PRODUCTIVITY, SUSTAINABILITY AND ECONOMICS OF RICE-RICE CROPPING SYSTEM AS INFLUENCED BY ZN APPLICATION

B. JENA¹*, R.K. NAYAK², P.K. BISWAS³, J. DAS⁴, A.K. SHUKLA^5
1Micronutrient Laboratory, Department of Soil Science and Agricultural Chemistry, Orissa University of Agriculture & Technology, Bhubaneswar, 751003, Odisha, India
²Micronutrient Laboratory, Department of Soil Science and Agricultural Chemistry, Orissa University of Agriculture & Technology, Bhubaneswar, 751003, Odisha, India
³Micronutrient Laboratory, Department of Soil Science and Agricultural Chemistry, Orissa University of Agriculture & Technology, Bhubaneswar, 751003, Odisha, India
⁴Micronutrient Laboratory, Department of Soil Science and Agricultural Chemistry, Orissa University of Agriculture & Technology, Bhubaneswar, 751003, Odisha, India
⁵Micronutrient Laboratory, Department of Soil Science and Agricultural Chemistry, Orissa University of Agriculture & Technology, Bhubaneswar, 751003, Odisha, India
* Corresponding Author : bjena8763@gmail.com

Received : 01-05-2019     Accepted : 26-05-2019     Published : 30-05-2019
Volume : 11     Issue : 10       Pages : 8437 - 8440
Int J Agr Sci 11.10 (2019):8437-8440

Keywords : Productivity, Rice-Rice, Zn, Zn Pools
Academic Editor : Dr Arshad Bhat
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to the Project Coordinator, AICRP on Micronutrient Project as well as ICAR for funding support. Authors are also thankful to Micronutrient Laboratory, Department of Soil Science and Agricultural Chemistry, Orissa University of Agriculture & Technology, Bhubaneswar, 751003, Odisha, India
Author Contribution : All authors equally contributed

Rice-Rice cropping system is one of the major cropping systems of Odisha occupying an area of 3.31 lakh ha with a productivity of 2.5 t/ha which is much below the national average (Odisha Statistics). Zinc deficiency is a common under rice cultivation. The soils of Odisha are deficient in Zn up to the extent of 28 %. Nutrient transformations under submerged condition are different from that of other aerobic systems. Zn utilization efficiency is 5-10 %.Losses of yield of 20% or more as a result of hidden zinc deficiency can have an economic impact on the farmer. To find out the optimum dose and frequency of Zn application a field experiment was conducted by taking 4 graded doses of Zn applied through 3 frequencies of once in six year ,alternate year up to 6 year ,every year upto six year to the first crop of a rice - rice cropping system grown in an Inceptisols of central farm, OUAT, Bhubaneswar, Odisha. After every 2 year of Zn application Zn fractionation study was conducted to find out the possible fate of Zn application on various Zn pools and on yield of rice - rice cropping system. Results after 5 cropping cycles revealed that Rice crop responded to Zn application with respect to increasing dose and frequency with a highest mean grain yield of 4.3 t/ha as well as cumulative yield of 21.3 t/ha in the treatment of every year Zn application @ 5 kg/ha with highest gross return of 1.33 per rupee investment . Among the pools affected by Zn application was organic and amorphous oxide bound forms .Residual fraction constituted the highest percent of total Zn among all fractions .Hence for rice growing lowland soils of Odisha application of Zn @ 2.5 kg/ha every year to the first crop of a rice-rice cropping system can produce a sustainable yield.

1. Bell and Dell (2008) Micronutrients for sustainable food, feed, fibre and bioenergy production First edition, IFA, Paris, France, December
2. Regmi B., Rengel Z. and Shaberi-Khabaz H. (2010) 19th World Congress of Soil Science, Soil Solutions for a Changing World. 1-6 August 2010, Brisbane, Australia. Published on DVDRico M.I., Alvarez J.M., Lopez-Valdivia L.M., Novillo J., Obrador A. 2009. Manganese and zinc in acidic agricultural soils from central Spain: Distribution and phytoavailability prediction with chemical extraction tests. Soil Science.174, 94-104.
3. Shukla A.K., Tiwari Pankaj and Prakas Chandra (2015) Indian J. of Fertilizer, 10(12), 94-112.
4. Jackson M.L. (1973) Soil chemical analysis. Prentice Hall of India (P) Ltd., New Delhi.
5. Lindsay W.L. and Norvell W.A. (1978) Soil Science Society of America Journal, 42,421-428.
6. Adhikari T. and Rattan R.K. (2007) Communications in Soil Science and Plant Analysis, 38, 2779-2798.
7. Rico M.I., Alvarez J.M, Lopez-Valdivia L.M., Novillo J., Obrador A. (2009) Soil Science, 174, 94-104.
8. Cheng M. and Ma L.Q. (2001) Soil Sci. Soc. Am. J., 65, 491-499.
9. Andrzejewski M. and Dorêgowska M. (1986) Rocz. Glebozn, 37(2-3), 323-332.