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Plant Nutrient Status of Nerica 10 Under Integrated Fertilizer Management

Md. Kashedul
Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

H. Mehraj
The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarami, Matsumaya, Ehime 790-8556, Japan

S. Shahriar
Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

A.S.M. Fazle Bari
Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

Mst. Sharmin Sultana
Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted to assess the effect of integrated nutrient management on plant nutrient content of NERICA 10 during Aus season (Mid March-July), 2012. Eleven treatments coded from T₁ to T₁₁ were used in the experiment. N, P, K, S content in grain and straw and their uptake by grain and straw of NERICA 10 showed significant variation among the treatments. In post harvest soils, the contents of total nitrogen, available phosphorus, exchangeable potassium and available sulphur increased due to application of cowdung and vermicompost compared to initial soil. In the contrary, soil pH value decreased slightly as compared to that of initial soil. The overall results indicate that 100 kg N from urea along with 20 kg N from vermicompost was the best treatment in producing higher rice yield with sustenance of soil fertility.

Keywords: Rice, Organic and inorganic fertilizers, NPKS content

Location: Sher-e-Bangla Agricultural University Farm, Dhaka, Bangladesh

Start Date: 15-03-2012

End Date: 15-07-2012

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To assess the effect of integrated nutrient management on plant nutrient content of NERICA 10 during Aus season

Methodology:

Location of the study and period: The experiment was conducted in the Sher-e-Bangla Agricultural University Farm, Dhaka, Bangladesh in Aus season (Mid March-July) of 2012. NERICA 10 cultivar was used in the experiment. Treatments of the experiment: Eleven different fertilizer combinations viz., T₁: No chemical fertilizer and organic manure (Control); T₂: 100% recommended N (120 kg nitrogen ha^-1); T₃: 100 kg N from urea + 20 kg N substituted by vermicompost; T₄: 100 kg N from urea + 20 kg N substituted by cowdung; T₅: 80 kg N from urea + 40 kg N substituted by vermicompost; T₆: 80 kg N from urea + 40 kg N substituted by cowdung; T₇: 60 kg N from urea + 60 kg N substituted by vermicompost; T₈: 60 kg N from urea + 60 kg N substituted by cowdung; T₉: 40 kg N from urea + 80 kg N substituted by vermicompost; T₁₀: 40 kg N from urea + 80 kg N substituted by cowdung; T11: 100% N substituted by equal portion of vermicompost were used in the experiment as treatment. Urea contained 46% N, Cowdung contain 1% N and Vermicompost contain 2.1% N. Application of fertilizers: The amounts of nitrogen, phosphorus, potassium and sulfur fertilizers required per plot were calculated from fertilizers rate per hectare. TSP, MP and Gypsum were applied @ 80, 120, 55 kg/ha respectively during final land preparation. Nitrogen was also applied as per treatment in the form of urea in three equal splits. Experimental design: Experiment was conducted using Randomized Complete Block with three replications. The unit plot size was 3.5 m ×2 m, block to block distance was 2 m and plot to plot distance was 1 m. Collection and preparation of initial soil sample: The initial soil samples were collected before land preparation from a 0-15 cm soil depth. Chemical analysis of soil samples: Soil samples were analyzed for both physical and chemical properties in the laboratory of Soil Resource Development Institute (SRDI), Farmgate, Dhaka. The properties studied included soil texture, pH, organic matter, total N, available P, exchangeable K and available S. Particle size analysis:Particle size analysis of soil was done.Soil pH: Soil pH was measured with the help of a Glass electrode pH meter using soil and water at the ratio of 1:2.5 Organic carbon: Organic carbon in soil was determined by Wet Oxidation Method where the principle was to oxidize organic carbon with an excess of 1N K₂Cr₂O₇ in presence of concentration of H₂SO₄ and to titrate the residual K₂Cr₂O₇ solution with 1N FeSO₄ solution. Total nitrogen, Available phosphorus, Exchangeable potassium, Available sulphur in soil was determined. Chemical analysis of plant samples:Preparation of plant samples, Digestion of plant samples with sulphuric acid, Digestion of plant samples with nitric-perchloric acid mixture were done. Statistical Analysis: The statistical analysis for different character including the nutrient content and uptake were done following the ANOVA technique and the mean results in case of significant F-values were adjusted by the Duncan’s Multiple Range Test.

Source of Information: Sci. Agri. 11 (3), : 145-150, 2015

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Among the organic sources, vermicompost performed the best in recording yield and yield attributing characters as well as NPKS content and uptake by NERICA-10. Cowdung and vermicompost alone or with the combination of nitrogenous fertilizer insignificantly decreased (slight) soil pH than in initial soil. Nitrogen, Phosphorus and Sulphur content in rice grain was higher than the rice straw. Potassium content in rice straw was about 6-8 times higher than rice grain. Organic manuring slightly increased total N, available P and S and exchangeable K in post harvest soil compared to initial soil. Increasing trend in cowdung and vermicompost content was observed in soil where organic manures were applied.

Knowledge Management: Journal