Electronic Theses and Dissertation

Tujuan dari penelitian ini adalah untuk menilai dampak ekstrak n-heksana dari babadotan terhadap pertumbuhan dan aktivitas fisiologi gulma bayam duri (Amaranthus spinosus L.). Penelitian ini dilaksanakan dari Desember 2022 hingga April 2023 di Laboratorium Ilmu Gulma, Jurusan Agroteknologi, Kebun Percobaan 2 Pertanian, dan Ruang Analisis Sampel, Jurusan Kimia FMIPA, Universitas Syiah Kuala. Metode yang digunakan dalam penelitian ini adalah Rancangan Acak Fakultas Lengkap (RAL) dengan pola non faktorial yang mencakup 6 perlakuan berbeda, yaitu K0 = Kontrol positif (herbisida 2, 4-D), K1 = Kontrol negatif (aquades), K2 = Konsentrasi ekstrak 5%, K3 = Konsentrasi ekstrak 10%, K4 = Konsentrasi ekstrak 15%, K5 = Konsentrasi ekstrak 20%, dan setiap perlakuan diulang sebanyak 3 kali, sehingga terdapat total 18 unit percobaan, setiap unit percobaan terdiri dari 5 pot, sehingga jumlah total unit percobaan adalah 90. Hasil penelitian ini menunjukkan bahwa aplikasi ekstrak n-heksana babadotan pada konsentrasi 15% menghasilkan efek terbaik dan tidak berbeda secara signifikan dengan konsentrasi 20% dan 2,4-D dalam kemampuannya untuk mematikan gulma pada 7 Hari Setelah Aplikasi (HSA) dan dapat menghambat pertumbuhan tinggi, jumlah daun, diameter batang, panjang akar, bobot kering tajuk, bobot kering akar, dan laju transpirasi gulma bayam duri. Hasil fitokimia ekstrak n-heksana babadotan mengandung beberapa senyawa metabolit sekunder yaitu alkaloid dan terpenoid.

This study is undertaken to investigate the effects of the n-hexane extract from babadotan on the growth and physiological activities of spiny amaranth weeds (Amaranthus spinosus L.). The research was conducted between December 2022 and April 2023, taking place at three different locations: the Weed Science Laboratory within the Department of Agrotechnology, Experimental Garden 2 within the Faculty of Agriculture, and the Sample Analysis Room within the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Syiah Kuala University. The experimental design utilized a Completely Randomized Design (CRD) with a non-factorial structure, incorporating six distinct treatments: K0 = Positive control (2,4-D herbicide), K1 = Negative control (aquades), K2 = 5% extract concentration, K3 = 10% extract concentration, K4 = 15% extract concentration, K5 = 20% extract concentration, and was replicated three times, resulting in a total of 18 experimental units. Each experimental unit comprised five pots, yielding a grand total of 90 experimental units. The results of this research indicate that the application of n-hexane extract from babadotan at a concentration of 15% yielded the best effect and did not significantly differ from the 20% concentration and 2,4-D in its ability to control weeds at 7 Days After Application (DAA). It also inhibited the growth of spiny amaranth weeds in terms of height, leaf count, stem diameter, root length, shoot dry weight, root dry weight, and transpiration rate. Phytochemical analysis of the n-hexane extract from babadotan revealed the presence of several secondary metabolites, including alkaloids and terpenoids.