Long-Term Effect of Integrated Nutrient Management of Properties of Typic Ustochrept After 23 Cycles of an Irrigated Rice (Oryza sativaL.) – Wheat (Triticum aestivumL.) System

Abstract

under a rice-wheat system was conducted to study the long-term effect of integrated nutrient management (INM) on physicochemical and microbiological properties of soil after 23 cycles of a rice-wheat cropping system. The experiment comprised 14 treatment combinations viz., N, P and K fertilizer application as individual component and use of chemical fertilizers in conjunction with different organic sources to substitute 25% to 50% N through farm yard manure (FYM), wheat cut straw (WCS), and green manure (GM) with Sesbania aculeata. The experimental treatments were replicated three times. GM, WCS, and FYM improved the physical properties of soil like water-holding capacity, penetration resistance, and bulk density. The integrated nutrient management technique resulted in a positive influx of nutrients by increasing organic carbon content, available nitrogen, phosphorus, and potassium varying from 0.390 to 0.543%, 171.7 to 219.3 kg ha −1 , 20.5 to 43.3 kg ha −1 , and 124.6 to 148.9 kg ha −1 , respectively. Also, Cu, Fe, and Mn content showed significant improvement in the soil with the addition of FYM, WCS, and GM. These three organic sources of nutrition along with chemical fertilizers helped to improve infiltration rate, available soil moisture, labile C, and microbial count. However, there was a decrease in bulk density, soil strength, pH, and EC of soil with the application of FYM, WCS, 724 Nutrient Management Properties of Ustochrept 725and GM in conjunction with chemical fertilizers as compared with chemical fertilizer application alone.

Effect of INM on Soil Carbon Pools, Soil Quality and Sustainability in Rice-Brown Sarson Cropping System of Kashmir Valley

“…The application of FYM increased Olsen-P because of its P content, and possibly by increasing retention of P in soil. These results were similar to the results reported by Ayoola and Titilola (2006), Walia et al, (2010), Moharana et al, (2012), Datt et al, (2013), Tadesse et al, (2013).…”

“…The bulk density of soil increased with depth 15 to 30 cm, varying from 1.18 to 1.30 g cm -3 in all the treatments. These results are similar to those reported by Walia et al, (2010), Nayak et al, (2012), Datt et al, (2013), Tadesse et al, (2013).…”

“…Increased in organic matter content which resulted in the improvement in stable soil aggregates and macro and micro pore spaces resulted in an increase in free movement of water within the soil that might have increased the available water content of the soil. Similar results were also reported by Walia et al, (2010) and Tedesse et al, (2013). A similar experiment on sorghum crop in the north-eastern part of the country demonstrated that the soil water content was significantly improved with FYM application than the control (Bayu et al, 2006).…”

“…This might be due to higher organic carbon content observed in surface as com-pared to sub-surface soil. The results are corroborated with the findings of Walia et al, (2010), Moharana et al, (2012), Datt et al, (2013 The NPK dose was applied through urea, DAP and MOP. FYM and rice straw applied were 36.6 and 46% total carbon.…”

“…Considerable build-up of K under FYM + NPK and rice straw treatment in a long-term fertilizer experiment was reported by others . The significant buildup of available K with the application of organic manures was also reported by others (Ayoola and Titilola, 2006;Walia et al, 2010;Katkar et al, 2011;Moharana et al, 2012;Datt et al, 2013).…”