Electronic Theses and Dissertation

Sawi (Brassica juncea L.) merupakan jenis sayuran yang digemari oleh masyarakat Indonesia. Kelebihan sawi mampu tumbuh baik di daratan rendah maupun daratan tinggi. Sawi mempunyai nilai ekonomi tinggi setelah kubis krop, kubis bunga, dan brokoli. Biochar merupakan padatan arang tinggi karbon (C) hasil konversi biomassa diproses dengan pembakaran tidak sempurna dan minimum oksigen (pirolisis). Penggunaan biochar pada tanah diyakini mampu meningkatkan sifat kimia tanah. Penambahan bahan organik ke dalam tanah akan memperbaiki struktur tanah sehingga meningkatkan serapan unsur hara N, P, dan K oleh tanaman sawi. Penelitian ini dilakukan untuk melihat pengaruh pemberian biochar sabut kelapa terhadap serapan hara tanaman sawi varietas Samhong King. Penelitian disusun menggunakan Rancangan Acak Kelompok (RAK) pola faktorial yang terdiri dari dua faktor. Faktor perlakuan lama inkubasi biochar sabut kelapa yang terdiri dari 4 taraf yaitu kontrol, 2 minggu, 4 minggu, dan 6 minggu. Faktor perlakuan dosis pupuk organik cair yang terdiri dari 4 taraf yaitu 1 ml/liter air, 2 ml/liter air, 3 ml/ liter air, dan 4 ml/liter air. Hasil penelitian menunjukan bahwa pemberian biochar sabut kelapa dan pupuk organik cair tidak berpengaruh nyata terhadap jaringan tanaman dan serapan hara tanaman sawi Samhong King namun cenderung tertinggi dijumpai pada hara K, diikuti oleh serapan hara P dan N. Lama inkubasi biochar sabut kelapa dan pupuk organik cair tidak berpengaruh nyata terhadap produksi hasil tanaman sawi Samhong King namun cenderung tertinggi dijumpai pada perlakuan biochar sabut kelapa dengan periode inkubasi 6 minggu yaitu dengan produksi hasil 2,96 t ha-1. Pada perlakuan pemberian pupuk organik cair produksi hasil cenderung tertinggi dijumpai pada perlakuan 1 ml / liter air dengan produksi hasil 3,07 t ha-1
Kata kunci: Hara tanaman, Pembenah tanah, Sayuran

Mustard greens (Brassica juncea L.) are a type of vegetable that is popular with Indonesian people. The advantage of mustard greens is that it can grow both in lowland and highland areas. Mustard greens have high economic value after cabbage, flowering cabbage and broccoli. Biochar is a high carbon (C) charcoal solid resulting from biomass conversion processed by incomplete combustion and minimum oxygen (pyrolysis). The use of biochar in soil is believed to be able to improve the chemical properties of the soil. Adding organic matter to the soil will improve the soil structure thereby increasing the uptake of the nutrients N, P and K by mustard plants. This research was conducted to see the effect of providing coconut fiber biochar on the nutrient uptake of Samhong King mustard variety plants. The research was structured using a factorial Randomized Group Design consisting of two factors. The treatment factor is the incubation time for coconut fiber biochar, which consists of 4 levels, namely control, 2 weeks, 4 weeks and 6 weeks. The treatment factor for liquid organic fertilizer dosage consists of 4 levels, namely 1 ml/liter of water, 2 ml/liter of water, 3 ml/liter of water, and 4 ml/liter of water. The results of the study showed that the application of coconut fiber biochar and liquid organic fertilizer did not have a significant effect on plant tissue and nutrient uptake of Samhong King mustard greens, but tended to be highest in K nutrients, followed by P and N nutrient uptake. Incubation time for coconut fiber biochar and liquid organic fertilizer had no real effect on the production of Samhong King mustard greens but tended to be the highest in the coconut fiber biochar treatment with an incubation period of 6 weeks, namely with a yield production of 2.96 t ha-1. In the treatment of applying liquid organic fertilizer, the highest yield tended to be found in the treatment of 1 ml/liter of water with a yield production of 3.07 t ha-1. Keywords: Plant nutrients, Soil improver, Vegetables