Effects of Cotton Oil Cake with Recommended Fertilizer Dose on Nutrient Uptake, Yield Contributing Characters, and Yield of BRRI dhan29 Rice

Abstract

Nowadays, organic manures are traditionally used as a fertilizer for farming to get high quality at low cost. Similarly, cotton oilcake is a superior organic manure that has been boosted with vital nutrients. A research was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh throughout Boro season of 2024 to study the effects of cotton oil cake with recommended fertilizer dose on rice. The research was set up using a Randomized Complete Block Design (RCBD) with 3 replicates. There were seven treatments such as T1: Control, T2: Recommended Fertilizer Dose (RFD), T3: 90% of RFD + 10% of Cotton Oil Cake (COC), T4: 80% of RFD + 20% of COC, T5: 70% of RFD + 30% of COC, T6: 60% of RFD + 40% of COC and T7: 50% of RFD + 50% of COC. The grain, straw, and biological yield of BRRI dhan29 were all substantially impacted by the various treatments. The maximum grain yield of 5.21 t ha–1 was recorded for the treatment T2 which was statistically identical to those recorded for the treatments T5 (5.10 t ha–1), T6 (5.13 t ha–1), and T7 (5.18 t ha–1). The maximal features of nutrient concentration in grain and straw, as well as absorption by grain, straw, and overall were likewise greater for treatment T2, whereas T5 produced substantially equivalent findings. Plant length, active tillers hill–1, panicle length, filled grains panicle–1, unfilled grains panicle-1 and 1000-grain weight were also greater for the treatment T2. Grain yield enhanced with raising nutrient absorption through BRRI dhan29. The implementation of treatment T5 suggestively influenced the yield contributing characters, nutrient content and nutrient absorption through grain and straw of BRRI dhan29 but remained statistically similar to that of the results revealed due to the treatment T2. The findings discovered obviously showed that in order to enhance the crop yield and maintain soil good health, treatments T5 may be practiced instead of treatments T2. Consequently, bearing in mind the importance of organic manures and sustain soil good health, cotton oilcake should be regarded for implementation in combination with chemical fertilizers for yield enlargement of rice.