Manna, M.C. and Singh, M.V. (2001) Long-term efects of intercropping and bio-litter recycling on soil biological activity and fertility status of sub-tropical soils. Bioresource Technology, 76 (2). pp. 143-150.
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Abstract
On-farm ®eld experiments were carried out at two sites having 38- and 10-year-old orchard cropping systems under sub-tropical climatic regions to evaluate changes in organic carbon accumulation and chemical and microbiological properties of the soils. Under a system of di�erent intercropped fruit trees, the cultivation of coconut (Cocos nucifera L.) intercropped with guava (Psidium guajava L.) enhanced the soil microbial activity approximately 2-fold after 38 yrs over 10 yrs of the same intercropped system. Soil organic carbon increased from 3.4 to 7.8 and 2.4 to 6.2 g kgÿ1 after 38 and 10 yrs, respectively, following the establishment of orchards. The increase was attributed to greater recycling of bio-litters. Levels of dehydrogenase, phosphatase and soil microbial biomass under ®eld conditions generally depended more on the nature of the cropping system than on soil types. Similarly, average carbon inputs of bio-litter to the soil in monocrop (0.98 Mg haÿ1 yrÿ1) was less than intercropped fruit trees (2.07 Mg haÿ1 yrÿ1). The average level of soil microbial biomass carbon was 1158 kg haÿ1 (0±0.15 m depth) and the organic carbon turnover rate was 8.5 yrÿ1 after 38 yrs of intercropped fruit trees, which resulted in a lower ratio (1.81) of carbon inputs to soil microbial biomass carbon.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Intercropped fruit trees; Vegetable; Bio-litter recycling; FYM; Soil microbial activity; Carbon turnover rate |
| Author Affiliation: | Indian Institute of Soil Science, Nabibagh, Berasia Road, Bhopal 462038, India |
| Subjects: | Plant Production > Croping Systems |
| Divisions: | Other Crops |
| Depositing User: | Sandhya Gir |
| Date Deposited: | 04 Aug 2011 05:20 |
| Last Modified: | 04 Aug 2011 05:20 |
| Official URL: | http://dx.doi.org/doi:10.1016/S0960-8524(00)00088-... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/2531 |
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