Electronic Theses and Dissertation

Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh campuran herbisida clomazone, oksifluorfen dan pendimethalin terhadap pertumbuhan dan hasil tanaman kedelai. Rancangan yang digunakan adalah Rancangan Acak Kelompok (RAK) non faktorial yang terdiri dari 9 perlakuan dan 3 ulangan. Peubah yang diamati adalah bobot kering gulma, indeks persentase keracunan tanaman, jumlah polong per tanaman, bobot biji per tanaman, bobot 100 butir, jumlah biji per tanaman dan hasil biji kering. Hasil penelitian menunjukkan bahwa aplikasi campuran herbisida clomazone, oksifluorfen dan pendimethalin berpengaruh terhadap terhadap indeks keracunan tanaman pada 1 dan 2 MST, bobot kering gulma, serta bobot 100 butir. Aplikasi campuran clomazone dan oksifluorfen masing-masing sebanyak 0,5 kg b.a ha-1 dapat meningkatkan keracunan tanaman. Aplikasi campuran clomazone, oksifluorfen dan pendimethalin masing-masing sebanyak 0,3 kg b.a ha-1 dapat menurunkan bobot kering gulma dan meningkatkan bobot 100 butir.

Abstract. This study aimed to determine the effect of a mixture of herbicides clomazone, oxyfluorfen, and pendimethalin on the growth and yield of soybeans. The design used was a non-factorial Randomized Completely Block Design (RCBD) consisting of 9 treatments and 3 replications. The variables observed were weed dry weight, plant toxicity percentage index, number of pods per plant, seed weight per plant, weight of 100 grains, number of seeds per plant and dry seed yield. The results showed that the application of a mixture of herbicides clomazone, oxyfluorfen and pendimethalin affected plant toxicity index at 1 and 2 WAP, dry weight of weeds, and weight of 100 grains. Application of a mixture of clomazone and oxyfluorfen each as much as 0.5 kg a.i ha-1 can increase plant toxicity. Applications of a mixture of clomazone, oxyfluorfen and pendimethalin each as much as 0.3 kg a.i ha-1 can reduce the dry weight of weeds and increase the weight of 100 grains.