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The response of growth two clone of tea (Camellia sinensis) with coconut water application after centering Ai Yanti Rismayanti; Santi Rosniawaty; Sumadi Sumadi
Jurnal Penelitian Teh dan Kina Vol 20 No 2 (2017)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v20i2.132

Abstract

Vegetative stage is an essential element for plants that shoot harvested. At that stage, the growth regulator application can directly increase the production quantively accelerate the potential formation and growth of roots and shoots. Coconut water is one of a  natural sources of growth hormone that has a potency to increase the early growth of the tea plant. This experiment aimed to find out the response of tea plant growth on the lowlands after centering with coconut water application. This experiment was conducted in experimental garden of Faculty of Agriculture Unpad, Jatinangor, Sumedang at an altitude of 750 m above sea level and Inceptisol terrestrial soil. The experiment began in February 2016 until June 2016 using Split Plot Design, consisting of two factors and three replications. The main plot is a type of clone (K) which consists of two levels, namely: k1 = GMB 7, k2 = GMB 11. Sub plot is a coconut water concentration (A) consisting of five levels: a0 = coconut water application (control), a1 = coconut water concentration 25%, a2 = coconut water concentration 50%, a3 = coconut water 75% concentration, a4 = coconut water 100% concentration. The experimental results showed that coconut water had a significant effect on all treatments. The interaction of plant height variable at 14 WAC - 16 WAC (Week After Centering), canopy width at 12 WAC - 16 WAC and stem diameter at 14 WAC - 16 WAC and no significant effect on plant height at 2 WAC - 12 WAC, canopy width at 2 WAC - 10 WAC, and stem diameter at 2 WAC - 12 WAC, at 2 WAC - 12 WAC. In general, GMB 11 clone tea plant that applied 75% coconut water performed the best growth response on tea growth in the lowlands after centering.
Pengaruh Dosis Dan Waktu Aplikasi Karbofuran Terhadap Serangan Nematoda Pada Perbenihan Kentang G1 Kultivar Granola Rama Adi Pratama; Ai Yanti Rismayanti; Lutfi Abdul Gani
Jurnal Agercolere Vol 6 No 1 (2024): Jurnal Agercolere Vol. 1 Numb 1, 2024, on progres
Publisher : Fakultas Pertanian Universitas Ichsan Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37195/jac.v6i1.224

Abstract

Penurunan produktivitas kentang salah satunya disebabkan oleh nematoda. Salah satu cara yang dapat dilakukan dalam pengendalian nematoda yaitu dengan menggunakan nematisida yang berbahan aktif karbofuran. Tujuan dari penelitian untuk mengetahui apakah terjadi interaksi dan pengaruh mandiri antara efektivitas dosis dan waktu aplikasi nematisida karbofuran terhadap serangan nematoda pada perbenihan kentang G1 kultivar Granola. Percobaan dilaksanakan di Desa Simpang Kecamatan Cikajang Kabupaten Garut dengan ketinggian tempat 1.200 meter di atas permukaan laut. Waktu penelitian dilaksanakan pada bulan April-Juni 2020. Penelitian menggunakan Rancangan Acak Kelompok (RAK) pola faktorial yang terdiri dari dua faktor dengan dua ulangan. Faktor pertama dosis nematisida karbofuran (K) terdiri atas empat taraf yaitu, k1: 0 g/tanaman, k2: 0,15 g/tanaman, k3: 0,30 g/tanaman dan k4: 0, 45 g/tanaman. Faktor kedua Waktu Aplikasi Nematisida (W) terdiri atas empat taraf w1: 1 MST, w2: 2 MST, w3: 3 MST, dan w4: 4 MST. Hasil penelitian menunjukkan terjadi interaksi antara dosis dan waktu aplikasi nematisida karbofuran terhadap parameter pengamatan jumlah umbi terserang dan tingkat kerusakan oleh nematoda. Terjadi pengaruh mandiri aplikasi dosis dan waktu aplikasi nematisida karbofuran terhadap efikasi karbofuran. Interaksi terbaik pada 0,45 g/tanaman (k4) dan 3 MST (w3) memberikan hasil yang paling sedikit untuk jumlah umbi terserang yaitu 0,250 umbi dan tingkat kerusakan oleh nematoda sebesar 2,52 %.