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International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad part of the excess nutrients and also water, resulting in more balanced macronutrient cation ratios in the root environment and thus able to enhance water and nutrient use efficiency. Zeolite possess unique characteristics of high cation exchange capacity, large internal porosity, uniform particle size distribution, and reduces the effect of stress on the crop (Hazrati et al., 2017). Its application improved soil nutrients and soil water content in various soil types and various crops, i.e. rice, Aloe vera, amaranth, sunflower and dragonhead (Hazrati et al., 2017; Karimzadeh Asl and Hatami, 2019; Karami et al., 2019). Thus, zeolite application leads to soil improvement. However, very little literature is available regarding zeolite performance in divergent crop and soil types in India. Thus, this study was taken up to study the impact of zeolite application on soil nutrient, water and crop performance in rainfed Alfisols. Methodology Pot experiment was carried at CRIDA, Hyderabad with maize as test crop with different levels of zeolite (0, 50,100 & 200 kg ha -1 ) in combination with different fertilizer dose (control, 50% RDF & 100% RDF) at two different moisture levels (50% and 100% Field capacity). The experimental design was completely randomized block design with three replications. The soil used in the study was collected from Hayathnagar Research Farm (HRF), CRIDA, Hyderabad. The maize hybrid studied was DHM-117. The soils collected were sieved through 2 mm sieve and was mixed with zeolite and fertilizers as per the treatments and after mixing of zeolite, the pot is filled with soil @ 10 kg pot -1 . At the end of the maturity stage, cob from each plant from pot was harvested. Grains were separated from the cobs and grain yield was calculated. The post-harvest soil samples were also collected and analyzed for SOC, and available macro (N, P, K) and micro nutrients (Zn, Fe, Mn and Cu) as per standard procedure. Also, details of water added to the crop was collected to calculate the water use efficiency (WUE). Results The two most important factors that affects the maize production is nitrogen and moisture content. The grain yield of maize ranged from 17.99 to 52.15 g pot -1 . The grain yield of maize was significantly improved by application of different combinations of recommended dose of fertilizers and zeolite levels. The lowest grain yield was observed in control (17.99 g pot -1 ). Increasing the zeolite dose have significantly improved N uptake from 169.39 mg pot -1 to 261.43 mg pot -1 and nitrogen levels also significantly improved N uptake. Similarly, zeolite application has significantly improved K uptake from 198.75 mg pot -1 to 299.14 mg pot -1 . Also, zeolite addition improved soil available N by 20.3% and 27% at 50% and 100% Field capacity respectively and soil available K by 27% and 34.4% under 50% and 100% Field capacity, respectively. Resource conservation and rainfed agriculture 576 | Page
International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad Conclusion The results from this preliminary research showed that zeolite application along with fertilizers improved crop production and soil chemical properties. There was significant difference in N and K uptake with higher dose of zeolite application (100 & 200 kg ha -1 ) as compared to control at both the moisture levels. However, further investigations need to be carried to study the effect of zeolite application in different soil types at field conditions. References Hazrati, S., Tahmasebi-Sarvestani, Z., Mokhtassi-Bidgoli, A., Modarres-Sanavy, S. A. M., Mohammadi, H. and Nicola, S. 2017. Effects of zeolite and water stress on growth, yield and chemical compositions of Aloe vera L. Agric. Water Manag. 181:66-72. Karimzadeh Asl, K. and Hatami, M. 2019. Application of zeolite and bacterial fertilizers modulates physiological performance and essential oil production in dragonhead under different irrigation regimes. Acta Physiol. Plant. 41(1):1-20. Karami, S., Hadi, H., Tajbaksh, M. and Modarres-Sanavy, S. A. M. 2020. Effect of zeolite on nitrogen use efficiency and physiological and biomass traits of amaranth (Amaranthus hypochondriacus) under water-deficit stress conditions. J. Soil Sci. 20(3):1427-1441. T4a-06R-1227 Effect of Conservation Agriculture and balanced nutrition on System Productivity, Profitability and Mitigating GHGs Emission in Maize- Horsegram Sequence in Rainfed Alfisols Sumanta Kundu 1* , Ch. Srinivasarao 1 , R. B. Mallick 2 , K. Sammi Reddy 1 , V. K. Singh 1 , J. V. N. S. Prasad 1 , A. K. Indoria 1 , G. Pratibha 1 , V. Girija Veni 1 , Pravin B. Thakur 1 , T. Satyanarayana 3 , Kaushik Majumdar 3 and B. Venkateshwarlu 1 1 ICAR-Central Research Institute for Dryland Agriculture, Santoshnagar, Hyderabad, 500 059, India 2 Institute of Agricultural Sciences, Calcutta University, West Bengal, India 3 International Plant Nutrition Institute, Gurgaon, India * Sumanta.K@icar.gov.in Land degradation, low soil fertility, erratic rainfall are the prime constraints for low agricultural production in the semi-arid region. In Alfisols regions of southern India, most of the cultivated areas produce a single crop in rainy (Kharif) season and 25-30% rainfall goes unutilized in post rainy (Rabi) season which remains fallow. In these areas, drought hardy crop like horsegram can be cultivated in sequence of Kharif crop by practicing effective soil moisture conservation measures or conservation agriculture (CA). CA can play a major role in stabilizing production in rainfed regions by mitigating water and nutrient stress through 577 | Page Resource conservation and rainfed agriculture
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Extended Summaries 22-24 December,
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Citation Rama Rao, C.A., Srinivasa
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Resilience through land and water m
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International Conference on Reimagi
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Theme- 2 Ecosystem based approaches
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Theme- 6 Institutional and policy i
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