Uji Aktivitas Bioherbisida Ekstrak Etil Asetat Teki (Cyperus rotundus L.) Terhadap Pertumbuhan Gulma Bayam Duri (Amaranthus spinosus L.)

Abstrak. Teki memiliki potensi sebagai bioherbisida karena dapat menghambat perkecambahan dan perkembangan tanaman. Pelarut merupakan unsur penting dalam siklus ekstraksi suatu senyawa, pelarut akan mengeluarkan senyawa sesuai fungsinya. Dalam penelitian ini, etil asetat digunakan bersifat semi polar, artinya menarik campuran polar non tingkat bahaya yang rendah volatil sehingga lebih berpeluang untuk ekstraksi. Tujuan ini mengetahui bagaimana aktivitas ekstrak teki pada berbagai konsentrasi terhadap gulma berduri bayam bayam. Penelitian dilaksanakan di Laboratorium Ilmu Gulma Jurusan Agroteknologi Rumah Kasa Kebun Percobaan Fakultas Pertanian, Pendidikan Kimia Keguruan Pendidikan, Biologi Matematika Pengetahuan Alam Universitas Syiah Kuala, Banda Aceh. dimulai dari bulan Juni sampai September 2021. menggunakan Rancangan Acak Lengkap pola faktorial dengan 6 perlakuan yaitu 2,4-D 0,686 kg b.a.ha-1 (kontrol positif); aquades negatif);ekstrak 5%; 10%; 15%; 20%, 3 kali ulangan, terdapat 18 satuan percobaan. Setiap percobaan terdiri 2 pot, 36 Hasil menunjukkan bahwa pemberian 20% menurunkan diameter batang tinggi duri umur 7 HSA. Berdasarkan hasil uji fitokimia mengandung fenolik, tanin, flavonoid, terpenoid, streroid alkaloid.Bioherbicide Activity Test of The Ethyl Acetate Extract Nut Grass (Cyperus rotundus L.) on Growth Weed Spiny Amaranth (Amaranthus spinosus L.)Abstract. nut grass has potential as a bioherbicide because it can inhibit plant germination and development. solvent is an important element in the extraction cycle compound, will remove compound according to its function. In this study, ethyl acetate was used meaning that attract mixture non-polar, low level danger volatile so more likely be extraction. purpose study determine how activity extract at various concentrations development spiny amaranth weed. research carried out Science Laboratory, Agrotechnology Department Screen House for Experimental Gardens, Faculty Agriculture, Chemistry Education Teacher Training Educational Sciences, Biology Mathematics Natural Kuala University, This started from June completely randomized design with non-factorial pattern treatments, namely 0.686 a.i.ha-1 (positive control); (negative 5% grass; replications, there are experimental units. Each unit consisted pots, were results showed administration concentration reduced stem height thorn aged day after application. Based phytochemical tests, contains phenolic compounds, tannins, flavonoids, terpenoids, steroids alkaloids.