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Effect of Different Fertilizer Management on Soil Properties and Yield of Fine Rice Cultivar

M. R. Islam
Department of Crop Physiology and EcologyHajee Mohammad Danesh Science and Technology University, Dinajpur

S. Sikder
Department of Crop Physiology and EcologyHajee Mohammad Danesh Science and Technology University, Dinajpur

M. M. Bahadur
Department of Crop Physiology and EcologyHajee Mohammad Danesh Science and Technology University, Dinajpur

M. H. R. Hafiz
Department of Crop Physiology and EcologyHajee Mohammad Danesh Science and Technology University, Dinajpur

Abstract/ Executive Summary:

The experiment was conducted at the Research Farm of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur during 14 August to 7 December, 2008 to study the effect of (different organic and inorganic) fertilizer management on soil properties and yield of five fine rice cultivars viz., Rajshahi swarna, Silkumul, Kataribhog, Lal pajam and Sanla. The experiment was laid out in a split plot design with three replications. For post harvest soil, bulk density and pH gradually decreased in organic fertilizer management compared to inorganic fertilizer management. But percent organic carbon (0.68 to 0.80%) and organic matter (1.19 to 1.37%) of soil increased in organic management compared to inorganic management (0.53 to 0.66% and 0.91 to 1.14%, respectively). All the cultivars gave some-what better yield under inorganic management where the yield variation was minimum between organic and inorganic management. Conversely, organic culture had beneficial effects in improving soil properties and the sustainable agriculture mostly depends on soil organic matter. This organic matter will remain stable by using organic fertilizer.

Keywords: Bulk density, Organic and inorganic culture, Fine rice, Soil pH

Location: Research Farm of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur

Start Date: 14-08-2008

End Date: 07-12-2008

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

1. To find out the effect of different fertilizer management on soil properties in fine rice cultivars.

Methodology:

The experiment was laid out in a split plot design with three replications. The unit plot size was 6 m² (3m x 2m) having a plot to plot and block to block distance of 0.75 m and 1.0 m, respectively . There were 30 plots in the experiment. The treatment factors A and B were: A. Main plot treatment: Two cultural conditions- Organic and Inorganic culture; B. Sub plot treatment: Five fine rice cultivars-Rajshahi swarna, Silkumul, Kataribhog, Lal pajam and Sanla. In inorganic culture a fertilizer dose of 90-75-60-60- 10 kg ha^-1 were applied in the form of Urea, TSP, MP, Gypsum, and Zinc oxide which supplied N, P₂0₅, K₂O, S, and Zn respectively. Under organic culture organic fertilizer of Northern Agro Services Ltd. (NASL) was used at the dose 2 t ha^-1 to fulfill the nutrient requirements. Thirty six days old seedlings were uprooted carefully from the seedbed in the morning and transplanted on 14th August 2008 in the main plot. Other intercultural operations were done as per requirement. The initial and post harvest soil samples were analyzed in Soil Resources Development Institute (SRDI) for determining the soil bulk density, pH, organic carbon and organic matter for all cultivars. The post harvest soil was collected from each plot in 6 cm depth and determined the bulk density by core sampler method using following equation: Bulk density (ρb) = (Ms/Vb) gcm^-3, where, Ms = Average mass of dry soil solids in gram and Vb = Volume of soil in cm³^. The soil pH was measured by glass electrode pH meter in 1: 2.5 soil water suspensions. The suspension was allowed to stand for one hour with occasional shocking before pH determination. Organic carbon and organic matter content was estimated following the method developed by Black. The principle underlying the method is to oxidize the organic matter with the excess of 1N K₂Cr₂O₇ solution in presence of concentrated H₂SO₄ and to titrate the remaining unreacted Cr₂O₇ -2 solution with NH₄FeSO₄. Finally, the organic carbon contents were then calculated by multiplying the percent organic carbon with the Van- Bemmelen factor 1.724. Grains obtained from each unit plot were sun dried and weighed carefully. The dry weights of grains of five sample plants were added to the respective unit plot to record the trial grain yield per plot. The grain yield was finally converted ton ha^-1. The findings were analyzed by partitioning the total variance with the help of computer by using MSTAT program. The treatment means were compared using Duncan's New Multiple Range Test (DMRT) as outlined by Gomez and Gomez.

Source of Information: J. Environ. Sci. & Natural Resources, 5(1): 239-242, 2012; ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

All the cultivars gave some-what better yield under inorganic management where the yield variation was minimum between organic and inorganic management. Conversely, organic culture had beneficial effects in improving soil properties and the sustainable agriculture mostly depends on soil organic matter. This organic matter will remain stable by using organic fertilizer.

Knowledge Management: Journal