Abstract
Soil acidity is a major problem when it comes to improving crop productivity and nutrient uptake. This experiment was therefore conducted at a farmer’s field—Nalitabari Upazila under AEZ 22 (northern and eastern Piedmont plains) to evaluate the effects of lime and organic manure (OM) amendment on crop productivity and nutrient uptake of the wheat–mungbean–T. Aman cropping pattern in acidic soils of northern and eastern Piedmont plains. The experiment was laid out in a randomized complete block design with three replications. There were nine treatments applied, varying doses of lime (dololime at the rate of 1 and 2 t ha−1), OM (cow dung at the rate of 5 t ha−1, poultry manure at the rate of 3 t ha−1) and a lime–OM combination to the first crop; T. Aman and its residual effects were evaluated in the succeeding second crop, wheat, and the third crop, mungbean. Results demonstrate that application of lime and organic manure to soil had significant effects on the first crop. However, the effects of lime and organic manure were more pronounced in the second and third crops. The increase in grain yield over control ranged from 0.24 to 13.44% in BINA dhan7. However, it varied from 10.14 to 54.38% in BARI Gom30 and 40 to 161.67% in BARI Mung6. The straw yields of the crops also followed a similar trend. The N, P, K, and S uptake by grain and straw of T. Aman, wheat, and mungbean were influenced significantly by the combined application of lime and organic manure. Sole or combined application of lime and manure amendment significantly improved nutrient availability and soil quality. Therefore, application of lime in combination with manure can be practiced for uplifting the crop productivity and improving soil quality in acidic Piedmont soils of northern and eastern Piedmont plains.
Highlights
Acidic soils have toxic concentrations of A13+, Fe3+, and Mn2+, lower concentrations of P, and low availability of bases, which cause reduction in crop yield [1,2,3]
The grain yield of first crop (Binadhan 7) responded significantly to the application of dololime, cow dung, and poultry manure, there was a little difference in grain yield among the treatments (p < 0.05) (Table 2)
The increase in grain yield over the control ranged from 0.24 to 13.44% where the highest increase was obtained in T7 (13.44%) and the lowest one was obtained in T6 (0.24%)
Summary
Acidic soils have toxic concentrations of A13+, Fe3+, and Mn2+, lower concentrations of P, and low availability of bases, which cause reduction in crop yield [1,2,3]. Legumes are highly affected due to soil acidity. Lime improves soil quality, such as soil pH, P availability, cation exchange capacity (CEC), and base saturation, while lowering Al concentrations [6]. Liming increases soil pH and changes soil properties, such as pH, OM, and some plant nutrient availability, which is beneficial to sustain high yield [8]. Because liming enhances microbial activity, it frequently promotes the mineralization of agricultural wastes and organic manure in the soil [10], which can improve soil accessible plant nutrients, P. Rahman et al [14] conducted field trials with a wheat-rice cropping pattern and found that applying 2.4 t lime ha−1 boosted crop yields adequately
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