Enhancing water productivity using alternative rice growing practices: a case study from Southern India
| Autor: | Yella Reddy Kaluvai, J. Deelstra, Udaya Sekhar Nagothu, Krishna Reddy Kakumanu, S. R. Kallam |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
business.industry 04 agricultural and veterinary sciences Agricultural engineering 01 natural sciences Irrigated agriculture Water productivity Water resources Crop Agriculture 040103 agronomy & agriculture Genetics 0401 agriculture forestry and fisheries Environmental science Animal Science and Zoology business Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | The Journal of Agricultural Science. 156:673-679 |
| ISSN: | 1469-5146 0021-8596 |
| Popis: | Saving water in irrigated agriculture is a high priority in areas with scarce water resources and impacted by climate change. This paper presents results of measurements on water productivity (WP) under alternative rice growing practices such as alternating wetting and drying, direct seeded rice, modified systems of rice intensification and conventional paddy rice (NI) in two selected districts (Guntur in Andhra Pradesh and Nalgonda in Telangana, India). Under alternative practices, the yields varied from 5.72 to 6.11 t/ha compared with 4.71 t/ha under paddy rice. The average water application varied from 991 to 1494 mm under alternative practices while average application in conventional paddy rice was 2242 mm. Higher yield and lower water application led to an increase in WP varying from 0.45 to 0.59 kg/m3 under alternative practices compared with 0.22 kg/m3 under conventional paddy rice. The measurements showed that less water can be used to produce more crop under alternative rice growing practices. The results are important for water-scarce areas, providing useful information to policy makers, farmers, agricultural departments and water management boards in devising future climate-smart adaptation and mitigation strategies. |
| Databáze: | OpenAIRE |
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