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Abstrak (Bhs. Indonesia)

Penelitian ini bertujuan untuk 1) mengetahui pengaruh aplikasi metabolit sekunder P. fluorescens P60 dalam mendegradasi residu senyawa herbisida glifosat di dalam tanah, 2) menganalisis kandungan senyawa glifosat di dalam tanah setelah aplikasi, dan 3) mengetahui pengaruh aplikasi metabolit sekunder P. fluorescens P60 terhadap pertumbuhan tanaman pada tanah tercemar residu herbisida glifosat yang telah diremediasi. Penelitian ini dilaksanakan pada bulan November 2020 sampai dengan Maret 2021 di Screen House dan Laboratorium Perlindungan Tanaman Fakultas Pertanian, Universitas Jenderal Soedirman. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) dengan 5 perlakuan, yaitu tanah tercemar herbisida glifosat tanpa aplikasi metabolit sekunder P. fluorescens P60, dan aplikasi metabolit sekunder P. fluorescens P60 dengan konsentrasi 50, 100, 150, dan 200% dengan 5 ulangan. Variabel yang diamati yaitu kadar residu herbisida glifosat pada tanaman jagung yang dianalisis di Balai Besar Perbenihan dan Proteksi Tanaman Perkebunan Surabaya, tinggi tanaman, jumlah daun, panjang akar, bobot segar tanaman, bobot kering tanaman, dan kandungan klorofil. Hasil penelitian menunjukkan bahwa 1) Aplikasi metabolit sekunder P. fluorescens P60 mampu menurunkan kadar residu herbisida glifosat di dalam tanah. 2) Penurunan residu herbisida glifosat terbaik terjadi pada perlakuan aplikasi metabolit sekunder P. fluorescens P60 konsentrasi 200% sebesar 28,5%. 3) Perlakuan metabolit sekunder P. fluorescens P60 meningkatkan tinggi tanaman, jumlah daun, panjang akar, bobot segar tanaman, bobot kering tanaman, dan kandungan klorofil daun masing-masing sebesar 1-3, 2-6, 19-27, 17, 57-67, dan 25% dibanding dengan kontrol.

Abtrak (Bhs. Inggris)

This study aims to 1) determine the effect of secondary metabolite application of P. fluorescens P60 in degrading residues of the herbicide glyphosate in the soil, 2) analyzing the content of glyphosate compounds in the soil after application, 3) determine the effect of secondary metabolite application of P. fluorescens P60 on plant growth in soil contaminated with remedied glyphosate herbicide residues. This research was conducted from November 2020 to March 2021 at the Screen House and the Plant Protection Laboratory of the Faculty of Agriculture, Jenderal Soedirman University. The experimental design used was a Randomized Block Design (RBD) with five treatments, namely soil contaminated with the herbicide glyphosate without application of secondary metabolite P. fluorescens P60, and application of secondary metabolite P. fluorescens P60 with concentrations of 50, 100, 150, and 200% with 5 replications. The variables observed were residual levels of the herbicide glyphosate in maize analyzed at the Center for Plant Seeds and Plant Protection Surabaya, plant height, the number of leaves, root length, plant fresh weight, plant dry weight, and chlorophyll content. The results showed that 1) Application of secondary metabolite P. fluorescens P60 was able to reduce residual levels of the herbicide glyphosate in the soil. 2) The best reduction in glyphosate herbicide residues occurred in the treatment of secondary metabolite application of P. fluorescens P60 at a concentration of 200% at 28,5%. 3) Treatment of secondary metabolites P. fluorescens P60 increased plant height, number of leaves, root length, plant fresh weight, plant dry weight, and leaf chlorophyll content by 1-3%, 2-6%, 19-27%, 17%, 57-67% and 25% respectively compared to control.

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