Effect of Different Nutrient Management Practices on Kharif Rice Yield, Nutrient Uptake and Soil Properties in Telangana
Ch.Ramulu *
Department of Soil Science and Agricultural Chemistry, Regional Agricultural Research Station, Warangal-506 007, PJTSAU, Telangana, India.
R.Shravan Kumar
Department of Entomology, RARS, Warangal, India.
G. Padmaja
Department of Pathology, RARS, Warangal, India.
R.Uma Reddy
Department of Soil Science and Agricultural Chemistry, Regional Agricultural Research Station, Warangal-506 007, PJTSAU, Telangana, India.
*Author to whom correspondence should be addressed.
Abstract
The field experiment was conducted during kharif-2019, 2020 and 2021in RARS Warangal, located at 180 01.077 N latitude 790 36.197 E longitude and an altitude of 259 m above mean sea level to study the effect of different nutrient management practices on rice yield, nutrient uptake and soil properties in Telangana. The experiment was laid out in completely randomized block design with 5 treatments (T1 = Organic Farming, T2 = Chemical farming, T3 = Integrated Nutrient Management (INM), T4 = Control and T5 = Natural farming) replicated in four times. Rice (WGL-32100) was sown during third week of July, transplanted in third week of August and harvested at 135 days after sowing. The results indicated that, significantly higher grain yield (5357 kg ha-1) was recorded in INM over control (3632 kg ha-1), natural farming (3986 kg ha-1) and organic farming (4843 kg ha-1) but at par with chemical farming (5164 kg ha-1). Significantly higher straw yield (6428 kg ha-1) was recorded in INM over control (4326 kg ha-1), natural farming (5100 kg ha-1), organic farming (5668 kg ha-1) and chemical farming (5856 kg ha-1). Significantly higher nitrogen uptake (87.42 kg ha-1) was recorded in INM over control (56.58 kg ha-1), natural farming (67.58 kg ha-1) and organic farming (75.39 kg ha-1) but at par with chemical farming (81.46 kg ha-1). Significantly higher phosphorus uptake (27.34 kg ha-1) was recorded in INM over control (17.80 kg ha-1) and natural farming (19.76 kg ha-1) but at par with organic farming (25.52 kg ha-1) and chemical farming (25.86 kg ha-1). Significantly higher potassium uptake (96.66 kg ha-1) was recorded in INM over control (56.31 kg ha-1), natural farming (68.20 kg ha-1) and organic farming (81.27 kg ha-1) but at par with chemical farming (89.29 kg ha-1). The maximum increase in the OC, available N, P2O5 and K2O were noted in INM (6.9 g kg-1, 186, 45 and 296 kg ha-1, respectively). The lowest value of OC, available N, P2O5 and K2O were noted in control (4.1 g kg-1, 58, 18 and 201 kg ha-1, respectively).
Keywords: Organic farming, chemical farming, natural farming