Liming and manganese influence on common bean yield, nutrient uptake, and changes in soil chemical properties of an oxisol under no-tillage system

摘要

Liming is an essential practice in improving yields of annual crops grown on acid soils and deficiency of micronutrients including manganese (Mn) is increasing in crop plants in recent years. A field experiment was conducted during three consecutive years to determine response of common bean to liming and manganese fertilization. The liming rates used were 0, 12, and 24 Mg ha(-1) and Mn rates were 0, 10, 20, 40, 80, and 160 kg ha(-1). Liming significantly influenced grain yield of common bean. The increase in shoot dry weight and pod number were responsible for 44 and 34% variation in bean yield, respectively. Liming significantly influenced soil chemical properties in the top (0-10 cm) as well as in the sub (10-20 cm) soil layer in favor of higher bean yield. Application of Mn did not influence yield of bean and soil chemical properties were also not influenced significantly by Mn application. Average soil chemical properties across two soil layers (0-10 and 10-20 cm) for maximum bean yield were pH 6.8, calcium (Ca) 4.7 cmolc kg(-1), magnesium (Mg) 2.1 cmolc kg(-1), hydrogen (H)+aluminum (Al) 3.4 cmolc kg(-1) , acidity saturation 25.9%, cation exchange capacity (CEC) 8.3 cmolc kg(-1), base saturation 70.9 %, Ca saturation 50.6 %, Mg saturation 20.6 %, potassium (K) saturation 2.2, Ca/Mg ratio 2.8, Ca/K ratio 22.1, and Mg/K ratio 8.2.