Electronic Theses and Dissertation

Penelitian ini bertujuan untuk mengetahui pertumbuhan dan perubahan komposisi gulma pada kedelai akibat aplikasi herbisida pendimethalin dan sulfentrazone pada berbagai taraf dosis. penelitian ini dilaksanakan di bantaran sungai krueng aceh, desa gla deyah, kecamatan krueng barona jaya, aceh besar pada ketinggian 2 meter di atas permukaan laut (mdpl) dan laboratorium pengelolaan gulma, fakultas pertanian, universitas syiah kuala, banda aceh sejak desember 2021 - april 2022. penelitian ini menggunakan rancangan acak kelompok (rak) pola non faktorial yang terdiri dari 24 kombinasi perlakuan. parameter yang diamati adalah persentase pengendalian gulma, persentase penutupan gulma, spesies gulma, individu gulma, bobot kering gulma dan nilai koefisien komunitas. campuran herbisida pendimethalin 1 kg b.a ha-1 + sulfentrazone 0,5 kg b.a ha-1 mampu meningkatkan persentase pengendalian gulma 97 % dan 92 % pada 3 dan 5 mst, menurunkan persentase penutupan gulma 3% dan 8 % pada 3 dan 5 mst, menurunkan individu gulma, spesies gulma dan bobot kering gulma. gulma yang dapat dikendalikan menggunakan campuran herbisida pendimethalin 1 kg b.a ha-1 + sulfentrazone 0,5 kg b.a ha-1 adalah euphorbia hirta, tridax procumbens, dan ipomea lacunose. kata kunci : campuran herbisida, gulma, pendimethalin, sulfentrazone, kedelai

The purpose of this study was to determine the growth and changes in weed composition in soybeans due to the application of pendimethalin and sulfentrazone herbicides at various dosage levels. This research was conducted in Krueng Aceh Riverside, Gla Deyah Village, Krueng Barona Jaya District, Aceh Besar at altitude of 2 meters above sea level (masl) and Weed Management Laboratory, Faculty of Agriculture, Syiah Kuala University, Banda Aceh from December 2021 - April 2022. This study used a non-factorial Randomi zed Completely Block Design (RCBD) consisted of 24 treatment combinations. Parameters observed were percentage of weed control, percentage of weed cover, weed species, number of weeds, dry weight of weeds and community coefficient values. Herbicide mixture pendimethalin 1 kg a.i ha-1 + sulfentrazone 0.5 kg a.i ha-1 was able to increase the percentage of weed control 97% and 92% at 3 and 5 WAP, reduce the percentage of weed cover 3% and 8% at 3 and 5 WAP, reduce number of weeds, weed species and weed dry weight. Weeds could be controlled using a mixture of herbicide pendimethalin 1 kg a.i ha-1 + sulfentrazone 0.5 kg a.i ha-1 were Euphorbia hirta, Tridax procumbens, and Ipomea lacunose. Keywords : Mixture Herbicide, Weeds, Pendimethalin, Sulfentrazone, Soybean