzyme activity with compost and sewage sludge amendment

Kaur

Sharma

Singh

2015

JANS

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Changes in soil microbial activities were investigated to examine the effect of aerobically digested sewage sludge (SS) and compared with compost under incubation conditions over 63 days. Sandy soil was amended with 0.25, 0.5, 1.0 and 1.5 % w/w of compost and sewage sludge. Enzyme activity (dehydrogenase, alkaline phosphatase, acid phosphatase, phytase and urease) were examined at an interval of 3, 7, 14, 21, 28, 42 and 63 days. At the end of the experiment the change in organic carbon, nitrogen, potassium and phosphorus was also recorded. Results indicated that enzyme activities were substantially enhanced in presence of both amendments for first few days and the higher increases were measured at 1.5% of compost and sewage sludge amendment. Then an overall decrease in enzyme activity was recorded. Both the amendments also significantly increased the organic carbon, nitrogen and potassium of the soil while increase in available phosphorus was only recorded in treatment receiving compost. The present experiment indicated that addition of compost and sewage sludge have positive effect on soil microbial activity and can be safely used as soil amendment without having any adverse effect. Though, a previous examination of sewage sludge to be used must be made for heavy metals and pathogens.

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Section: Introductionmentioning

confidence: 99%

Comparative assessment of microbial enzyme activity with compost and sewage sludge amendment

Kaur

Sharma

Singh

2015

JANS

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“…The behavior of pesticides in the environment depends on its stability, physico-chemical properties, the nature of the medium into which it is applied, the organisms present, and the prevailing climatic conditions (Ahemad et al, 2009;Ismail et al, 2009;Abou Ayana et al, 2011). Some of the negative effects of pesticides include low crop yield (Fox et al, 2007;Ahemad and Khan, 2012a), destruction of soil micro-fauna and flora (Chowdhury et al, 2008) and their beneficial physiological activities (Madhaiyan et al, 2006;Ahemad and Khan, 2010), undesirable residue accumulation in food crops (Mattina et al, 2000) and decreased soil fertility (Abdalla et al, 2009). Further, they affect the soil microbial communities by adversely decreasing protein synthesis and inhibiting various metabolic enzymes (Boldt and Jacobsen, 1998;Ahemad and Khan, 2012b;Ahemad and Khan, 2012c).…”

Section: Introductionmentioning

confidence: 99%

Growth suppression of legumes in pyriproxyfen stressed soils:<br>A comparative study

Ahemad

2014

Emir. J. Food Agric

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Insecticides are commonly used to combat economically important insect pests in agriculture. These plantprotecting agents severely decline crop productivity by affecting different plant growth parameters. The assessment of phytotoxicity of insecticides are generally, confined to one plant species and broad studies concomitantly evaluating the insecticide effect on more than one crop specifically, the legume are scarce. Hence, this study was designed to assess the effect of technical grade insecticide, pyriproxyfen simultaneously on legumes like chickpea, pea, lentil and greengram. Pyriproxyfen showed the highest toxicity to root and shoot dry biomass, leghaemoglobin, chlorophyll content and seed protein in chickpea, nodule numbers in pea, shoot nitrogen and root phosphorus in greengram, and nodule biomass, root nitrogen, root phosphorus, shoot phosphorus and seed yield in lentil. For instance, pyriproxyfen decreased the number of nodules (percent decline over controls) in each legume in an order: pea (44) > greengram (14) > chickpea (5) = lentil (5). Similarly, pyriproxyfen mediated percent decline in leghaemoglobin occurred in the order like: chickpea (69) > lentil (25) > pea (18) > greengram (12). Generally, pyriproxyfen affected most adversely the growth of both chickpea and lentil. It is concluded that the extent of phyto-toxicity of insecticide and the type of plant organs affected might differ among plant species.

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Relationship between soil P fractions and microbial biomass in an oligotrophic grassland‐desert scrub system

Perroni

García‐Oliva

Tapia-Torres

et al. 2014

Ecological Research

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Phosphorus (P) is an essential element of the biosphere, both as a constituent of living organisms and as a regulator of biological processes. The Cuatro Ciénegas Basin in the central Chihuahuan Desert of Mexico is characterized by extreme P oligotrophy. The aim of this study was to quantify P distribution in soil P fractions, P sorption capacity, and P in microbial biomass in a desert scrub and grassland soil system in the Churince area of the Cuatro Ciénegas Basin over summer and winter seasons. Our objective, as part of an exploration of ecosystem functioning, was to ascertain the relationship between soil P fractions and P in microbial biomass. Our results demonstrate a scarcity of P, mainly in grassland, and also a higher P sorption capacity in grassland soil than in desert scrub. Desert scrub soil retained more P (228 ± 5 μg g−1 dry soil) than grassland soil (87 ± 10 μg g−1 dry soil), mainly in inorganic forms, but grassland soil retained more P in accessible organic forms. We suggest that biotic controls regulated by access to water shape the dynamics of soil P availability in the Churince grassland‐desert scrub system.

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Soil Enzymes Activities in Irrigated and Rain-Fed Vertisols of the Semi-Arid Tropics of Sudan

Cited by 13 publications

References 55 publications

Comparative assessment of microbial enzyme activity with compost and sewage sludge amendment

Comparative assessment of microbial enzyme activity with compost and sewage sludge amendment

Growth suppression of legumes in pyriproxyfen stressed soils:<br>A comparative study

Relationship between soil P fractions and microbial biomass in an oligotrophic grassland‐desert scrub system

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