Penggunaan Spermin dalam Regenerasi Tanaman pada Kultur Antera Beberapa Aksesi Padi Gogo

The objective of the research was to determine anther culture ability of 7 rice accessions in an improved media supplemented with spermine. The seven accessions were Hawara Bunar, Grogol, Sigundil. Krowal. CT-650-24-J-3. Lembayau, dan Mendali. Media N6 was used for callus induction and MS was used for regeneration. Both media was supplemented with spermine at J0 -4M . Result of the experiment showed that Grogol. Sigundil. and Lembayau gave green plantlet. Sigundil and Mendali possessed highest anther culture ability and therefore best suited for parent in rice breeding involving anther culture technique

Pertumbuhan Bibit Tanaman Jarak Pagar (Jatropha Curcas L.) pada Berbagai Kedalaman dan Posisi Tanam Benih

Germination and growth at seedling stage are critical phases in plant life cycle, especially for physic nut (Jatropha curcas L.) usually grown in a dry land. Therefore seedling preparation plays an important role in nursery stock production. Position and depth of seed sowing affected the germination process and further seedling growth and development. A Completely Randomized Design with two factors was used in the experiment, i.e., depth of seed sowing (1, 2, 3, 4, and 5 cm) and seed position (seed with micropyle at the bottom, face-down, and layback). The result showed that position and depth of seed sowing affected the germination and early growth and development of seedling. The effect of seed position on growth and development of seedling persisted until the end of the experiment when the seedlings were two months old. Face-down position with 2 - 3 cm depth represented the best position and depth for seedling growth

Pengujian Varietas dan Dosis Pupuk untuk Meningkatkan Pertumbuhan dan Hasil Ratun-padi di Sawah Pasang Surut

Test of Rice Varieties and Fertilizer Dose for Increasing Yield of Rice Ratoon in Tidal Swamp Land. The main cause of low productivity of rice in the tidal swamp land is a high level of soil acidity and toxicity of pyrite. To improve the productivity of rice per season in tidal swamp land is to establish the ratoon. The experiment was conducted in type B tidal swamp land, Dadahup A-2 village, Kapuas District, Central Kalimantan. The objectives of this study were (a) to determine the effect of doses of fertilizers combined with water-logging after cutting, (b) to obtain technology information to enhance the ratoon yield, and (c) to produce recommendations of the farming system in tidal swamp land. The experiment was arranged in a split plot design with three replications. The main plots were five rice varieties, i.e. IR42, Batanghari, Ciherang, Intani-2, and Batang Samo, while subplots were two levels of doses fertilizers, i e. half doses of the main crops (N1 = 75 kg Urea, 50 kg SP-36 and 50 kg of KCl per hectare) and one quarter doses of the main crops (N2 = 37,5 kg of Urea, 25 kg SP-36 and 25 kg of KCl per ha). The results of the experiment indicated that application of fertilizers with a half dose of the main crops increased the grain per panicle, number of filled grain and yield, that was higher than a quarter doses of the main crops. Batang Samo variety was the most responsive to fertilization with higher doses, while Intani-2 variety was responsive to a lower dose of the fertilizer. Batanghari was superior variety with the highest yield of ratoon both a half doses fertilization and a quarter of the main crops. Based on the farming analysis, the ratooning system is very feasible in the tidal swamp lands because it can increasing productivity ± 2.4 – 2.7 t/ha. Salah satu upaya untuk meningkatkan produktivitas padi di lahan pasang surut adalah dengan memanfaatkan ratun. Penerapan budidaya padi dengan sistem ratun, dapat memberikan tambahan produksi 40-60% per musim tanam, hemat input, biaya, tenaga dan waktu. Suatu penelitian dilaksanakan di lahan pasang surut tipe B, Dadahup A-2, Kabupaten Kapuas, Kalimatan Tengah, mulai bulan Juni 2007 sampai Januari 2008. Penelitian bertujuan untuk : (a) mengetahui pengaruh dosis pupuk dan penggenangan air setelah panen tanaman utama, (b) mendapatkan informasi teknologi untuk meningkatkan potensi ratun, dan (c) menghasilkan rekomendasi USAhatani dengan sistem ratun di lahan pasang surut. Percobaan menggunakan rancangan petak terpisah dengan tiga ulangan. Petak utama terdiri atas lima varietas padi, yaitu : IR42, Batanghari, Ciherang, Intani-2, dan Batang Samo. Anak petak terdiri atas dua takaran dosis pemupukan, yaitu : setengah dari dosis tanaman utama (N1 = 75 kg Urea, 50 kg SP-36 dan 50 kg KCl per ha) dan seperempat dari dosis tanaman utama (N2 = 37.5 kg Urea, 25 kg SP-36 dan 25 kg KCl per hektar). Ratun yang dipupuk dengan perlakuan N1 menghasilkan jumlah gabah per malai, jumlah gabah isi dan hasil yang lebih tinggi dibandingkan dengan perlakuan N2. Varietas Batang Samo paling responsif tehadap pemupukan dengan dosis tinggi, sedangkan varietas Intani-2 paling responsif terhadap pemupukan dengan dosis rendah. Varietas Batanghari merupakan varietas terbaik yang mampu memberikan hasil ratun tertinggi, baik pada perlakuan N1 maupun N2. Usahatani dengan sistem ratun layak diusahakan di lahan pasang surut karena mampu memberikan tambahan poduksi 2,4 – 2,7 t/ha

Pertumbuhan, Serapan Hara dan Kualitas Turfgrass pada Beberapa Dosis Pemberian Pupuk Hayati Mikoriza

The objective of the research was to study the effect of mycorrhiza dosage on nutrient uptake, growth and turfgrass quality. The research was conducted at IPB turfgrass experimental farm, Darmaga, Bogor. The experiment was arranged in randomized complete block design with four replications. The treatment consisted of five dosages of mycorrhiza (100, 200, 300, 400, and 500 g per pot). The result showed that application of mycorrhiza at 300 g per pot increased coverage area and dry weight of clipping, and decreased vertical height, but it did not significantly increase nutrient uptake and quality of turfgrass compared to control

Efek Suhu Simpan dan Pelapis terhadap Perubahan Kualitas Buah Pisang Cavendish

The objective of the experiment was to determine the effect of coating materials and storage temperatures in inhibiting the ripening process of banana fruits. The experiment consisted of two factors namely storage temperatures (ambient and cool) and coating materials (control, Carnauba wax, bee wax, and Sempefresh). One experimental unit consisted of two fingers of banana. The experiment was replicated three times. Observation was conducted on the following variables: peel color development, weight loss, fruit softening, ratio of flesh and peel weight, sugar content, and titratable acidity. Result of the experiment showed that carnauba wax 6 % inhibited weight loss, fruit softening, and the increase of flesh and peel weight ratio. Bee wax inhibited fruit softening, peel color development and sugar content. Fruit treated with carnauba wax 6 % could be stored at cool temperature for 25.9 days, 10.5 days longer than untreated fruit stored at ambient temperature. Among the three coating materials, Sempefresh had the lowest effectiveness in inhibiting bananaf ruit ripening process