PENGARUH KOMBINASI NUTRISI ANORGANIK DAN PUPUK HAYATI TERHADAP POPULASI Azotobacter sp, KANDUNGAN KLOROFIL, SERAPAN N, DAN HASIL TANAMAN TOMAT PADA SISTEM HIDROPONIK

Abstract

Budidaya hidroponik belum efisien untuk digunakan, salah satu penyebabnya adalah tingginya kebutuhan
nutrisi. Pemanfaatan pupuk hayati diharapkan bias mengefisiensikan penggunaan nutrisi dan meningkatkan
produktivitas tanaman tomat Tujuan penelitian ini untuk mengetahui pengaruh kombinasi nutrisi anorganik dan
pupuk hayati terhadap populasi Azotobacter sp, serapan N, kandungan klorofil, dan hasil tanaman tomat pada
sistem hidroponik. Penelitian ini dilakukan pada bulan Agustus – November 2017 di Rumah Kaca Kebun
Percobaan Ciparanje Universitas Padjadjaran, Jatinangor, Kabupaten Sumedang, Jawa Barat. Metode penelitian
ini menggunakan rancangan acak kelompok (RAK). Kombinasi perlakuan terdiri atas rekomendasi nutrisi
anorganik dengan konsentrasi 100%, 75%, dan 50% dan rekomendasi pupuk hayati 100%, 75%, 50%, dan 25%.
Variabel yang diamati meliputi populasi Azotobacter sp, kandungan klorofil, serapan N, jumlah buah tomat dan
bobot buah tomat. Hasil penelitian ini menunjukkan bahwa tidak terdapat pengaruh nyata pemberian nutrisi
anorganik dan pupuk hayati terhadap populasi Azotobacter sp, kandungan klorofil, serapan N, serta hasil tanaman
tomat. Pemberian perlakuan 50% nutrisi Anorganik + 100% pupuk hayati dapat meningkatkan bobot buah sebesar
40% dibandingkan pemberian 100% nutrisi anorganik.
Kata kunci: Azotobacter sp., klorofil, nutrisi anorganik, hydroponik, tomat
ABSTRACT
Hydroponic cultivation is not efficient because of its high demand for nutrients. Therefore, the utilization
of inorganic nutrients and biofertilizer is expected to improve the efficiency of nutrients uptake and increase the
productivity. The aim of research was to determine the effect of combination of inorganic nutrient dosage and
biofertilizer on the population of Azotobacter sp, N uptakes, chlorophyll content, and yield of tomatoes plantin
hydroponic systems. This experiment was conducted on August - November 2017 at GreenhouseExperiment
Garden Ciparanje Padjadjaran University, Jatinangor, Sumedang Regency, West Java. This research method
used Randomized Block Design (RBD). The treatment combination consisted of dosage recommendation of
inorganic nutrition with 100%, 75% and 50% concentrations, and 100%, 75%, 50%, and 25% of biofertilizer. The
variables observed included the population of Azotobacter sp, chlorophyll content, N uptake, number of tomatoes
and weight of tomatoes. The result of this study indicated that the effect of application both, inorganic nutrients
and biofertilizer did not significantly affect the population of Azotobacter sp, chlorophyll content, N uptakes, and
yield of tomatoes. The application of 50% Inorganic nutrition + 100% of biofertilizer increased fruit weight by
40% compared to 100% of inorganic nutrients.
Keywords: Azotobacter sp., chlorophyll, biofertilizer, hydroponic, tomato