Effect of Liming on Soil Properties, Nutrient Content and Yield of Wetland Rice in Acid Tropical Soils of Kerala

Abstract

The acid tropical soils of Kerala are characterized with low levels of basic cations and high levels of acidic cations like iron and manganese. Rice grown under flooded conditions are associated with high concentration of iron in the rhizosphere due to reduced soil environment. Higher iron content in the rhizosphere has antagonistic effect on uptake of essential nutrients leading to reduction of yield. An experiment was conducted in the first crop season of 2015 to study the influence of lime application on soil properties, plant nutrient content and yield of rice. The treatments included three sources of lime viz. calcium oxide, calcium carbonate and dolomite applied in three doses viz. as per POP recommendation, as per ΔpH and as per lime requirement based on SMP buffer method and a control with no lime application. Application of calcium carbonate as per lime requirement based on SMP buffer method increased the soil pH from 4.90 to 7.10 at harvest of the crop when compared to 4.85 in the control plot. Lime applied as per lime requirement based on SMP buffer method increased the availability of potassium, calcium, sulphur and reduced the levels of available iron, manganese, copper and zinc. Content of potassium, calcium and sulphur in plant increased with dose of lime applied while the plant content of magnesium, iron, manganese, zinc and copper decreased. Application of dolomite increased the available magnesium in soil and the magnesium content in plant. Dolomite applied as per ΔpH was found to be the optimum dose in increasing the yield of rice.

Effect of Soil Acidity Amelioration on Soil Properties and Yield of French Bean (Phaseolus vulgaris L.) under Rainfed Condition in Arunachal Pradesh

“…Soil pH recorded maximum in 75% RDF+lime (5.21) followed by 50% RDF+lime, 75% RDF+Vc, 50% RDF+Vc, and 100% RDF and minimum in control at both soil depths. From control to 75% RDF+limesoil pH increasedby 3.78% and 3.57% at 0-15 and 15-30 cm soil depth due tothe neutralization of H + by lime (Dahal et al, 2019, Bhindhu et al, 2018, Bekele et al, 2018 and hydrolysis reaction of fertilizer (Curtin et al, 2020) and ion uptake by plants (Purbasha et al, 2017). The contemporary report revealed application of lime to acid soils increased Ca 2+ and/or Mg 2+ ions and reduced Al 3+ , H + , Mn 2+ , and Fe 2+ ions in the soil solution (Kisinyo et al, 2014, Vaide et al, 2011.…”

“…Across the globe, reports show acid soil amelioration with vermicompost improved soil fertility because of the formation of soil Fe/Al-organic complex which reduced metal ion activity and toxicity Kleber, 2015, Sharma et al, 2018). Basic cations become low or unavailable to crops in acid soil and lime application makes it available for crop uptake at the time of plant growth metabolism (Dahal et al, 2019, Bhindhu et al, 2018, Behera and Shukla, 2015 and increase crop yield in acid soils (Barman et al, 2014). Both vermicompost and lime play different roles in improving the soil's chemical and physical properties in acid soil (Ray et al, 2021, Bekele et al, 2018.…”