CD Tesis
Uji Efek Bioherbisida Kiambang (Salvinia Molesta) Terhadap Pertumbuhan Tanaman Padi Gogo (Oryza Sativa L.)
The main problem in rice cultivation is the presence of weeds which
cause a decrease in the quantity and quality of crop yields. Generally, farmers use
synthetic herbicides to control weeds. One way to reduce the use of synthetic
pesticides is the use of bioherbicides. The use of a dose of 60% kiambang extract
bioherbicide applied to babadotan weed is the best dose. However, it is not known
whether the use of kiambang extract bioherbicides on weeds will have a negative
effect on rice plants. The purpose of this study was to determine the effect of
kiambang extract (Salvinia molesta) on germination and vegetative growth of rice
plants.
The research was carried out at the Laboratory of Natural Materials
and Minerals, Chemical Engineering Study Program, Riau University,
Ecophysiology Laboratory, Faculty of Agriculture, University of Riau and
Experimental Land, Faculty of Agriculture, University of Riau. This study used a
completely randomized design (CRD), with treatment of 5 doses of kiambang
bioherbicide (Herbicide 2,4-D, bioherbicide 20%, 40%, 60% and 80%) and was
repeated 5 unit. so that there were 25 experimental units. Each experimental unit
2 plants. Bioherbicide effect test: seed germination test (percentage of
germination, germination rate, length of plumule and radicle) and plant
vegetative test (percentage of mortality, high growth rate, leaf chlorophyll
content, conductivity and stomata anatomy, photosynthesis rate , transpiration
rate, rice regrowth, phytotoxicity, and bioherbicide efficacy). Observational data
obtained were analyzed using analysis of variance (F test) at the 5% level. If the
results are real, then proceed with the BNT test with a level of 5% to determine
the difference between treatments.
The results of the bioherbicide effect test of kiambang extract (Salvinia
molesta) 20% did not inhibit seed germination but the seeds grew abnormally,
while the concentration of 40%–80% inhibited germination. Kiambang extract
bioherbicide (Salvinia molesta) has no effect on the physiological of rice plants in
the vegetative phase. Kiambang extract bioherbicide (Salvinia molesta) had an
effect on the percentage of mortality, phytotoxicity, regrowth and bioherbicide
efficacy in plants, however, rice plants were able to revive at 3 DAP which
kiambang bioherbicide was contact poison (temporary).
Key words : bioherbicide, kiambang, upland rice, germination, vegetative
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