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Effect of Organic Manures and Mineral Fertilizers on Soil Properties and Yield of Sweet Pepper (Capsicum annuum L.)

Aims: Under the intensive agriculture system, it is crucial to maintain the soil fertility for the sustainability of crop production. Therefore, the study was conducted in the experimental field of the Department of Soil Science of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur to investigate the effect of different manures in combination with synthetic inorganic fertilizers on growth, yield and yield contributing characters of BARI Mistimorich 1 (Capsicum annuum L.), a variety of sweet pepper. Nutrient content of capsicum and soil fertility status were also assessed. 
Materials and Methods: The field trial was established following a randomized complete block design (RCBD) having four replicates. Treatments of the field trial included T1= 100% recommended dose of chemical fertilizers (RDCF), T2= 10t/ha cowdung (CD) + IPNS based chemical fertilizers (CF), T3=10t/ha poultry manure (PM) + IPNS based chemical fertilizers (CF) and T4= 10t/ha vermicompost (VC) + IPNS based chemical fertilizers (CF). 
Results: Experimental results reveal that application of organic manures in combination with chemical fertilizers produced significantly higher plant height, plant weight, number of branches per plant, number of flowers per plant, number of fruits per plant, fruit weight, fruit length, fruit diameter, total yield and nutrient content and uptake in sweet pepper. Organic manures (CD, PM and VC) in combination with chemical fertilizers ensured higher nutrient uptake when compared with the sole application of inorganic fertilizers. Among the treatments, vermicompost treated plots gave the higher yield of sweet pepper and improved the post-harvest soil nutrient status. 
Conclusion: Vermicompost was found to be suitable as substitute of other organic manures for the production of capsicum.