Long-term impact of soil and nutrient management practices on soil quality in rainfed Alfisols at Anantapur in Andhra Pradesh
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Title |
Long-term impact of soil and nutrient management practices on soil quality in rainfed Alfisols at Anantapur in Andhra Pradesh
Long-term impact of soil and nutrient management practices on soil quality in rainfed Alfisols at Anantapur in Andhra Pradesh |
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Creator |
ICAR_CRIDA
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Subject |
Soil quality, key indicators, tillage, INM, Alfisol, groundnut, castor
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Description |
Not Available
Impact of long-term use of soil and nutrient management treatments was studied at All India Coordinated Research Project for Dryland agriculture Anantapur in three on-going experiments. In experiment 1, the long-term integrated nutrient management treatments tested under groundnut system significantly influenced most of the soil quality parameters. The soil quality indices as influenced by different integrated nutrient management practices varied from 1.32 to 1.96 across the management treatments. The key soil quality indicators identified under this system along with their percent contributions were: EC (7%), OC (17%), available N (4%), available K (16%), exchangeable Ca (16%), exchangeable Mg (16%), DTPA- Fe (6%), DTPA-Zn (2%), and dehydrogenase activity (DHA) (16%). In experiment 2 comprising of tillage practices and nutrient management treatments using groundnut as test crop, the soil quality indices varied from 2.01 to 2.7. The parameters which emerged as key soil quality indicators were: pH, EC, exchangeable Ca, Mg, DTPA- Fe, available B, DHA and labile carbon (LC). Of all the indicators, LC played a major role in influencing or aggrading the quality of the soils followed by soil pH. Among the tillage practices, low tillage played a significant role in improving the soil quality (SQI 2.43) and proved superior, followed by conventional tillage practice (SQI 2.37). Among the nutrient treatments, sole 100% organic treatment (SQI 2.62) proved quite superior in improving the soil quality followed by conjunctive nutrient application viz., 50% organic + 50% inorganic (SQI 2.35). while the sole 100% inorganic nutrient application could maintain SQI value only up to 2.10. In experiment 3, where groundnut-castor was the crop rotation, soil quality indices varied from 0.85 to 1.73 across the treatments. The key soil quality indicators identified for groundnut-castor system along with their percent contributions were: EC (23%), available P (21%), available S (22%), available B (9%), LC (21%) and MWD (4%). Application of 100% N (inorganic) maintained significantly highest soil quality with SQI value of 1.73, followed by application of 50% N through gliricidia loppings + 50% N through inorganic source (SQI 1.52). This observation clearly indicated the proportionally equal and important role-played by EC, available P, available S and LC in influencing the quality of these Alfisols under castor-groundnut rotation. Not Available |
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Date |
2020-02-25T09:06:58Z
2020-02-25T09:06:58Z 2010 |
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Type |
Technical Report
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/32888 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Sharma, K. L. Srinivas Rao, Ch, Srinivas, K
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