Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Application of Nitrogen and Boron on Growth and Nutrient Contents of Okra (abelmoschus Esculentus L.) Grown on Soil

Marufa Aktar
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh.

A. H. M. Zulfiquar Ali
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh.

K. M. Rahman
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh.

Abstract/ Executive Summary:

A pot experiment was conducted in the net house of the Department of Soil, Water and Environment, University of Dhaka to find out the interactive effects of nitrogen (0, 30, 60 and 120 kg/ha) and boron (0, 0.5, 1 and 2 kg/ha) fertilizers on the growth and nutrient contents of okra (Abelmoschus esculentus L.). The increase in height of okra was significant (p<0.05) due to combined application of nitrogen and boron fertilizers. Maximum height, shoot and root dry matter yield and uptake of nutrients in root and shoot of okra were observed in treatment 30 kg N/ha with 1 kg B/ha (N₃₀B₁). But, higher doses of fertilizer combinations (60 and 120 kg of N/ha with B) responded differently. Higher doses of fertilizer combinations significantly (p<0.05) reduced shoot and root growth as well as the concentration and uptake of nitrogen, phosphorus potassium in okra. It could be concluded that the treatment combination of 30 kg N/ha with 1 kg B/ha can be used for better growth of okra.

Keywords: Okra, N and B fertilizers, Growth, Dry matter yield and uptake, Concentration of nutrients

Location: The river Turag, Near Baliarpur, Savar

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Okra

Objectives:

To evaluate the impacts of various levels of nitrogen and boron and their interaction on height, dry matter yield and nutrient contents of okra plants grown on soil.

Methodology:

Soil sample collected from the bank of the river Turag (Near Baliarpur, Savar) at a depth of 0-15 cm was air-dried, ground, sieved and stored in polyethylene bags for physical and chemical analysis. The physicochemical properties of soil are presented in this study. Eight kg air dried soil was taken in the plastic pot. Nitrogen at the rate of 0, 30, 60, 120 and boron at the rate of 0, 0.5, 1, 2 kg /ha were added according to treatment combinations. Treatments combinations (kgha^-1) were as follows: N₀B₀, N₀B₀.₅, N₀B₁, N₀B₂, N₃₀B₀, N₃₀B_0.5, N₀B₁, N₃₀B₂, N₆₀B₀, N₆₀B_0.5, N₆₀B₁, N₆₀B₂, N₁₂₀B₀, N₁₂₀B_0.5, N₁₂₀B₁ and N₁₂₀B₂. Urea and boric acid were used as a source of N and B, respectively. A basal dose of phosphorus and potassium at the rate of 50 kg/ha and 30 kg/ha was applied as triple super phosphate (TSP) and muriate of potash (MP), respectively (BARC 2005). The fertilizers were mixed thoroughly with the soil as per treatment combinations in the form of solution. There were 16 treatment combinations with 3 replications. Pots were arranged in a Randomized Complete Block Design (RCBD) design. Five seeds of okra (variety: okra green finger Fl) were sown per pot in pre-kharif season. After germination three seeds were kept in each pot. The pots were kept moist by adding distilled water, whenever required. Weeds were removed as they appeared. The uprooted roots of weeds were washed with small amount of water into the respective pot so that no nutrient loss could occurred by the roots. Insecticide was sprayed once at the last stage of growing period. Plant height was recorded at 10 days interval. Eight week old plants were harvested as shoots and roots. Roots were washed with water. Shoots and roots were air-dried, oven-dried (65°C), weighed, ground <1 mm) in a mechanical grinder and stored in air-tight polyethylene bags. For total N analysis, 0.1 g ground shoots and 0.01g ground roots was digested (360°C) with 5 ml concentrated H₂SO₄ and 2 ml 4% (VN) solution of perchloric acid (62%) in concentrated H₂SO₄. The concentration of N in shoots or roots was determined using micro kjeldahl's distillation apparatus in the presence of excess 40% NaOH. The concentration of P in shoots and roots was determined after developing yellow color with venado-molybdate at 470 mm wave length of spectrophotometer. The concentration of K in shoots and roots was determined by feeding the extract into a flame photometer. The uptake of N, P and K in shoots and roots was determined through multiplying concentration with total amount of shoot and root yields. All growth and nutrient concentration and uptake data are subjected to statistical analysis. ANOVA were done to observe any significant interactions between N and B (SPSS software ver. 20 and crop stat software ver. 7.2). LSD test was carried out to separate means.

Source of Information: J. Asiat. Soc. Bangladesh, Sci. 41(2): 173-181, December 2015

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present study revealed that the application of various doses of nitrogen and boron had significant effect on height, dry matter yield and nutrient contents of okra plants. Among the doses, nitrogen (N) at the rate of 30 kg/ha and boron (B) at the rate of 1 kg/ha gave maximum height, dry matter yield and uptake of NPK. This might be due to combined application of macro and micro nutrients.

Knowledge Management: Journal