A research was conducted to study the effect of nitrogen and potassium (NK) fertilizers and plant density on the growth and yield of taro (Colocasia esculenta (L.) Schott var. Antiquorum). The field experiment was carried out at Brawijaya University experimental field station located at Jatikerto, Malang, Indonesia. The experimental treatments consist of three plant density (18,000, 24,000 and 30,000 haG
Umbi talas termasuk kelompok tanaman umbi-umbian yang mempunyai peran penting sebagai sumber bahan pangan yang sehat dan aman. Akibatnya, permintaan terus meningkat. Namun demikian, produktivitasnya masih rendah daripada potensinya yang telah mencapai 20,7 ton ha-1. Oleh karena itu, perlu adanya peningkatan, dan salah satu cara yang dapat dilakukan adalah melalui aplikasi mulsa. Penelitian yang bertujuan untuk mendapatkan informasi tentang tingkat ketebalan mulsa jerami yang tepat pada budidaya tanaman talas telah dilakukan di Kebun Percobaan Universitas Brawijaya Malang. Penelitian menggunakan rancangan lingkungan Acak Kelompok dengan enam tingkat ketebalan mulsa sebagai perlakuan, yaitu : kontrol, ketebalan mulsa 1,5 cm, 3,0 cm, 4,5 cm, 6,0 cm dan 7,5 cm. Pengumpulan data dilakukan secara destruktif. Uji F taraf 5% ditujukan untuk menguji pengaruh perlakuan, sedang perbedaan diantara perlakuan didasarkan pada nilai BNT taraf 5%. Hasil penelitian menunjukkan bahwa pertumbuhan dan hasil tanaman talas serta lingkungan mikro yang lebih baik didapatkan pada ketebalan mulsa 4,5 cm – 7,5 cm. Tetapi yang lebih efektif dan efisien didapatkan pada penggunaan mulsa ketebalan 6 cm dengan hasil sebesar 10,54 ton ha-1 dan B/C 1,76.Tuber of taro plays a significant role as healthy and safe food resources. As a result, its demand has increased recently. However, the level of taro tuber productivity is still low than the potential outcomes that can achieve up to 20 tons ha-1. Therefore, it is necessary an improvement, one of them is through the application of mulch. Research aimed to find the proper thickness of straw mulch was conducted at UB experimental field located in Jatikerto, Malang. The study used randomized complete block design with thickness of straw mulch as the treatment, consisted of 6 levels, i.e: no mulch, straw mulch of 1.5 cm, 3 cm, 4.5 cm, 6 cm and 7.5 cm. Data was collected destructively. F test at 5% was used to determine the effect of treatment, while differences between treatments were referred to BNT at 5%.The results showed that the growth and yield of taro and better microenvironment found in mulch thickness of 4.5 cm - 7.5 cm. However, a more effective and efficient yield obtained on the use of mulch thickness of 6 cm with a yield of 10.54 ton ha-1 and B/C 1.76.
Diversifikasi pangan merupakan langkah tepat untuk mengantisipasi kondisi rawan pangan. Hal ini menjadi penting karena setiap tahun luas lahan basah telah mengalami penyusutan sekitar 0,1% dari total luas lahan di Indonesia. Sehubungan dengan hal tersebut, dan dalam upaya untuk memenuhi kebutuhan pangan nasional, maka pemanfaatan ubi jalar sebagai sumber bahan pangan alternatif perlu dilakukan. Penelitian yang bertujuan untuk mendapatkan informasi tentang macam dan waktu aplikasi bahan organik yang tepat telah dilakukan di Desa Landungsari, Kabupaten Malang. Rancangan yang digunakan adalah Petak Terpisah, macam bahan organik ditempatkan pada petak utama, terdiri dari 3 macam, yaitu pupuk kandang sapi, kompos azolla dan kompos sampah kota. Waktu aplikasi bahan organik sebagai anak petak, terdiri dari 3 macam, yaitu : 30 hari sebelum tanam, 15 hari sebelum tanam dan bersamaan tanam. Pengumpulan data dilakukan secara destruktif, meliputi komponen pertumbuhan dan panen, analisis pertumbuhan tanaman dan analisis tanah. Uji F taraf 5% ditujukan untuk menguji pengaruh perlakuan, sedang perbedaan diantara rata-rata perlakuan didasarkan pada nilai BNT taraf 5%. Interaksi nyata terjadi pada sebagian besar parameter yang diamati, dan hasil umbi tertinggi didapatkan pada kompos sampah kota yang waktu aplikasinya dilakukan 30 hari sebelum tanam : 28,03 ton umbi ha-1. Food diversification is a precise step to anticipate food shortage condition. It becomes important because wetland area is decreasing of approximately 0,1% each year of total area in Indonesia. Related to that point, also in order to meet food national demand, utilization of sweet potato as alternative food resource needs to be done. Research aimed to get information about proper kind and application time of organic matter had been done at Landungsari, Malang. The design used was Split Plot, kind of organic matter was placed as main plot, consisting of 3 kinds, ie: cow manure, azzola compost, and urban waste compost. Application time was set as subplot, consisting of 3 times, ie: 30 days before planting, 15 days before planting, and simultaneous with planting. Data collection was carried out destructively, including growth and yield components, plant growth analysis and soil analysis. F test on 5% level intended to test treatment effect, meanwhile difference between mean values based on LSD 5%. Real interaction occurred on almost all parameters observed, moreover the highest tuber yield was on urban waste compost which time application was 30 days before planting : 28,03 ton tuber ha-1.
Sweetpotato weevil Cylas formicarius Fabricius is major obstacle in increasing of sweet potato production in various countries. Tuber damage due to C. formicarius causes yield loss up to 80%. This study aims to examine the integration control of C. formicarius in entisol, each control combination was composed of various components. The control integration was composed of various components of synthetic insecticide, application of entomopathogenic fungus Beauveria bassiana, weeding, turning of the stems, heap up, and cover mounds using plastic mulch. The study used a randomized block design, each treatment was repeated five times. The research was conducted at Kendalpayak experimental station from May to September 2017. The result showed that P5 with B. bassiana application five times, addition of 3 t/ha organic fertilizer, cover mounds by plastic mulch was most effective in suppressing of C. formicarius in endemic entisol. The tuber weight at control combination (P5) was reached 23 t/ha or 56% higher than control combination of farmer cultivation (P1) was only 10 t/ha. The entisol land with an alluvial structure cracks easily during in the dry season, so that adults to penetrate the base of tubers and lay their eggs. The results of this study indicate that control combination of P5 can be recommended as a innovation control technology of C. formicarius in endemic entisol.
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