Effect Of Organic Manure And Inorganic Fertilizers On Growth, Yield And Nutrient Uptake Of Rice (Oryza Sativa L.)

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Rice (Oryza sativa) is a vital staple crop that plays a crucial role in global food security. To meet the increasing demand for rice production, farmers often utilize a combination of organic manure and inorganic fertilizers. This research investigated that the field experiment was laid out in Randomized Block Design with eleven treatments and replicated thrice. The rice variety PB-1509 was transplanted in puddle soil. The important findings are the plant height in (cm), Number of tillers, Dry matter accumulation of rice and leaf area index of rice 30, 60, 90 DAT at harvest stage was investigated in Treatment T11 (100% NPK + FYM + S + Zn) given the highest. The yield attributes like panicle length (cm), panicle weight (g), number of grain per panicle, grain weight per panicle and 1000 seed weight (g) was investigated in T11 (100% NPK + FYM + S + Zn) given the highest. The grain yield varied from 23.49 - 43.38 q ha-1, Straw yield varied from 32.42 - 57.24 q ha-1, the biological yield varied from 55.91 - 100.62 q ha-1, the harvest index varied from 42.01 - 43.95 % and the maximum protein content in rice grain was recorded in the treatment combination T11 (100% NPK + FYM + S + Zn) gave the highest. The nitrogen content in grain ranged from 1.13 – 1.22 %, P content from 0.22 - 0.26 %, K from 0.31 – 0.41 %, sulphur content varied from 0.07- 0.19 kg ha-1 and Zinc varied from 15.35 - 22.37 ppm. The minimum and maximum was observed in the T1 [Control] and T11 (100% NPK + FYM + S + Zn), respectively. The uptake values of nutrients in grain and straw increased due to concentration of these nutrients and biological yield of grain and straw. It was recorded that N uptake 26.54 – 52.92 kg ha-1, P from 5.17 – 11.28 kg ha-1, K from 7.28 - 17.79 kg ha-1, S from 1.64 – 8.24 kg ha-1 and Zn from 36.06 – 97.04 g ha-1 in T11 (100% NPK + FYM + S + Zn). Studies have shown that the combined application of organic manure and inorganic fertilizers produces synergistic effects on rice growth and yield. The organic manure enhances soil structure, moisture retention, and microbial activity, thereby promoting root development and nutrient uptake. Inorganic fertilizers supplement these benefits by providing immediate nutrient availability to support vigorous vegetative growth, improved tillering, and increased grain formation. The combined application of organic manure and inorganic fertilizers offers substantial benefits for rice cultivation.