Effect of resource-conserving techniques on soil microbiological parameters under
Indian Agricultural Research Journals
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Title |
Effect of resource-conserving techniques on soil microbiological parameters under
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Creator |
SINGH, GEETA
MARWAHA, T S KUMAR, DINESH |
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Subject |
Bed planting; Conventional tillage; Maize; Soil biological indices; Wheat
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Description |
An experiment was conducted during 2000–07 to study the impact of 2 tillage intensities (bed planting and conventional), 3 levels of irrigation (sub-optimal, optimal and supra-optimal) in combination with 8 nitrogen management systems on the soil microbial properties under long-term maize (Zea mays L.)–wheat (Triticum aestivum L. emend. Fiori & Paol.) crop rotation. The mean value of soil respiration was 32% higher in bed planting over the conventional tillage. At sub-optimal, optimal and supra-optimal irrigation intensity, bed planting tillage recorded 47, 35 and 19% higher value respectively, of soil respiration over the corresponding treatments under conventional tillage. The highest dehydrogenase enzyme activity (129.05 mg tri phenyl formazone (TPF)/g soil/24 hr) was recorded in treatment where biofertilizer supplemented the 25% N requirement and the least was recorded where recommended dose of nitrogen was supplied as urea. Soils under bed planting method/zero tillage registered significantly higher dehydrogenase enzyme activity and microbial biomass carbon than the conventional tillage at all the 3 irrigation regimes, receiving different N sources. Soil microbial biomass carbon was significantly higher under bed planting method (13%) than the conventional tillage. At the 3 irrigation regimes, namely sub- optimal, optimal and supra-optimal no significant difference was observed in soil microbial biomass carbon. Application of N as organics significantly increased (41%) soil microbial biomass carbon over the soils receiving the recommended dose of nitrogen as urea. This study demonstrates the positive influence of conservation tillage (bed planting/zero tillage) method on selected biological parameters, especially, in soils receiving a combination of organic and inorganic N sources.
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Publisher |
The Indian Journal of Agricultural Sciences
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Contributor |
ICAR
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Date |
2011-01-03
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Type |
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion Peer-reviewed Article |
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Format |
application/pdf
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Identifier |
http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/2434
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Source |
The Indian Journal of Agricultural Sciences; Vol 79, No 2 (2009)
0019-5022 |
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Language |
eng
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Relation |
http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/2434/574
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Rights |
Copyright (c) 2014 The Indian Journal of Agricultural Sciences
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