Impact of Biochar, Organic Manures and Inorganic Fertilizers on Nutrient Uptake and Yield in Rice Crop

A field experiment was conducted at Agricultural college Farm, Bapatla during 2023-2024 to study the effect of biochar, organic manures and inorganic fertilizers on nutrient uptake and yield of rice crop. The experiment was laid out in randomized block design with eight treatments and three replications. The treatments consist of 100% RDF in combination with organic manures (poultry manure, green leaf manure and FYM) and biochar. Data on N, P and K uptake by grain and straw at harvest and grain and straw yield were recorded. Results revealed that the rice grain and straw yield (kg ha-1) was maximum in treatment T5 i.e.,100% RDF + poultry manure @ 5 t ha−1 (6041) and minimum in control T1 - 100% RDF (5013). The rice grain N and P uptake was maximum in T5 (74.25, 40.56 kg ha-1 in 2023 and 76.48, 42.56 in 2024), and minimum in T1 (48.45, 27.24 kg ha-1 in 2023 and 52.24, 30.78 in 2024), respectively. Similarly, rice straw N and P uptake was maximum in T5 (76.48, 25.40 kg ha-1 in 2023 and 78.83, 29.93 in 2024) and minimum in T1 (49.29, 15.98 kg ha-1 in 2023 and 51.62, 18.35 in 2024), respectively. Finally, it can be recommended that rice grain and straw yield was maximum in combined application of both inorganic and organic sources of nutrients compared to inorganic fertilizers alone.