Electronic Theses and Dissertation

Keberadaan gulma dapat mempengaruhi hasil tanaman kedelai, sehingga perlu dikendalikan dengan menggunakan herbisida. Penelitian ini bertujuan untuk mengetahui pengaruh persaingan gulma dan hasil tanaman kedelai akibat aplikasi campuran herbisida clomazone dan oksifluorfen. Penelitian ini telah dilaksanakan di Desa Blang Krueng, Kecamatan Baitussalam, Aceh Besar dan di Laboratorium Pengelolaan Gulma Departemen Agroteknologi Fakultas Pertanian Universitas Syiah Kuala, Banda Aceh. Penelitian ini berlangsung dari Januari-April 2024. Bahan yang digunakan dalam penelitian ini adalah benih kedelai Varietas Devon 1, herbisida clomazone dan herbisida oksifluorfen, pupuk Urea, TSP, dan KCl, rhizogen, insektisida karbofuran dan deltametrin. Alat-alat yang digunakan dalam penelitian ini yaitu handtractor, cangkul, knapsack sprayer berukuran 15 L, timbangan digital dan alat suntik 1 dan 5 ml. Penelitian ini menggunakan Rancangan Acak Kelompok pola non faktorial dengan 8 taraf perlakuan 3 ulangan. Adapun taraf perlakuan terdiri dari kontrol, clomazone 1,5 kg b.a ha-1, oksifluorfen 1,5 kg b.a ha-1, clomazone 0,75 kg b.a ha-1 + oksifluorfen 0,75 kg b.a ha-1, clomazone 1 kg b.a ha-1 + oksifluorfen 1 kg b.a ha-1, clomazone 0,5 kg b.a ha-1 + oksifluorfen 1 kg b.a ha-1, clomazone 1 kg b.a ha-1 + oksifluorfen 0,5 kg b.a ha-1, clomazone 0,5 kg b.a ha-1 + oksifluorfen 0,5 kg b.a ha-1. Peubah yang diamati adalah bobot kering gulma 56 HST, indeks persentase keracunan tanaman 7, 14, 21, dan 28 HST, jumlah polong per tanaman, bobot biji per tanaman, bobot 100 butir, jumlah biji per tanaman, dan hasil biji kering. Hasil penelitian ini menunjukkan bahwa campuran herbisida berpengaruh sangat nyata terhadap peubah bobot kering gulma 56 HST dan indeks keracunan tanaman pada 7, 14, 21, dan 28 HST, dan berpengaruh tidak nyata pada peubah jumlah polong per tanaman, jumlah biji per tanaman, bobot biji per tanaman, bobot 100 butir, dan hasil biji kering kedelai. Aplikasi herbisida campuran clomazone 0,5 kg b.a ha-1 + oksifluorfen 0,5 kg b.a ha-1 menjadi perlakuan yang paling efektif untuk menurunkan bobot kering gulma pada tanaman kedelai.

The presence of weeds can affect the yield of soybean crops, so it needs to be controlled by using herbicides. This study aims to determine the effect of weed competition and soybean crop yields due to the application of a mixture of clomazone and oxifluorfen herbicides. This research was conducted in Blang Krueng Village, Baitussalam District, Aceh Besar and in the Weed Management Laboratory of the Department of Agrotechnology, Faculty of Agriculture, Syiah Kuala University, Banda Aceh. This research took place from January-April 2024. The materials used in this study were soybean seeds of Devon 1 variety, clomazone herbicide and oxifluorfen herbicide, Urea, TSP, and KCl fertilizers, rhizogen, carbofuran and deltametrin insecticides. The tools used in this research are handtractor, hoe, knapsack sprayer measuring 15 L, digital scales and syringes 1 and 5 ml. This study used a non-factorial pattern Randomized Group Design with 8 treatment levels 3 replicates. The treatment levels consisted of control, clomazone 1.5 kg b.a ha-1, oxifluorfen 1.5 kg b.a ha-1, clomazone 0.75 kg b.a ha-1 + oxifluorfen 0.75 kg b.a ha-1, clomazone 1 kg b. a ha-1 + oxifluorfen 1 kg b.a ha-1, clomazone 0.5 kg b.a ha-1 + oxifluorfen 1 kg b.a ha-1, clomazone 1 kg b.a ha-1 + oxifluorfen 0.5 kg b.a ha-1, clomazone 0.5 kg b.a ha-1 + oxifluorfen 0.5 kg b.a ha-1. The observed variables were weed dry weight 56 HST, plant toxicity percentage index 7, 14, 21, and 28 HST, number of pods per plant, seed weight per plant, 100-grain weight, number of seeds per plant, and dry seed yield. The results showed that the herbicide mixture had a very significant effect on the variable weed dry weight 56 HST and plant toxicity index at 7, 14, 21, and 28 HST, and had no significant effect on the variable number of pods per plant, number of seeds per plant, seed weight per plant, 100-grain weight, and dry seed yield of soybean. The mixed herbicide application of clomazone 0.5 kg b.a ha-1 + oxifluorfen 0.5 kg b.a ha-1 was the most effective treatment to reduce weed dry weight in soybean plants. Translated with DeepL.com (free version)