Nutrient accumulation in aman rice as influenced by integrated use of manures and fertilizers

Nutrient accumulation in aman rice as influenced by integrated use of manures and fertilizers

The present study was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during Aman season of 2012. There were altogether six treatments viz. To: Control, T1: STBCF (HYG), T2: Cowdung 5 t ha-1 + STB-CF (HYG), T3: Poultry manure 3 t ha-1 + STB-CF (HYG), T4: Compost 5 t ha-1 + STB-CF (HYG), T5: Farmer’s practice (FP). The experiment was laid out in a Randomized Complete Block Design (RCBD) with four replications. The results revealed that nitrogen, phosphorus, potassium and sulphur contents in grain and straw of BRRI dhan49 were significantly influenced due to the application of manures and fertilizers. The maximum N content in grain of 1.288% was observed in T3 and that in straw of 0.776 was also in T3. P and K contents in grain were the highest in T4 and that in straw was observed in T3. S content in grain (0.077%) was the maximum T3 and that in straw (0.055%) was found in T5. The minimum concentration of NPKS was found in control. The nutrient uptake by grain and straw of BRRI dhan49 was also enhanced due to application of cowdung, poultry manure, compost and fertilizers. N P and S uptake was the highest in T3. K uptake by grain and straw was the highest in T4 and T1, respectively. The lowest value for NPKS uptake was observed in To: Control.

Key words: Nutrient, grain, straw, rice.

Introduction
An urgent need of the crop sector of Bangladesh Agriculture is to produce more food to feed the country’s over growing population. To attain self-sufficiency in food, efforts need to be made to enhance the yield per unit area and improve the quality of the produce. Because of quality foods i.e. nutrient enriched foods ensure the sound life of human. Rice (Oryza sativa L) is the leading cereal crop in the world and staple food crop in Bangladesh. So, nutrient enrichment in rice will make sure the healthy Bangladesh. High yield goal with nutrient enrichment demands more inputs, particularly fertilizer nutrients but raising productivity through chemical fertilizer nutrients is likely to have harmful effect on the environment, soil, water and climate. So, a suitable combination of organic and inorganic sources of nutrients is necessary for sustainable agriculture that will provide food with good quality. Mannan et al. (2000) found out that manuring with cowdung up to 10 t ha-1 in addition to recommended inorganic fertilizers with N application improved grain and straw yields and qualities of transplant rice over inorganic fertilizers alone. Continuous application of FYM increased the pH, available phosphorus content and gas phase of the soil,