Volume:3 Issue:11 Nov ' 2017
||Evaluation of the effect of crepe rubber effluent and inorganic fertilizer on growth performance and nutrient uptake of betel vines
P. V. A. Anushka , N.D.K. Dayawansa , M.I.M. Mowjood , R.P. Hettiarachchi.
Evaluation of the effect of crepe rubber effluent and inorganic fertilizer on growth performance and nutrient uptake of betel vines
The fertilizing ability of the rubber effluent/wastewater on edible crops has been observed by many researches. This technique can fulfill the pollution control purpose together with beneficial utilization of available nutrients contained in the effluent. The aim of this study was to investigate the effect of rubber effluent versus inorganic fertilizer on the early growth and the nutrient uptake of the betel vines. The pot experiment was established as Randomized Complete Block Design in six treatments and replicated six times. The treatments include: Normal fertilizer recommendation (T1), ¾ fertilizer recommendation + ¼ Effluent (T2), 1/2 fertilizer recommendation + 1/2 Effluent (T3), ¼ fertilizer recommendation + ¾ Effluent (T4), Effluent applications (T5) and No any fertilizer or effluent application (T6). Data were collected on growth parameters: leaf area, dry weight, length of the vine, number of branches, leaf count and as secondary parameters: leaf weight ratio and specific leaf area. Nitrogen, potassium and phosphorous percentages in the plant parts and the Soil pH, Soil total nitrogen and the soil exchangeable potassium level were also measured. The results show that the application of rubber effluent in combination with recommended fertilizer had a positive impact on growth components of betel. Leaf is the economical part of betel vine and higher leaf area observed in T4 and T5 while the lowest in T1 and T6. Effluent has helped to increase total dry weight (highest in T5 and secondly other wastewater: fertilizer treatments). The result of the mineral composition of the betel leaves, stems and roots after application of the effluent treatment showed more or similar improvement to the recommended fertilizer with respect to intake of nitrogen, phosphorous and potassium nutrients. Effluent application had enabled the soil to be enriched with potassium and total nitrogen as well. There was a significant increment of soil pH in wastewater applied betel plant sets over control set (T1) after the experiment since wastewater is acidic; wastewater application has increased the soil pH. These results conclude that the application of rubber effluent has a positive impact as a fertilizer with no apparent adverse effect to the environment. However, long term implications on plants should be further investigated before make a recommendation.
Keywords— Betel, Growth parameters, Inorganic fertilizer, Rubber effluent