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Effect of Integrated Nutrient Management on Soil Properties

M.K. Islam
Department of Soil Science, Patuakhali Science & Technology University, Dumki, Patuakhali-8602, Bangladesh.

M.S.I. Majumder
Department of Soil Science, Patuakhali Science & Technology University, Dumki, Patuakhali-8602, Bangladesh.

M.S. Hossin
Department of Soil Science, Patuakhali Science & Technology University, Dumki, Patuakhali-8602, Bangladesh.

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

A.K. Paul
Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh.

Abstract/ Executive Summary:

A field experiment was conducted at Sher-e- Bangla Agricultural University research farm during boro season of 2012 to evaluate the effect of integrated nutrient management on grain yield and soil properties. Treatment (T₅) comprising the integrated use of 100 kg N/ha from urea along with 40 kg N/ha from cowdung produced the highest grain yeild. The maximum organic matter and the total nitrogen content (0.070%) of post harvest soils were also found in T5 treatment. The highest available P (11.77 ppm) and exchangeable potassium (22.42 me/100g soil) were found in treatment T6 (100 kg N/ha from urea along with 40 kg N/ha from vermicompost). As a result of integrated nutrient management, cowdung and vermicompost alone or with the combination of nitrogenous fertilizer insignificantly decreased soil pH, slightly increased total N, available P and exchangeable K in post harvest soils compared to initial soils of the experimental field.

Keywords: Soil properties, INM, Soil nutrient contents

Location: Sher-e- Bangla Agricultural University research farm

Start Date: 10-01-2012

End Date: 11-05-2012

Program Area: Crop-Soil-Water Management

Commodity: Soil fertility

Objectives:

1. To investigate the effect of cowdung and vermicompost along with nitrogenous fertilizer on crop yield and soil properties.

Methodology:

The experiment was carried out at research farm of Sher-e-Bangla Agricultural University, Dhaka-1207 during Boro season of 2011-2012. BRRIdhan29 a high yielding variety was used as the test crop. The seedlings were raised in nursery bed and the proper care was taken. The initial soil sample was collected from the experimental field before manuring and fertilization. The collected soil samples were air dried, ground and passed through 2mm sieve. The samples were then analyzed for physical and chemical properties Land was prepared for the cultivation of BRRIdhan29. The experiment was laid out in the Randomized Complete Block Design (RCBD). The entire experimental area was divided into 3 blocks representing the replications and each block was subdivided into 12 unit plots and the total number of unit plots was 36. The unit plot size was 3.5 m × 2.0 m. The treatments were comprised as T₁: (140kg N/ha from urea + PKS and Zn as per recommendation), T₂: 120kg N/ha from urea+ 20 kg N/ha from cowdung, T₃:120kg N/ha from urea+ 20 kg N/ha from vermicompost, T₄: 120kg N/ha from urea+ 10 kg N/ha from cowdung+10kg N/ha from vermicompost, T₅: 100kg N/ha from urea+ 40 kg N/ha from cowdung, T₆: 100kg N/ha from urea+ 40 kg N/ha from vermicompost, T₇: 100kg N/ha from urea+ 20 kg N/ha from cowdung, +20 kg N/ha from vermicompost, T₈: 80kg N/ha from urea+ 60 kg N/ha from cowdung, T₉: 80kg N/ha from urea+ 60 kg N/ha from vermicompost, T₁₀: 80kg N/ha from urea+ 30 kg N/ha from cowdung+30kgN/ha from vermicompost, T₁₁: 70kg N/ha from cowdung+ 70 kg N/ha from vermicompost, T₁₂: No chemicals and no manures) were randomly distributed within each block. PKS and Zn were used as basal dose and the Urea was top dressed in three equal installments (splits) at 15, 35 and 60 days after transplanting. Treated nutrient was nitrogen from urea along with well decomposed cowdung and vermicompost. Thirty five days old seedlings were transplanted in the experimental plots on 10 January, 2012 in Boro season. Necessary intercultural operations like weeding and irrigations were done as and when necessary. The crops were harvested plot wise at maturity on 11 May 2012. The post harvest soils were chemically analyzed by the following methods, soil pH by glass electrode pH meter,organic matter by wet oxidatio, total nitrogen by micro kjeldahl, available phosphorus by 0.5M NaHCO₃ extraction and the exchangeable potassium by ammonium acetate extraction method. The data were analyzed statistically by using MSTATC program and the means were compared according to LSD at 5% level of significant.

Source of Information: J. Agrofor. Environ. 7 (2): 179-181, 2013; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Treatment (T₅) comprising the integrated use of 100 kg N/ha from urea along with 40 kg N/ha from cowdung produced the highest grain yeild. The maximum organic matter and the total nitrogen content (0.070%) of post harvest soils were also found in T₅ treatment. The highest available P (11.77 ppm) and exchangeable potassium (22.42 me/100g soil) were found in treatment T₆ (100 kg N/ha from urea along with 40 kg N/ha from vermicompost). As a result of integrated nutrient management, cowdung and vermicompost alone or with the combination of nitrogenous fertilizer insignificantly decreased soil pH, slightly increased total N, available P and exchangeable K in post harvest soils compared to initial soils of the experimental field.

Knowledge Management: Journal