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Halli, Hanamant M.
- Rising temperature coupled with reduced rainfall will adversely affect yield of kharif sorghum genotypes
Abstract Views :123 |
PDF Views:73
Authors
Manjanagouda S. Sannagoudar
1,
R. H. Patil
2,
G. A. Rajanna
3,
Avijit Ghosh
1,
Amit K. Singh
1,
Hanamant M. Halli
4,
Vanitha Khandibagur
5,
Sunil Kumar
1,
R. V. Kumar
1
Affiliations
1 ICAR-Indian Grassland and Fodder Research Institute, Jhansi 284 003, India, IN
2 Department of Agricultural Meteorology, University of Agricultural Sciences, Dharwad 580 005, India, IN
3 ICAR-Directorate of Groundnut Research, Regional Station, Rekalakunta, Ananthapur 515 001, India, IN
4 ICAR-National Institute of Abiotic Stress Management, Pune 413 115, India, IN
5 University of Horticultural Sciences, Bagalkot 587 102, India, IN
1 ICAR-Indian Grassland and Fodder Research Institute, Jhansi 284 003, India, IN
2 Department of Agricultural Meteorology, University of Agricultural Sciences, Dharwad 580 005, India, IN
3 ICAR-Directorate of Groundnut Research, Regional Station, Rekalakunta, Ananthapur 515 001, India, IN
4 ICAR-National Institute of Abiotic Stress Management, Pune 413 115, India, IN
5 University of Horticultural Sciences, Bagalkot 587 102, India, IN
Source
Current Science, Vol 124, No 8 (2023), Pagination: 921-927Abstract
The DSSAT-CERES-Sorghum model was used to test performance of four kharif sorghum genotypes to changes in rainfall and temperature over three sowing windows. Three rainfall scenarios (no change, –10%, –20%) and three temperature scenarios (no change, +1°C, +2°C) were incorporated to past 32 year (1985 to 2016) of recorded weather data, and average simulated outputs showed that, irrespective of cultivar and sowing time, reduction in rainfall had minimal effect on crop duration, but lowered grain yield by 3.34% and 12.85% respectively, at –10% and –20% rainfall scenarios. Rise in temperature from current levels to +1°C and +2°C reduced crop duration by 7 and 12 days, while final yield reduced by 9.4% and 20% respectively. Further, per cent reduction in yield increased with delay in sowing under both scenarios. This effect was more pronounced with combined effect of reduced rainfall and increased temperature. CSH-16 cultivar performed the best across scenarios, while the remaining cultivars followed the order: CSV-17 > CSV-23 > CSH-23. Early sowing (15 June) is suitable to attain higher yield compared to 30 June and 15 July sowing across scenariosKeywords
Grain yield, kharif season, rainfall, sensiti-vity analysis, sorghum genotypes, temperature.Full Text
References
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- Mapping of Soil Test-Based Spatial Fertilizer Recommendations for Paddy and Maize Using GIS, GPS and STCR Approaches in A Micro-Watershed of Karnataka, India
Abstract Views :91 |
PDF Views:58
Authors
Affiliations
1 Department of Agronomy, University of Agricultural Sciences, Bengaluru 560 065, India., IN
2 School of Soil Stress Management, National Institute of Abiotic Stress Management, Pune 413 115, India., IN
3 ICAR-Indian Institute of Seed Science, Regional Station, GKVK Campus, Bengaluru 560 065, India., IN
1 Department of Agronomy, University of Agricultural Sciences, Bengaluru 560 065, India., IN
2 School of Soil Stress Management, National Institute of Abiotic Stress Management, Pune 413 115, India., IN
3 ICAR-Indian Institute of Seed Science, Regional Station, GKVK Campus, Bengaluru 560 065, India., IN
Source
Current Science, Vol 124, No 10 (2023), Pagination: 1160-1166Abstract
A case study was undertaken at the Honnavalli micro-watershed of Hassan district, Karnataka, India, to prepare digital maps for site-specific fertilizer recommendations for the major crops (paddy and maize) using STCR approach. The map shows that the recommended dose of N fertilizer for paddy is 148, 111, 82, 54, 26, –8, –67 and –108 kg ha–1 for the soil available N status 500 kg respectively. Similarly, for maize it is 290, 286, 283, 281, 279, 276, 268 and 259 kg ha–1 for 500 kg ha–1 respectively. Therefore, the study has implications on reducing consumption of fertilizers (24–45% for N; 12–15% for P and 8–32% for K), thereby reducing the cost of cultivation besides achieving higher nutrient use efficiency.Keywords
Fertilizer Recommendations, Micro-Watershed, Paddy, Maize, Soil Nutrients, Targeted Yield.Full Text
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