Krisan merupakan salah satu tanaman hias penting dalam industri florikultura di Indonesia. Dalam budidayanya, pertumbuhan dan produktivitas krisan sangat dipengaruhi oleh pemberian pupuk yang sesuai dan optimal. Pupuk N, P, dan K sering diaplikasikan tanpa memperhatikan cara aplikasi dan takaran yang tepat. Penelitian bertujuan untuk mengetahui cara aplikasi dan takaran pupuk terhadap pertumbuhan dan produksi bunga krisan. Penelitian dilakukan di Kebun Percobaaan Balai Penelitian Tanaman Hias Segunung 1.100 m dpl. dari bulan Januari sampai dengan Desember 2007. Bahan tanaman yang digunakan adalah krisan varietas Puspita Nusantara. Pupuk yang digunakan yaitu Urea, KNO3, dan SP-36. Percobaan menggunakan rancangan petak terpisah dengan tiga ulangan. Petak utama ialah cara aplikasi pupuk butiran dan fertigasi. Sebagai anak petak ialah takaran pupuk, yaitu tanpa pupuk, ½ takaran anjuran, 1 takaran anjuran, dan 1½ takaran anjuran. Hasil percobaan menunjukkan bahwa pemberian pupuk dengan cara ditabur dan fertigasi memberikan pengaruh yang sama, sedangkan takaran pupuk 1½ takaran anjuran menunjukkan pertumbuhan vegetatif dan jumlah bunga lebih tinggi dibandingkan perlakuan lainnya (diameter batang terbesar 5,90 mm, panjang daun 8,41 cm, jumlah daun/tanaman tertinggi 37,5 helai, dan 10,5 kuntum/tanaman). <br /><br /><br /><br />Chrysanthemum is one of important ornamental crops on the floriculture industry in Indonesia. In Chrysanthemum cultivation, growth and productivity of it are significantly affected by application of appropriate fertilizer in optimal dosage. N, P, and K fertilizer were frequently applied without taking into consideration on its application method and appropriate dosage. The objective of this study was to determine effect of application method and dosage of fertilizer on plant growth and production of Chrysanthemum. The experiment was carried out at Segunung Field Experiment Station of Indonesian Ornamental Crops Research Institute 1,100 m asl. from January to December 2007. The material used in the experiment was Puspita Nusantara varieties. The fertilizer utilized in the study were Urea, KNO3, and SP-36. The treatments were arranged in split plot design with three replications. The main plot was application method of fertilizer i.e. spreading and fertigation. The subplot was without fertilizer, ½ recommended suggestion dosage, 1 recommended suggestion dosage, and 1½ recommended suggestion dosage. Results showed that application of fertilizer both spreading and fertigation gave the same effect on growth and production of Chrysanthemum. Fertilizer dosage at 1½ recommended suggestion gave higher effect on vegetative plant growth and number of flower than those others (highest stem diameter 5.90 mm, highest leaf length 8.41 cm, highest leaf number/plant 37.5 leaves, and 10.5 flowers/plant). <br /><br />
ABSTRAKMarigold merupakan tanaman herba hias yang saat ini mulai menjadi primadona serta memiliki nilai ekonomis yang cukup tinggi, oleh karena itu produktivitas dan kualitas bunga marigold perlu ditingkatkan. Cara pemberian serta jenis pupuk yang tepat menjadi salah satu hal yang perlu diperhatikan agar menjadi efektif terhadap tanaman Marigold. Tujuan dari penelitian ini adalah untuk mengetahui keefektifan penggunaan pupuk NPK dalam bentuk konsentrasi dan interval pemupukan terhadap pertumbuhan tanaman Marigold. Penelitian didesain dengan Rancangan Acak Kelompok (RAK) yang terdiri dari dua faktor. Faktor pertama merupakan konsentrasi pupuk NPK yang terdiri dari tiga taraf, yaitu tanpa pupuk (K0), 100 mg/liter air (K1), dan 150 mg/liter air (K2). Faktor kedua adalah interval pemupukan NPK yang terdiri dari 3 taraf, yaitu 1 kali/minggu (F1), 1 kali/2 minggu (F2), dan 1 kali/3 minggu (F3). Seluruh perlakuan diulang sebanyak 3 kali, sehingga didapatkan kombinasi perlakuan sebanyak 27 plot. Parameter pengamatan meliputi tinggi tanaman, jumlah daun, diameter batang, inisiasi bunga, diameter bunga, lama kesegaran bunga. Perlakuan konsentrasi 150 mg/liter air dengan interval pemupukan 1 kali/minggu menjadi input yang optimal untuk pertumbuhan tanaman Marigold.Kata kunci: marigold, konsentrasi, interval, pupuk
Deterioration of seeds during storage may reduce the supply of high-quality seeds which become the limiting factor of soybean production in tropical countries. Controlled Deterioration Test (CDT) is one of the fastest vigor testing methods. The objective of this study was to achieve the suitable moisture content and duration of CDT treatment in soybean seed, then establish a model that associated with the seed vigor in the field after a certain time of storage. Split-plot with 2 factors, namely seed varieties and the combination of moisture content and heat exposure duration were used to determine the influence of CDT treatment. Another split-plot for 2 factors, namely storage period and seed varieties were used to determine the effect of shelf life. Viability parameters were observed by germination strength (GS) and seedling vigor index (VI), using a rolled paper towel method. The results showed that there was an interaction between soybean seed varieties and the combination of seed moisture content treatment with duration of CDT exposure. Sindoro and Tanggamus varieties had higher viability and storability than other varieties. Combinations of 28% seed moisture content for 24 hours CDT duration were sensitive enough to evaluate the physiological potential of soybean seeds, providing information that was closely related to seed germination after stored for 1 month.
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