Land for forage planting is mainly on marginal land such as acid soil. However, the constraint is the low levels of phosphorus (P) that can inhibit forage production. Arbuscula mycorrhizal fungi has been known as a biological fertilizer because the fungi can help the absorption of phosphorus (P) on the root so that can improve the forage production and quality of nutrients. This study was aimed to utilize and evaluate the use of arbuscular mycorrhizal fungi inoculum in forage production and nutritive value of Pennisetum purpureum. The experiment used a completely randomized design with two factors (2 x 4) and 4 replications. The first factor was type of AMF inoculum (A and B) and the second factor was doses of AMF (D1= 0.5 kg/planting hole, D2= 1 kg/planting hole, D3= 1.5 kg/planting hole, and D4= 2 kg/planting hole). Control treatment was carried out separately. The result showed that the highest shoot dry weight production was on AD2 and significantly different (P<0.05) from BD1 and control. There was no interaction between type and dose of inoculum on shoot dry weight production and nutrition value. The inoculum A significantly increased (P<0.05) shoot dry weight production (34.04%), crude protein content (10.21%), phosphorus uptake (40%), N content (10.53%), N uptake (38.10%), and protein production (40.15%) of P. purpureum, compared to inoculum B. It can be concluded that AMF inoculum type A was the best inoculum for forage production.
Hijauan pakan mempunyai peranan penting dalam keberhasilan usaha sistem peternakan sapi perah. Peternak di KUNAK Bogor memenuhi kebutuhan hijauan pakannya dari hijauan pakan yang dibudidayakan maupun dari hijauan pakan liar yang diambil dari sekitarnya. Sehubungan dengan kualitas hijauan pakan salah satunya ditentukan oleh jenis tanamannya, pemilihan jenis hijauan pakan sangatlah penting. Penelitian ini bertujuan untuk melihat keragaman hijauan pakan yang ada di KUNAK dan beberapa kualitas hijauan pakan berupa protein kasar (PK )dan serat kasar (SK). Penelitian dilakukan melalui survey lapangan dan pengambilan sampel hijauan pakan untuk dilakukan identifikasi dan dianalisa PK dan SK-nya. Komposisi botani tiga terbanyak di KUNAK 1 adalah rumput Ottochloa nodosa, Brachiariaruziziensis, dan Pennisetum purpureum, sedangkan komposisi botani di KUNAK 2 adalah Pennisetum purpeureum Schum, Ottochloa nodosa dan Euleusine indica . Sedangkan hasil analisa PK dan SK pada Ottochloa nodosa (PK : 9,1%; SK : 28 %), Brachiaria ruziziensis (PK: 7,4%; SK: 25,4%), dan Pennisetum purpureum (PK: 8,6%; SK: 30,7%). Kata kunci: tanaman hijaun pakan, KUNAK, komposisi botani, Pennisetum purpeureum, Ottochloa nodosa
ABSTRAKAlfalfa (Medicago sativa L.) merupakan salah satu leguminosa dengan kandungan nutrisi tinggi dengan tingkat palatabilitas yang baik pada ternak ruminansia. Kendala ketersediaan alfalfa di Indonesia adalah terbatasnya kemampuan adaptasi tanaman alfalfa di lingkungan tropis. Tujuan penelitian adalah mengukur tingkat adaptasi tanaman alfalfa (Medicago sativa L.) hasil mutasi dengan sinar gamma pada skala lapang. Penelitian terdiri dari 4 macam sumber tanaman, yakni tanaman hasil mutasi dengan level sinar gamma yang berbeda (0 Gy, 200Gy, 300Gy dan 400 Gy). Jumlah anakan tanaman diuji dengan rancangan acak lengkap dengan 3 ulangan dan masing-masing ulangan terdiri dari 20 tanaman. Daya tumbuh, warna daun, waktu berbunga dan tingkat serangan hama tanaman dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa tanaman alfalfa hasil mutasi 300 Gy nyata (p<0.05) menghasilkan jumlah anakan terbanyak. Tanaman hasil iradiasi 300 Gy memberikan perilaku yang lebih baik terhadap daya tumbuh, daya berbunga dan jumlah tanaman tidak terserang hama. Semakin tinggi level iradiasi sinar gamma terhadap warna daun, menunjukkan perubahan tingkat warna dari hijau tua menuju hijau muda.Kata kunci: alfalfa (Medicago sativa L.), mutasi, iradiasi sinar gamma, skala lapang ABSTRACT Alfalfa (Medicago sativa L.) a high nutritious and palatability legume for ruminant. Constrain of alfalfa availability in Indonesia are due to the plant adaptability in tropical environment. Aim of the study was to measure the adaptation level of alfalfa that irradiated with gamma rays on a field scale. The study consisted of four types of plant sources, mutation plants with different gamma ray levels (0Gy, 200Gy, 300Gy and 400Gy). Plant tillers was analyzed with a complete randomized design with 3 replications, 20 plants per replication. Growth capability, leaf color, flowering time and pest attack level were analyzed descriptively. The results showed that alfalfa irradiated with 300 Gy significantly (p<0.05) produced highest tillers. Irradiated 300 Gy plant gave better result on growth capability, flowering capability, and number of not attack plant from pests. The higher level of gamma ray irradiation showed the changed in leaf color levels from dark green to light green.
Asystasia gangetica (L.) T. Anderson has potency to spread as a forage in plantation area. The aim of this study was to evaluate A. gangetica viability rate with different storage conditions. The research was conducted from March to April 2019 at Laboratory of Forage Science and Pasture Technology, Faculty of Animal Science, IPB University. These research used 600 cutting stems of 70 days old A. gangetica from IPB areas. The experimental design used was a factorial completely randomized and the factors were A: storage material/tools (control, refrigerator, sugar immersion and wax coating) and B: storage time (1, 2, 3, 4, 5, 6 days) with 25 replicates. The measured parameters were physiological cutting stem, length, weight reduces, viability rate and leaves growth. Data were analyzed by ANOVA used software R-3.3.2., then the significant results analyzed by Duncan. The result showed that storage treatments affected cutting stem physiologically, i.e.: color, smell, mold appearance and texture. The most affected was sugar immersion and the less affected was the refrigerator. The length of storage time reduced cutting stem weight. However, the highest viability rate of the cutting stem was in sugar immersion storage. Key words: Asytasia gangetica (L.) T. Anderson, cuttings stem, preservation, storage capacity, viability
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