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Leaching Loss of Some Macro-and Micro-nutrients in Rice Field Under Different Irrigation Methods

A. A. HASSAN
Bangladesh Institute of Nuclear Agriculture, P. O. Box No.4, Mymensinqh, Bangladesh

A. A. SARKAR
Bangladesh Institute of Nuclear Agriculture, P. O. Box No.4, Mymensinqh, Bangladesh

M. I. ALl
Bangladesh Institute of Nuclear Agriculture, P. O. Box No.4 , Mymensinqh, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted at BINA farm to study the effect of different irrigation methods on the movement of some macro-and micro-nutrients in rice field. Different irrigation methods had significant influence on the yield and yield contributing characters of rice. Highest yield (4.75 t/ha) was obtained in irrigation treatment of continuous flooding (8-10 cm standing water) that needed irrigation after every 2 days of interval and the lowest yield (2.76 t/ha) was obtained in irrigation treatment of furrow method (saturated condition upto 5.0 centibar. Different Irrigation methods had also distinct effect on the movement of nutrients. Distinct losses of N were noted for different methods of irrigation except alternate drying and wetting. Substantial losses of S, Cu and Mg were recorded in furrow method of irrigation. Other properties of soil like pH and K remained unchanged for all irrigation treatments.

Keywords: Leaching loss, Macro-and micro-nutrients, Irrigation methods, Rice

Location: The experimental farm, Bangladesh Institute of Nuclear Agriculture, Mymensingh.

Start Date: 01-02-1986

End Date: 31-05-1986

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

1. To find out a suitable water application methods taking into consideration of the effects of irrigation with some macro- and micro-nutrient problems in the soil.

Methodology:

A field experiment was conducted during February to May 1986 with IRATOM-24 variety of rice at the experimental farm of Bangladesh Institute of Nuclear Agriculture, Mymensingh. The irrigation treatments were as follows: I₀ = Alternate flooding upto saturation and drying from 0 to 5.0 cb. (flooding) I₁ = 3-5 cm standing water (Basin irrigation) I₂ = 8-10 cm standing water (Basin irngation) I₃ = 5 rows in between furrows maintaining saturated condition of 0 to 5.0 centibar (cb). The experiment was laid out in randomized block design in 5m X 4m plot sizes with three replicates. Rice plants were transplanted with row to row distance of 25 cm and plant to plant distance of 10 cm. A basal dose of 80kg P₂0₅, 60 kg K₂0, 15 kg S (from gypsum) and 4 kg Zn (as ZnO) per hectare were applied during the time of land preparation. Nitrogen as urea was applied at the rate of 100 kg/ha in 3 equal splits, first at tillering initiation, second at rapid tillering stage and third at panicle initiation stage. The crop was harvested on 25th May, 1986. The harvested crop was threshed, dried and weighed. The data on grain and straw yields, number of tillers/plant, plant height and panicle length were recorded. Soil samples were collected plot wise after harvesting the crops from 15-30 cm depth. Initial and after harvest soil samples were analysed in BARI's laboratory following the methods developed at the Agro-Services international, Florida, USA.

Source of Information: NUCLEAR SCIENCE AND APPLICATIONS, VOL. I, NO.2, JULY, 1989

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Distinct losses of N were noted for different methods of irrigation except alternate drying and wetting. Substantial losses of S, Cu and Mg were recorded in furrow method of irrigation. Other properties of soil like pH and K remained unchanged for all irrigation treatments.

Knowledge Management: Journal