Tek B Sapkota1, Mangi L Jat2, Dharamvir S Rana3, Arun Khatri-Chhetri4, Hanuman S Jat5, Deepak Bijarniya6, Jhabar M Sutaliya7, Manish Kumar8, Love K Singh8, Raj K Jat9, Kailash Kalvaniya10, Gokul Prasad10, Harminder S Sidhu8, Munmun Rai10, T Satyanarayana11, Kaushik Majumdar12. 1. International Maize and Wheat Improvement Center (CIMMYT), El Batan, Mexico. 2. International Maize and Wheat Improvement Center (CIMMYT), New Delhi, India. M.Jat@cgiar.org. 3. International Rice Research Institute (IRRI), NASC Complex, New Delhi, 110012, India. 4. CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS), CIAT-Bioversity Alliance, Cali, Colombia. 5. ICAR-Central Soil Salinity Research Institute (CSSRI), Karnal, Haryana, India. 6. International Maize and Wheat Improvement Center (CIMMYT), CSSRI, Karnal, India. 7. CCS Haryana Agriculture University, Hisar, Haryana, India. 8. International Maize and Wheat Improvement Center (CIMMYT), Borlaug Institute for South Asia (BISA), Ludhiana, Punjab, India. 9. International Maize and Wheat Improvement Center (CIMMYT), Borlaug Institute for South Asia (BISA), Pusa, Samastipur, Bihar, India. 10. International Maize and Wheat Improvement Center (CIMMYT), New Delhi, India. 11. International Plant Nutrition Institute (IPNI), Gurgaon, Haryana, 122001, India. 12. African Plant Nutrition Institute (APNI), & Univerśite Mohammed VI Polytechnique, Benguérir, Morocco.
Abstract
Reduction of excess nutrient application and balanced fertilizer use are the key mitigation options in agriculture. We evaluated Nutrient Expert (NE) tool-based site-specific nutrient management (SSNM) in rice and wheat crops by establishing 1594 side-by-side comparison trials with farmers' fertilization practices (FFP) across the Indo-Gangetic Plains (IGP) of India. We found that NE-based fertilizer management can lower global warming potential (GWP) by about 2.5% in rice, and between 12 and 20% in wheat over FFP. More than 80% of the participating farmers increased their crop yield and farm income by applying the NE-based fertilizer recommendation. We also observed that increased crop yield and reduced fertilizer consumption and associated greenhouse gas (GHG) emissions by using NE was significantly influenced by the crop type, agro-ecology, soil properties and farmers' current level of fertilization. Adoption of NE-based fertilizer recommendation practice in all rice and wheat acreage in India would translate into 13.92 million tonnes (Mt) more rice and wheat production with 1.44 Mt less N fertilizer use, and a reduction in GHG of 5.34 Mt CO2e per year over farmers' current practice. Our study establishes the utility of NE to help implement SSNM in smallholder production systems for increasing crop yields and farmers' income while reducing GHG emissions.
Reduction of excess nutrient application and balanced fertilizer use are the key mitigation options in agriculture. We evaluated Nutrienpan>t Expert (pan> class="Chemical">NE) tool-based site-specific nutrient management (SSNM) in rice and wheat crops by establishing 1594 side-by-side comparison trials with farmers' fertilization practices (FFP) across the Indo-Gangetic Plains (IGP) of India. We found that NE-based fertilizer management can lower global warming potential (GWP) by about 2.5% in rice, and between 12 and 20% in wheat over FFP. More than 80% of the participating farmers increased their crop yield and farm income by applying the NE-based fertilizer recommendation. We also observed that increased crop yield and reduced fertilizer consumption and associated greenhouse gas (GHG) emissions by using NE was significantly influenced by the crop type, agro-ecology, soil properties and farmers' current level of fertilization. Adoption of NE-based fertilizer recommendation practice in all rice and wheat acreage in India would translate into 13.92 million tonnes (Mt) more rice and wheat production with 1.44 Mt less N fertilizer use, and a reduction in GHG of 5.34 Mt CO2e per year over farmers' current practice. Our study establishes the utility of NE to help implement SSNM in smallholder production systems for increasing crop yields and farmers' income while reducing GHG emissions.
Authors: T Garnett; M C Appleby; A Balmford; I J Bateman; T G Benton; P Bloomer; B Burlingame; M Dawkins; L Dolan; D Fraser; M Herrero; I Hoffmann; P Smith; P K Thornton; C Toulmin; S J Vermeulen; H C J Godfray Journal: Science Date: 2013-07-05 Impact factor: 47.728
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