Electronic Theses and Dissertation

Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh residu jenis biochar terhadap pertumbuhan dan produksi kangkung pada musim tanam kedua, serta suhu, kelembaban, dan pH tanah. Penelitian ini dilaksanakan di Biochar Research Station, Pusat Riset Biochar dan Hutan Tropis, Universitas Syiah Kuala, Banda Aceh. Penelitian dilaksanakan pada bulan Juli sampai bulan Agustus 2024. Penelitian ini menggunakan Rancangan Acak Kelompok pola non faktorial yang terdiri dari 5 taraf perlakuan, dengan 5 ulangan sehingga terdapat 25 unit percobaan. Faktor yang diteliti yaitu residu jenis biochar yang terdiri atas kontrol tanpa biochar), biochar limbah kayu 500 g m-2, biochar limbah kayu 1000 g m- 2, biochar limbah tempurung kelapa 500 g m-2, dan biochar limbah tempurung kelapa 1000 g m-2. Hasil penelitian menunjukkan perlakuan residu jenis biochar terhadap pertumbuhan dan produksi tanaman kangkung berpengaruh sangat nyata terhadap tinggi tanaman umur 15 HST dan berpengaruh nyata terhadap tinggi tanaman umur 10 HST. Residu jenis biochar terhadap pertumbuhan dan produksi tanaman kangkung lebih baik dijumpai pada tempurung kelapa dengan dosis 1000 g m-2. Perlakuan residu jenis biochar terhadap pH, kelembaban, dan suhu tanah berpengaruh sangat nyata terhadap kelembaban tanah 20 HST dan berpengaruh nyata terhadap kelembaban tanah 0 HST. Residu jenis biochar terhadap pH, kelembaban, dan suhu tanah lebih baik dijumpai pada limbah kayu dengan dosis 1000 g m-2 dan tempurung kelapa dengan dosis 1000 g m-2.

Kata Kunci: Biochar, Kangkung, Kesuburan lahan, Pertumbuhan, Produksi

Abstract. This study aims to determine the effect of biochar residue types on the growth and production of kale in the second growing season, as well as temperature, humidity, and soil pH. This research was conducted at Biochar Research Station, Center for Biochar and Tropical Forest Research, Syiah Kuala University, Banda Aceh. The research was conducted from July to August 2024. This study used a non-factorial pattern Randomized Group Design consisting of 5 levels of treatment, with 5 replicates so that there were 25 experimental units. The factors studied were biochar residues consisting of control (no biochar), wood waste biochar 500 g m-2, wood waste biochar 1000 g m-2, coconut shell waste biochar 500 g m-2, and coconut shell waste biochar 1000 g m-2. The results showed that the treatment of biochar residues on the growth and production of kangkung plants had a very significant effect on plant height at 15 DAP and a significant effect on plant height at 10 DAP. Biochar type residues on the growth and production of kangkung plants are better found in coconut shells at a dose of 1000 g m-2. The treatment of biochar type residues on soil pH, moisture, and temperature has a very significant effect on soil moisture 20 DAP and a significant effect on soil moisture 0 DAP. Biochar type residues on soil pH, moisture, and temperature are better found in wood waste at a dose of 1000 g m-2 and coconut shell at a dose of 1000 g m-2. Keywords: Biochar, Kangkung, Land fertility, Growth, Production