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Solid Waste Management: Effectiveness of Composts on Productivity of Soils

S. R. Molla
Soil Science Discipline, Khulna University, Khulna-9208, Bangladesh

S. M . lmamul Huq
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

Abstract/ Executive Summary:

A pot experiment was conducted to study the effectiveness of aerobic compost (AC) and barrel compost (BC) on crop (Amaranthus) yield and soil properties in two soils (Mela ndaha and Dhamrai series). The soils were treated with composts and/or fertilizer (N and P). The doses of compost s were 1 t ha^-1, 1.5 t ha^-1and 2 t ha^-1. The dry matter yield increased due to the treatments, showing higher yield due to the barrel compost in Melandaha soil but the best result was obtained for aerobic compost at the rate of 1.5 t ha^-1 along with fertilizer in same soil.

Keywords: Amaranthus, Compost, Availability, Uptake, Productivity and growth

Location: Mirpur, Dhaka, Bangladesh

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Land development productivity

Objectives:

To see the effectiveness of these two types of composts on crop yield and soil properties.

Methodology:

A pot experiment was conducted in Melandaha and Dhamrai series soils (0-15 cm depth) amended with two types of composts (aerobic compost and barrel compost). The composts were collected from Waste Concern which is a research based organization situated at Mirpur in Dhaka, Bangladesh. Two kg air-dried soil (that was previously prepared) was taken into each small earthen pot. The properties the soils are presented. There were 14 treatment combinations, each treatment replicated thrice. So, the total number of pots was 84 (2x 14x3). To the first set of experiments, neither compost nor fertilizer was added (control). The second, third & forth set received I , 1.5 and 2 t ha^-1 composts, respectively. The fifth, sixth and seventh sets of experiment received additional (N plus P) fertilizer along with the compost. For Melandaha soil, 96.20 Kg ha.1N and 28. 13 Kg ha^-1 P₂0₅ and for Dhamrai soil, 77.13 Kg ha^-1 N and 30.75 Kg ha^-1 P₂0₅ were added to maintain the normal plant growth, as obtained from the Fertilizer Recommendation Guide (BARC, 1997). The compost and fertilizer were well mixed with the soil. The pots were arranged in a completely randomized design. Amaranthus seeds were sown and after emergence 5 seedlings were kept in each pot. Water was added to bring the soil to field moisture Condition. Amaranthus were harvested after 42 days and the dry matter weight was measured. Total N of the samples was determined by Kjeldahl method as described. Total P was determined following the ascorbic acid method after digesting it by HN0₃-HCI0₄ mixture as described. Flame photometer determined total and available K. Available N was determined by Micro- Kjeldahl distillation method using Deverda 's alloy as described by Black after extraction of soil by IM NaCI solution. Available P was determined calorimetrically. Depending on the pH, the extraction of soil P was made with Bray-1 (Bray and Kurtz No-I) solution as described.

Source of Information: Khulna University Studies 4 (I): 671-676

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In most cases, it was found that the availability of N, P and K increased significantly (p-1 along with fertilizer (ACuF). Moreover, preparation of aerobic compost is more convenient and less time consuming. Using compost along with fertilizer will reduce the cost of fertilizer and thus, will help to bring down the production cost of a crop.

Knowledge Management: Journal