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Sheshshayee, M. S.
- Nitrogen Uptake Rates and f-Ratios in the Equatorial and Southern Indian Ocean
Abstract Views :251 |
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Authors
Affiliations
1 Physical Research Laboratory, Ahmedabad 380 009, IN
2 Department of Crop Physiology, University of Agricultural Sciences, Bengaluru 560 065, IN
3 National Centre for Antarctic and Ocean Research, Vasco-da-Gama, Goa 403 804, IN
1 Physical Research Laboratory, Ahmedabad 380 009, IN
2 Department of Crop Physiology, University of Agricultural Sciences, Bengaluru 560 065, IN
3 National Centre for Antarctic and Ocean Research, Vasco-da-Gama, Goa 403 804, IN
Source
Current Science, Vol 108, No 2 (2015), Pagination: 239-245Abstract
We report data on nitrate, ammonium and urea uptake rates from the Equatorial and Southern Indian Oceans. Productivity (0.81-2.23 mmol Nm-2 d-1) over the Equatorial Indian Ocean was low, but the f-ratio (0.13-0.45) was relatively high. In the Southern Indian Ocean total N-uptake rate varied from 1.7 to 12.3 mmol Nm-2 d-1; it was higher in the Antarctic coast (69°S) and lower over most of the Southern Ocean, the lowest being at 58°S. The f-ratio also showed significant spatial variation, but was higher compared to values at the Equatorial Indian Ocean. The mean f-ratio in the Southern Indian Ocean was 0.50. The nitrate-specific uptake rates and f-ratios appear to have increased significantly in the recent past relative to earlier estimates. While productivity in the Southern Ocean is comparable to that in the Equatorial Indian Ocean, higher f-ratios in the former underscore its importance in the uptake of CO2.Keywords
Carbon Sequestration, f-Ratio, Nitrogenuptake, Primary Productivity, Southern Ocean.- M. Udayakumar (1946–2021)
Abstract Views :199 |
PDF Views:77
Authors
Affiliations
1 Crop Physiology, University of Agricultural Sciences, GKVK, Bengaluru 560 065, IN
2 Division of Biotechnology, Indian Institute of Horticultural Research, Bengaluru 560 089, IN
3 I&B Seeds Pvt Ltd, Bengaluru 560 060, IN
1 Crop Physiology, University of Agricultural Sciences, GKVK, Bengaluru 560 065, IN
2 Division of Biotechnology, Indian Institute of Horticultural Research, Bengaluru 560 089, IN
3 I&B Seeds Pvt Ltd, Bengaluru 560 060, IN
Source
Current Science, Vol 121, No 4 (2021), Pagination: 588-589Abstract
No Abstract.Keywords
No keywords- Nitrogen Use Efficiency in Tomato (Lycopersicon esculentum L.) and French Bean (Phaseolus vulgaris L.) as Influenced by Coating of Urea with Neem Oil and Graded Levels of Nitrogen
Abstract Views :187 |
PDF Views:118
Authors
Affiliations
1 Division of Soil Science and Agricultural Chemistry, Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, IN
2 Department of Plant Physiology, University of Agricultural Sciences, Bangalore-560 065, IN
1 Division of Soil Science and Agricultural Chemistry, Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, IN
2 Department of Plant Physiology, University of Agricultural Sciences, Bangalore-560 065, IN