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Effect of Vermicompost and Npk Fertilizers on the Potassium and Sulphur Contents in Wheat and the Post Harvest Soil

M. S. I. Bhuiyan
Dept.of Soil Sci. SAU, Dhaka, Bangladesh

M.N. Islam
Professor, Dept.of Soil Sci. SAU, Dhaka

M. S. Haque
Professor, Dept. Soil, Water and Environment, DU, Dhaka, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted at the Sher-e-Bangla Agricultural University Farm, Dhaka 1207 during the Rabi season of 2004-2005 to study the effect ofvermicompost and NPK on potassium and sulphur content of wheat and in the post harvest soil. The treatments consisted of 4levels ofvermicomposts viz. V₀ (0 t ha-1), V₁ (1 t ha^-1), V₂ (2 t ha^-1),V₃ (3 t ha^-1), and 4 levels of chemical fertilizers viz. F₀= (0-0-0 kg NPK ha^-1), F1 = low (40-30-20 kg NPK ha^-1), F₂ = medium (80-60-40 kg NPK ha^-1), F₃ = high (120-80-60 kg NPK ha^-1) as N-P₂₀-K₂₀ with 16 treatments combinations. The results demonstrated that with increasing the doses of vermicomposts and chemical fertilizers, K and S content were increased in wheat straw at three stages and in the post harvest soil significantly. The highest doses of vermicompost and chemical fertilizers enhanced potssium and sulphur content at the maximum tillering stage.

Keywords: Vermicompost, NPK and nutrient content

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

Start Date: 00-11-2004

End Date: 00-04-2005

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

1. To study the effect ofvermicompost and NPK on potassium and sulphur content of wheat and in the post harvest soil.

Methodology:

This research work was conducted at the Sher-e-Bangla Agricultural University Farm during the. season of 2004-2005. A composite sample was made by collecting soil from several spots of the at a depth of 0-15 cm before the initiation of the experiment. The physical and cherr characteristics of initial soil were: pH 6.0, Textural Class Silty clay, Total N 0.078~10, Organic mi 0.88%, available Phosphorous 15 ppm, Potassium 0.0053 % and available Sulphur 17 p Vermicompost contained organic matter 11.03%, total N 0.6398%, available Phosphorous 22: (pprn), available Potassium 776.1 (ppm) and available Sulphur 306.10 (ppm). Shatabdi (BARI GC 21), a high yielding variety of wheat was used as the test crop in this experiment. The plot prepared for seed sowing through various methods on the 3rd November 2004. The experiment 1 laid out in Randomized Complete Block Design. The number of treatments was 16 wit! replications, so the total number of plots was 48; unit plot size was 4 m x 2.5 m (10m²). The distal maintained between two plots was 75 cm and between blocks was 150 cm. The experiment consists of 2 factors i.e. vermicompost and fertilizer each have four levels. Factor A (Vermicompost) Y₀= 0 t ha^-1 (No vermicompost), V₁ = 1 t ha^-1 (Low vermicompost), V₂ =2 t ha^-1 (Medium vermicompost), = 3 t ha^-1 (High vermicompost). Factor B (Fertilizer), F0 = 0 kg N ha^-1+ 0 kg P₂0₅ ha^-1+ 0 kg K₂0 ha^-1(No NPK); F₁ = 40 kg N ha^-1 + 30 kg P₂0₅ ha^-1 + 20 kg K₂0 ha^-1 (Low NPK), F₂ = 80 kg ha^-1 + kg P₂0₅ ha^-1 + 40 kg K₂0 ha^-1 (Medium NPK), F₃ =100 kg N ha^-1 + 80 kg P₂0₅ ha^-1 + 60 kg K₂0 ha^-1 (High NPK). Treatment combinations: V₀F₀ =Control (No vermicompost + No NPK), V₀F₁ =0 vermicompost + Low NPK), V₀F₂ = (No vermicompost + Medium NPK), V₀F₃ = (No vermicompost High NPK), V₁F₀ = (Low vermicompost + No NPK), V₁F₁ = (Low vermicompost + Low NPK), V₁F₂ = (Low vermicompost + Medium NPK), V₁F₃ = (Low vermicompost + High NPK), V₂F₀ = (Mediu vermicompost + No NPK), V₂F₁ = (Medium vermicompost + Low NPK), V₂F₂ = (Mediu vermicompost + Medium NPK), V₂F₃ = (Medium vermicompost + High NPK), V₃F₀ = (High vermicompost + No NPK), V₃F₁ = (High vermicompost + Low NPK), V₃F₂ = (High vermicompost + Medium NPK), V₃F₃ = (High vermicompost + High NPK).The required amount of P₂0₅ (as TSP) and K₂0 fertilizers(as MP) and 50% of the N fertilizer (urea) were uniformly spread as a basal dose. Remaining 50% of N (urea) was applied in two splits after 151 and 2nd irrigation at 17 days of sowing. Required amount of vermicompost was applied uniformly in the canals opened for sowing the seeds of wheat in Iines. Wheat seeds were sown on the 10 th November 2004 in lines as row-to-row distance ( 25 cm). The crop was harvested on 7 th March 2005. The harvested crop of each individual plots were recorded and the yields were expressed in t ha^-1. Plant samples were collected from every individual plot for laboratory analysis at three-growth stages i.e. maximum tillering, flowering and ripen in stages. Five plants were randomly collected from each plot. The plant samples were dried in the electric oven at 70⁰C for 48 hours, and then grounded and stored for chemical analysis. Post harvest soil samples were collected from each plot at 0-15 cm depth on 8 th March 2005. The samples were air-dried, ground and sieved through a 2 mm (10 mesh) sieve and kept for analysis. The data obtained from the experiment were analyzed statistically to find out the significance of the difference among the treatments. The significance of the differences among pairs of treatment means was estimated by the least significant difference (LSD) test at 5% and 1 % level of probability and DMRT was calculated.

Source of Information: J. Sher-e-Bangla Agric. Univ., 2(1): 68-73, January 2008; ISSN 1997-6038

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The results demonstrated that with increasing the doses of vermicomposts and chemical fertilizers, K and S content were increased in wheat straw at three stages and in the post harvest soil significantly. The highest doses of vermicompost and chemical fertilizers enhanced potssium and sulphur content at the maximum tillering stage.

Knowledge Management: Journal