Effects of different concentrations of sea water for broadleaf weed control in Zoysiam Atrella Turfgrass

Lee, Jessamyn , Yean May (2016) Effects of different concentrations of sea water for broadleaf weed control in Zoysiam Atrella Turfgrass. Universiti Malaysia Sabah. (Unpublished)

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Abstract

The widespread use of herbicides in weed control can pose harmful environmental effects. Thus, the search for alternative control methods can be adopted in weed control. The sea water can be used to control weeds in salt tolerant turfgrass areas. The study was carried out in a sand culture system in the rain shelter 10B of Faculty of Sustainable Agriculture, UMS to determine the effects of different concentrations of sea water application for broadleaf weed control in Zoysia matrella turfgrass and to determine the susceptibility of broadleaf weed species towards sea water application. The sandy soil had electrical conductivity (EC) 0.24 dSm-1, organic carbon 0.09%, nitrogen 0.34% and pH 5.23. Eight types of broadleaf weed species were used in this study including, Cleome rut dosperma, Desmodium triforum, Emilia sonchifolia, Euphorbia hirta, Hedyotis corymbosa, Mimosa pudica, Phyllanthus n/run, Portulaca oleracea and Zoysia matrella turfgrass as control. The broadleaf weeds and turfgrass were subjected to five different sea water treatments, namely 0 .0 (distilled water), 6.1,12.1,18.2 and 24.3 dSm-1. The EC of sea water collected was recorded at 48.5 dSm-1. Each treatment was replicated four times and arranged using Completely Randomized Design (CRD). The plant injury levels were visually evaluated to indicate the current conditions of broadleaf weeds and turfgrass at 3,5,10,15,20 and 25 days after initial sea water application. The fresh and dry weight of shoots and roots and total dry matter were measured and analyzed using two-way ANOVA at the 5% probability level. The treatment means were compared by Least Significance Differences (LSD). The results obtained showed that different species responded varyingly to different salinity level. There was significant interaction between concentration of sea water and different broadleaf weed and turfgrass species on plant injury level. Among the broadleaf weeds, H. corymbosa and C. rutidosperma were completely killed at the highest concentration of sea water at 24.3 dSm-1 after 20 and 25 day application respectively with injury level of 100 %. Z. matrella, M. pudica, D. triforum, and P.oleracea were among the least susceptible species at 24.3 dSm-1w ith injury level of 11 %, 16 %, 24 %, and 46 % respectively. Hence, it can be concluded that sea water can be utilized for selected broadleaf weed control in Z matrella turfgrass. The alternative would be essential to turf located near coastal areas where sea water can be used as irrigation and to control selected broadleaf weeds such as H. corymbosa and C. rutidosperma at the same time.

Item Type: Academic Exercise
Uncontrolled Keywords: Sea water, turfgrass , salt
Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling
Divisions: FACULTY > Faculty of Sustainable Agriculture
Depositing User: Noraini
Date Deposited: 08 Feb 2018 05:59
Last Modified: 08 Feb 2018 05:59
URI: http://eprints.ums.edu.my/id/eprint/18587

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