Effect of integrated use of organic manures with chemical fertilizers in the rice-rice cropping system and its impact on soil health

Abstract

A field experiment was conducted during [2003][2004] at Bangladesh Agricultural University farm, Mymensingh to evaluate the suitability of different sources of organic materials for integrated use with chemical fertilizers for the BoroFallow-T. Aman rice cropping pattern. The experiment was set up in a randomized complete block design (RCBD) with three replications. Eighttreatments, formulated from organic manure and chemical fertilizers have been imposed. The treatment combinations are T 1 : control, T 2 : 70% NPKS, T 3 : 100% NPKS, T 4 : 70% NPKS + rice straw (RS) @ 5 t/ha, T 5 : 70% NPKS + dhaincha (DH) @ 15 t/ha, T b : 70% NPKS + mungbean residue (MBR) @ 10 t/ha, T 7 : 70% NPKS + cowdung (CD) @ 5 t/ha and T 8 : 70% NPKS + poultry manure (PM) @ 3 t/ha. Organic manure or crop residue was applied to T. Aman rice and their residual effects were observed in the following Boro rice. Application of 70% NPKS + PM produced the highest grain yield of T. Aman rice, which was identical to that obtained with 100% NPKS with no manure. In Boro season. application of 100% NPKS produced the highest grain yield of 6.87 t/ha, which was identical with the application of 70% NPKS + PM (6.57 t/ha). The total grain yield in the cropping pattern ranged from 5.14 t/ha in T 1 (control) treatment to 12.29 t/ha in the 100% NPKS. The application of 3 t/ha PM with 70% NPKS (T 8 ) produced the total yield of 12.09 t/ha followed by 11.59 t/ha in the treatment containing 10 t/ha MBR plus 70% NPKS (T 6 ). It appears that the application of 3 t/ha PM once in a year with 70% NPKS can reduce the use of 30% NPKS as fertilizers. There were negative balances for N and K with the highest mining of K, while the balances for P and S were positive. The economic analysis reveals that most of the treatments produced BCR (benefitcost ratio) of more than 3.0 showing that they all are economically viable. The integrated use of fertilizers and manure resulted in considerable improvement in soil health by increasing organic matter, available P, and S contents of soils. The overall findings of the study indicate that the integrated use of chemical fertilizer and manure is important for sustainable crop yield in a rice-rice cropping pattern.

Effect of integrated nutrient management on nutrient uptake and sustainable grain yield in transplanted aman rice

“…Azim (1999) and Hoque (1999) reported that application of S from manure and fertilizers increased S content both in grain and straw. Ali et al (2009) also reported the similar results.…”

Integrated Effects of Poultry Manure and Chemical Fertilizer on Yield, Nutrient Balance and Economics of Wetland Rice Culture

“…Phosphorous balance was positive in all poultry manure treated plots irrespective of chemical source. These results were similar with the findings of some earlier works (Hossain et al, 2010 ;Ali et al, 2009). Table 3.…”

Effects of Farmyard Manure and Inorganic Fertilizer Application on Soil Physico-Chemical Properties and Nutrient Balance in Rain-Fed Lowland Rice Ecosystem

“…The increase in soil N and P after FYM application might be due to the direct addition of N and P through decomposition of the FYM added to the soil. The improvement in the soil available P with FYM addition could be attributed to many factors, such as the addition of P through FYM, and retardation of soil P fixation by organic anions formed during FYM decomposition [16]. Many authors associated the soil nutrient improvement role of FYM to a residual effect on succeeding crops.…”