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  • 1
    Electronic Resource
    Electronic Resource
    Effect of insecticides on the availability of nutrients, nitrogen fixation, and phosphate solubility in the rhizosphere soil of rice (1994)
    Springer
    Biology and fertility of soils 18 (1994), S. 37-41 
    Details
    ISSN: 1432-0789
    Keywords: Available nutrients ; Insecticides ; Microortanisms ; Nitrogen fixation ; Phosphate solubilization ; Rhizosphere soil ; Rice yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A field experiment was conducted to investigate the effects of 1,2,3,4,5,6-hexachlorocyclohexane (BHC), phorate, carbofuran, and fenvalerate, at their recommended doses, on some chemical and microbiological properties of the rhizosphere soil in relation to rice yields. In general, the insecticides had a beneficial effect on rhizosphere soil properties. Carbofuran strongly stimulated the mineralization of organic C. BHC and phorate led to the retention of less total N in the soil. BHC released more NH inf4 sup+ -N than the other insecticides. Phorate, however, liberated the most NO inf3 sup- -N. Phorate and fenvalerate released more available P than BHC and carbofuran did. All the insecticides stimulated the proliferation of aerobic non-symbiotic N2-fixing and phosphate-solubilizing microorganisms, resulting in an overall increase in rice yield. BHC had the greatest effect on rice yields, followed by phorate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336442
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Recycling of organic matter through mulch in relation to chemical and microbiological properties of soil and crop yields (1980)
    Springer
    Plant and soil 56 (1980), S. 273-281 
    Details
    ISSN: 1573-5036
    Keywords: Actinomycetes ; Azotobacter ; Alluvial soil ; Available nitrogen ; Available phosphorus ; Bacteria ; Fungi ; Green gram ; Maize ; Mulching ; Organic matter ; Recyling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Field experiments were conducted to investigate the effect of organic mulching on the nutrient status, microbiological properties and the yield of maize and green gram crops. Soil organic carbon and humin and humus carbon of the fallow and the cropped soils were augmented by mulching. More of nitrogen, available phosphorus and ammoniacal and nitrate nitrogen were found in mulched soils. Soil reaction was not affected by mulching. Mulched treatments maintained more of soil moisture and soil temperature lowered during summer and rainy seasons. Population of bacteria, fungi, actinomycetes and Azotobacter were augmented in mulched treatments at all the stages of sampling. Mulching significantly increased the grain and straw yield of both the crops. The nitrogen uptake by grain was higher in mulched than in the unmulched treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02205856
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Insecticidal effects on soil microorganisms and their biochemical processes related to soil fertility (1998)
    Springer
    World journal of microbiology and biotechnology 14 (1998), S. 903-909 
    Details
    ISSN: 1573-0972
    Keywords: Insecticides ; microorganisms ; N2-fixation ; P-solubilization ; population ; predominant genera ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Among the four insecticides under study, hexachlorocyclohexane (BHC) followed by phorate significantly stimulated the populations of (total) bacteria, actinomycetes, fungi, aerobic non-symbiotic N2-fixing bacteria and P-solubilizing microorganisms in soil. Carbofuran significantly stimulated total as well as N2-fixing bacteria. Fenvalerate had no effect on P-solubilizers. All the insecticides stimulated the proportion of Penicillium in soil. Similarly, Pseudomonas with BHC, Sarcina with phorate, Corynebacterium, Azotobacter and Streptomyces with fenvalerate were also stimulated. On the other hand, Erysipelothrix with BHC, Staphylococcus with phorate, Staphylococcus, Nocardia and Fusarium with fenvalerate were inhibited. Almost all the insecticides reduced the proportions of Micrococcus and Rhizopus in soil. Insecticides also augmented the non-symbiotic N2-fixing and P-solubilizing capacities of the soil and the augmentation was more pronounced with BHC followed by phorate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008820908917
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    Paper (German National Licenses)
    Fulltext
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