Pengaruh Metode Aplikasi Azotobacter terhadap Hasil Kedelai (Glycine max (L.) Merill) di Lahan Kering | Effect of Azotobacter Application Method on Yield of Soybean (Glycine max (L.) Merill) on Dry Land

Indonesio. Pupuk hayati dengan bahan aktif rizobakteri Azotobacter mampu meningkatkan kesuburan tanah dan meningkatkan pertumbuhan tanaman melalui fiksasi nitrogen dan produksi fitohormon. Tujuan penelitian ini adalah membandingkan respons tanaman serkedelai (Glycine max (L.) Merill) di lahan kering setelah aplikasi beberapa metode inokulasi Azotobacter. Percobaan lapangan dilakukan dengan Rancangan Acak Kelompok yang terdiri atas lima perlakuan dan lima ulangan. Perlakuan yang diuji adalah inokulasi benih, inokulasi melalui tanah sebelum tanam, inokulasi melalui tanah setelah tanam dan inokulasi melalui tajuk tanaman.  Pertamanan dengan inokulasi Azotobacter diberi pupuk urea 50 % dari dosis rekomendasi sedangkan tanaman kontrol mendapatkan urea dosis rekomendasi. Hasil percobaan menunjukkan bahwa seluruh metode aplikasi tidak mempengaruhi produksi kedelai, jumlah nodula, populasi Azotobacter di rizosfer dan N total tanah; tetapi aplikasi Azotobacter sp melalui daun meningkatan serapan N dan bobot 100 biji kedelai.

Inglés. Biofertilizer which contain rhizobacteria Azotobacter increase soil fertility and improve plant growth through nitrogen fixation and phytohormone production. The objective of this study was to compare the responses of soybean (Glycine max (L.) Merill) plants in dry land after the application of several Azotobacter inoculation methods. Field experiments were carried out with a randomized block design consisting of five treatments with five replicates each. The treatments were seed inoculation, soil treatment before planting, soil treatment after planting and plant dressing. Plant inoculation with Azotobacter treated with half of recommended dosage urea  while the control plant received recommended dose urea. The experimental results showed that all application methods did not affect soybean production, number of nodules, Azotobacter populations in the rhizosphere and N total soil; but Azotobacter inoculation through leaves increased N uptake and weight of 100 soybean seeds.