Electronic Theses and Dissertation

Abstrak. gulma adalah tumbuhan yang tumbuh di sekitar tanaman budidaya yang tidak dikendakikeberadaannya, umumnya merugikan karena dapatmenghambat pertumbuhan sehingga menyebabkanpenurunan kuantitas dan kualitas produksipertanian. tujuan penelitian ini adalah untukmengetahui aktivitas etil asetat (subfraksi b) ekstrak babadotan terhadap pertumbuhan gulmabayam duri. penelitian dilaksanakan di laboratorium ilmu gulma jurusan agroteknologifakultas pertanian, laboratorium herbarium jurusan biologi fakultas matematika dan ilmupengetahuan usk, laboratorium kimia organikfakultas matematika dan ilmu pengetahuan alam(fmipa) dan kebun percobaan fakultas pertanianusk, banda aceh sejak januari sampai denganjuli 2022. bahan dasar yang digunakan dalampenelitian ini adalah babadotan (ageratumconyzoides l.) dengan pelarut etil asetat dantanaman indikator yaitu gulma bayam duri(amaranthus spinosus l.). etil asetat merupakanpelarut semi polar yang dapat menyerap senyawapolar dan non polar, memiliki toksisitas rendah danmudah menguap sehingga sangat baik untuk proses ekstraksi. penelitian ini menggunakan rancanganacak lengkap (ral) pola non faktorial yang terdiri atas tujuh perlakuan dan tiga ulangan. parameter yang diamati adalah tinggi gulma, jumlah daun dan diameter batang. hasil penelitianmenunjukkan bahwa aplikasi ekstrak etil asetatbabadotan (subfraksi b) pada konsentrasi yang berbeda berpengaruh sangat nyata terhadappertumbuhan gulma bayam duri. aplikasi ekstraketil asetat babadotan (subfraksi b) padakonsentrasi 10% sangat efektif dalam menghambatpertumbuhan gulma bayam duri pada 7 hsa.

Abstract. Weeds are plants that grow with cultivated plants whose presence is not desired, generally detrimental because they can inhibit growth so it decrease the quantity and quality of agricultural production. The purpose of this study was determined the activity of ethyl acetate (Subfraction B) billygoat weed extract on the growth of spiny amaranth weeds. The research was carried out at the Weed Science Laboratory, Agrotechnology Department, Faculty of Agriculture, Herbarium Laboratory, Biology Department, Faculty of Mathematics and Natural Sciences, Chemical Analysis Laboratory, Faculty of Teacher Training and Education, Laboratory of Organic Chemistry, Faculty of Mathematics and Natural Sciences and the Experimental Garden of the USK Faculty of Agriculture, Banda Aceh from January to July 2022. The basic material used in this study was billygoat weed (Ageratumconyzoides L.) with ethyl acetate solvent and an indicator plant, namely spiny amaranth weed (Amaranthus spinosus L.). Ethyl acetate is a semi-polar solvent that can absorb polar and non-polar compounds, has low toxicity and is volatile so it is very good for the extraction process. This study used a Completely Randomized Design (CRD) with a non-factorial pattern consisting of seventreatments and three replications. The parameters observed were weed height, number of leaves and stem diameter. The results showed that the application of billygoat weed ethyl acetate extract (Subfraction B) at different concentrations had a very significant effect on the growth of spiny amaranth weed. The application of billygoat weed ethyl acetate extract (Subfraction B) at a concentration of 10% was very effective in inhibiting the growth of spiny amaranth weed at 7 DAA.