EVALUATION OF WASTE STABILIZATION PONDS EFFLUENT EFFICIENCY ON THE GROWTH AND NUTRITIVE CHARACTERISTICS OF CLUSTER BEANS (CYAMOPSIS TETRAGONOLOBA L.) TAUB.
PAKISTAN JOURNAL OF BOTANY(2014)
Abstract
South Asian countries including Pakistan are facing chronic shortage of water supply which is anticipated to be aggravated in future. These countries are agribased where the continued water supply is crucial for sustainable economy. One of the possible alternatives to overcome the problems of water scarcity is the used of treated wastewater which is gaining much importance even in the western world. The treated wastewater can be used as a liquid fertilizer which could provide dual benefits both in terms of saving of fresh water as well as inorganic fertilizers. The potential of treated effluent from waste stabilization ponds (WSP) and equivalent basal fertilizer on growth and nutritive quality of cluster beans (Cyamopsis tetragonoloba L.) Taub. was investigated under field conditions. Treated effluent significantly increased fresh weight of leaves and stems. Dry weight of stem was also significantly higher with the treatment of WSP effluent as compared to the use of basal fertilizer and fresh water. Fresh and dry fruit weights, number of seeds per fruit and fruit length were also significantly increased in WSP effluent treatment as compared to other two treatments. Treatment with WSP effluent also improved the nutritive characteristics such as crude proteins and total carbohydrates. However, total fat and ash content percentage of Cyamopsis tetragonoloba remained unaltered. The application of WSP effluent also increased NPK and organic matter content of the soil after harvesting the crop which would be helpful for succeeding crop. The study demonstrated that treated effluent can be successfully used for unrestricted irrigation in the water deficient areas of Pakistan thereby saving huge quantities of fresh water.
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Key words
cluster beans,waste
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