Respons Beberapa Varietas Nasional Gladiol Terhadap Pemupukan N Dan K

. Soedarjo, M. and S. Wuryaningsih. 2010. Response of Several Gladiolus Varieties on N andK Fertilizer Application. Nitrogen is one of the nutrients limiting the growth either vegetative or generative ofgladiolus, while potassium as a catalyst in the process of metabolism.A field experiment to evaluate the effect of Nand K fertilizers on the growth and development of three varieties of gladiolus was conducted at the experimentalgarden of The Indonesian Ornamental Crop Research Institute from June to December 2009. A split plot design withtwo replications was used. The main plot was three gladiolus varieties consisted of (1) Nabila, (2) Clara, and (3)Kaifa. The subplot was combinations of N and K fertilizers, namely (1) N10K10, (2) N10K20, (3) N10K30, (4) N20K10,(5) N20K20, (6) N20K30, (7) N30K10, (8) N30K20, and (9) N30K30. The Research results showed that there were interactionsbetween varieties and N K fertilizers on flower spike length and number of floret/spike. Nitrogen (N) and potassium(K), the macro nutrient that limits plant growth, and played a significant role in the quality of flowers and corms ofgladiolus, responses for each variety. Clara varieties was the most responsive to nitrogen fertilization, with fertilizerapplication of N30K10 produce longest flower stalks (73.16 cm), and highest number of class A corm (9.83). Fertilizerapplication N20K10 on Kaifa varieties produce the longest flower stalk and the largest flower number/spike. Nitrogenand Kalium fertilization could be implemented by considering the varity of gladiolus

Potensi Anggrek Dendrobium dalam Meningkatkan Variasi dan Kualitas Anggrek Bunga Potong

Dendrobium merupakan genus anggrek terbesar dari famili Orchidaceae. Genus anggrek ini merupakan kekayaan sumber daya genetik Indonesia yang banyak terdapat di kawasan timur, seperti Papua dan Maluku. Namun, sumber daya genetik tersebut belum dimanfaatkan secara optimal sebagai tetua dalam persilangan untuk menghasilkan keturunan yang memiliki karakteristik sesuai dengan yang diinginkan konsumen. Dari 20 seksi Dendrobium, barudua seksi yang digunakan sebagai induk silangan, yaitu seksi Phalaenanthe dan Ceratobium atau Spatulata. Kendala pengembangan anggrek di Indonesia antara lain adalah terbatasnya ketersediaan bibit unggul, teknologi yang digunakan masih sederhana, dan kurangnya dukungan kebijakan pemerintah

Studi Pengaruh Substitusi Hara Makro Dan Mikro Media MS Dengan Pupuk Majemuk Dalam Kultur in Vitro Krisan

Studi substitusi hara makro dan mikro media Murashige & Skoog (MS) menggunakan pupuk majemuk untuk meningkatkan efisiensi kultur in vitro krisan (Dendranthema grandiflora) dilakukan di Laboratorium Kultur Jaringan, Kebun Percobaan Cipanas, Balai Penelitian Tanaman Hias (Balithi) dari Bulan Januari hingga Desember 2010. Aplikasi pupuk majemuk sebagai substitusi hara makro-mikro MS diharapkan dapat menurunkan biaya produksi benih melalui kultur in vitro, khususnya dalam penyediaan media tanam. Penelitian bertujuan untuk mengetahui pengaruh varietas dan kombinasi pupuk majemuk dalam meningkatkan efisiensi aplikasi kultur in vitro krisan. Varietas yang diuji ialah D. grandiflora cv. Dwina Kencana dan Pasopati, sementara pupuk majemuk yang digunakan ialah Hyponex Hijau (20:20:20), Hyponex Merah (25:5:20), dan Growmore (32:10:10) dengan komposisi uji (1) media ½ MS + 0,1 mg/l indole acetic acid (IAA) sebagai kontrol, (2) 1 g/l Hyponex Hijau + 0,1 mg/l IAA, (3) 2 g/l Hyponex Hijau + 0,1 mg/l IAA, (4) 3 g/l Hyponex Hijau + 0,1 mg/l IAA 0,1, (5) 1 g/l Hyponex Merah + 0,1 mg/l IAA, (6) 2 g/l Hyponex Merah + 0,1 mg/l IAA, (7) 3 g/l Hyponex Merah + 0,1 mg/l IAA, (8) 1 g/l Growmore + 0,1 mg/l IAA, (9) 2 g/l Growmore + 0,1 mg/l IAA, dan (10) 3 g/l Growmore + 0,1 mg/l IAA. Percobaan disusun menggunakan rancangan acak kelompok pola faktorial dengan tiga ulangan. Hasil penelitian menunjukkan bahwa jenis varietas dan media kultur berpengaruh terhadap keberhasilan kultur in vitro krisan. Varietas Dwina Kencana memiliki respons pertumbuhan yang lebih baik dibanding varietas Pasopati. Konsentrasi 3 g/l Hyponex Hijau yang ditambah dengan 0,1 mg/l IAA merupakan medium pengganti medium ½ MS terbaik yang mampu mendukung pertumbuhan eksplan pada Dwina Kencana maupun Pasopati. Pada umur 8 minggu setelah kultur, perlakuan tersebut memberikan rerata terbaik jumlah daun, jumlah nodus, jumlah akar, panjang akar, dan berat basah planlet. Aplikasi medium tersebut mampu menekan biaya penyediaan medium kultur per liter hingga 34,7% dibanding biaya penyediaan medium ½ MS yang mencapai Rp6.561,00 per liter. Aplikasi hasil penelitian ini memberikan dampak positif terhadap efisiensi biaya produksi kultur in vitro krisan, khususnya terkait dengan penyediaan media kultur

Growth response of pigeon pea (

As an archipelago country, Indonesia is surrounded by abundant saline soils which could be potential for growing food crops. The research work was conducted to study the growth responses of some pigeon pea genotypes on saline soils. The genotypes of Pigeon pea (LG Kidul, Mega, 90024, 91043 and 94028), as treatment, were grown on Alfisol soil (non-saline) and on saline soil. The experiment was carried out using completely randomized design and replicated three times. All data observed were analyzed by employing standard deviation from 3 replicates. The results of present research work revealed a significant growth retardation of pigeon pea when grown on saline soil. All growth parameters, plant height, plant diameter, root dry weight, and shoot dry weight were significantly lower on saline soil than on Alfisol soil. High concentration of Na+ was observed in roots, shoots and leaves of pigeon pea indicating growth retardation and toxicity symptoms of pigeon pea on saline soil was due to Na+

The Growth Response Variability of Some Legume Species on Salinity

Abundant amount of saline soils provides possibility to increase farming acreage in Indonesia. Legume species are good sources of protein for Indonesian daily food. Among legumes species, some species could show more tolerant to salinity and could be potentially cultivated on saline soils. Our present research work was undertaken to evaluate the growth response of legume species to salinity. Alfisol and saline soils, as main factors, used in the study were combined factorially with six legume species (groundnut, soybean, pigeon pea, velvet bean, hyacinth bean and sword bean) as sub-factor. Each factorial treatment was arranged in randomized block designed and was replicated three times. The standard deviation (SD) analysis was used to analyse the effect of salinity to the growth of legume species. Plant height at 15 days after sowing (DAS) and at 50 DAS, shoot diameter at 50 DAS, root dry weight at 50 DAS, shoot dry weight at 50 DAS and leaf dry weight at 50 DAS varied among legume species on Alfisol and saline soils. In general, the plant growth of legume crops, measured as plant height, plant diameter, root dry weight, shoot dry weight and leaf dry weight, was significantly retarded by salinity at different degree. The growth reduction on saline soil was related to higher Na concentration in roots and leaves. The highest and the lowest degrees of retardation by salinity on root, shoot and leaf dry weights were observed on pigeon pea and groundnut, respectively. Soybean, velvet bean, and hyacinth bean showed the degree of growth retardation by salinity between pigeon pea and groundnut. Response to salinity of sword bean was comparable to groundnut. Thus, groundnut and sword bean could be cultivated on saline soil