Electronic Theses and Dissertation

Abstrak. Tanaman kopi arabika merupakan tanaman C3, sehingga membutuhkan naungan sebagai pelindung dalam pertumbuhannya. Kesuburan tanah dan perkembangan daun merupakan faktor penting bagi tanaman. Penelitian ini menggunakan rancangan acak kelompok (RAK) non faktorial dengan yang diteliti yaitu konsentrasi hara daun dan sifat kimia tanah tanaman kopi arabika. Faktor jenis naungan terdiri dari lima jenis tanaman naungan yaitu tanpa naungan, lamtoro besar, lamtoro kecil, pisang, dan alpukat. Adapun parameter penelitian yang diamati yaitu konsentrasi hara N,P,K pada daun tanaman kopi arabika, pH tanah, C-Organik, N-Total, P-Tersedia, basa-basa dapat ditukar, kapasitas tukar kation, dan kejenuhan basa. Pengambilan sampel daun dilakukan dengan mengambil helaian daun pada 4 sampel tanaman kopi. Pengambilan sampel daun diambil pada daun ke-3 dari ujung cabang yang sedang tumbuh sebanyak 5 helai daun pertanaman kopi. Pengambilan sampel tanah dilakukan pada 4 sampel tanaman kopi yang ternaungi pada setiap satu tanaman naungan. Pengambilan sampel tanah diambil dalam radius 1 meter dari tanaman sampel dengan kedalaman 0 – 20 cm. Sampel tanah dikomposit dan diambil sebesar 1 kg tanah pada setiap satu tanaman naungan. Pengambilan sampel tanah diulangi sebanyak 4 ulangan pada setiap perlakuan jenis tanaman naungan. Hasil penelitian menunjukkan, pemberian perlakuan jenis naungan berbeda sangat nyata terhadap parameter konsentrasi hara kalium pada daun dan pH tanah serta berbeda nyata terhadap parameter kejenuhan basa pada tanaman kopi arabika. Hasil penelitian menunjukkan bahwa Jenis tanaman naungan pisang memilliki kemampuan terbaik dalam menyediakan unsur hara N, P, dan K pada tanaman kopi arabika. pisang juga memiliki karakteristik sifat kimia tanah yang lebih baik dibandingkan dengan lamtoro kecil, lamtoro besar, alpukat, dan kontrol.

Kata Kunci : Hara Tanaman, Kesuburan Tanah, Tanaman Perkebunan

Abstract. Arabica coffee plant is C3 plants, so they need shade as protection in their growth. Soil fertility and leaf development are important factors for plants. This study used a non-factorial randomized group design (RAK) with the studied leaf nutrient concentration and soil chemical properties of arabica coffee plants. The shade type factor consists of five types of shade, namely no shade, big lamtoro, small lamtoro, banana, and avocado. The research parameters observed were the concentration of N, P, K nutrients in the leaves of Arabica coffee plants, soil pH, C-Organic, Total-N, Available-P, exchangeable cations, cation exchange capacity, and base saturation. Leaf sampling was carried out by taking leaves on 4 coffee plants. Leaf sampling was taken on the 3rd leaf from the tip of the growing branch as many as 5 leaves per coffee plant. Soil sampling was carried out at 4 samples of shaded coffee plants at each shade plant. Soil samples were taken within a radius of 1 meter from the sample plants with a depth of 0-20 cm. Soil samples were composited and 1 kg of soil was taken from each shaded plant. Soil sampling was repeated as many as 4 replicates in each shade treatment. The results showed that the provision of shade treatment had a very significant effect on the parameters of potassium nutrient concentration in leaves and soil pH also had a very significant effect on the parameter of base saturation in Arabica coffee plants. The results showed that the type of banana shade plant has the best ability to provide N, P, and K nutrients to Arabica coffee plants. Banana also has better soil chemical characteristics compared to small lamtoro, big lamtoro, avocado, and control. Keywords : Plant Nutrient, Soil Fertility, Plantation