No abstract

This study determines generative growth characteristics of alfalfa in second regrowth with the addition of dolomite and extended photoperiod. This study used a completely randomized design tested via Least Significant Difference. Dolomite was added at 0, 6 and 12 ton/ha. Photoperiod was varied at 12, 14 and 16 hours. The results conclude that extended photoperiod promoted alfalfa growth. Lengthier exposure to lighting promoted faster flowering and greater proportions of pod emergence and pod ripening. The addition of dolomite levels did not affect generative growth, except in the percentage of pods per plants. The addition of 16-hour lighting duration improved the second regrowth stage of alfalfa as compared to 14 and 12-hour photoperiods. The result yielded 61.63% seed purity and 13.33% seed viability.

The study was conducted to identify the effect of lighting duration and dolomite addition on the vegetative growth of alfalfa plants in second regrowth phase. The experiment was conducted in the greenhouse of the Laboratory of Forage and Pasture Science, Faculty of Animal Science, Universitas Gadjah Mada. It used a completely randomized design with 3x3-factorial using two factors and three replications. The first factor was lighting duration (C) with 3 levels (C0 = 12 hours, C1 = 14 hours, and C2 = 16 hours). The second factor was dolomite addition (D) with 3 levels (D0 = 0 ton/ha, D1 = 6 ton /ha, and D2 = 12 ton/ha). The results showed a significant effect so Duncan Multiple Range Test (DMRT) followed at 5% and 1% levels. The observed variables were plant height, the number of plant branches, the number of plant leaves, fresh forage production, and the chemical content of the plants in the form of dry matter (DM) and organic matter (OM). The addition of dolomite significantly affected the number of the plant branches, the number of plant leaves and the dry matter of the plants. A significant correlation was found between the two treatments and the number of leaves (C2D2) and a correlation was between the treatment and dry matter (C1D2).

No abstract

This study aimed to determine the effect of organic and inorganic fertilizers on the cultivation of tropical weed Synedrella nodiflora as forage. The study was conducted from May to July 2018. The treatments of the research were control (C), organic fertilizer (D) and organic fertilizer + urea (DU), with 3 replications that were arranged on experimental design with a completely randomized design, in a unidirectional pattern and continued with least significant different (LSD). Organic fertilizer dosage in this study was 5 tons/ha, while urea fertilizer was 350 kg/ha, with plant spacing was 45x60 cm. The observed parameters were plant height, forage production and chemical composition (5 weeks after planting). Plant height of C, D and DU were 41.59, 47,42, and 50.59 cm respectively. Forage production of dry matter after 5 weeks planting at C, D and DU were 1.69, 1.70 and 2.91ton/ha, with in vitro digestibility values ranging from 51.68 to 57.70% (IVDMD) and 51.71 to 61.98% (OMD) respectively. The chemical composition of native S. Nodiflora were 12.32% of dry matter (DM), 62.45% TDN count for cattle and 67.42% TDN count for sheep. Based on DM, The organic matter was 84.46%, crude protein 20,11%, crude fiber 13.26%, extract ether 7.77%, and nitrogen free extract 37.08%. The combination of organic fertilizer and urea increased the height and fresh and dry matter production S. nodiflora.

No abstract

Climate changes due to global warming affect the productivity of forage crops such as maize. However, the productivity of maize could be maximized by improving the plant’s adaptation and tolerance through breeding, using tissue culture. This study aims to determine the effect of explant types and light conditions on callus induction of srikandi putih maize. It was conducted at the Laboratory of Forage and Pasture Science, Faculty of Animal Science, Universitas Gadjah Mada, Yogyakarta. Furthermore, it was carried out using a completely randomized design in a factorial pattern. There were two treatment factors namely explant types, which consisted of roots, stems, and leaves, and light conditions consisting of darkness and light. The results showed that callus induction occurred in the stem and root of explants at 60%, but not in the leaves. It also showed that the stem explants produced a higher fresh weight of callus at 239.6 mg compared to the roots which produced 77.6 mg. The dark condition also produced a 49.3% higher amount of callus with fresh weight of 115.1 mg. Meanwhile, the light condition produced 30.7% higher amounts of callus with fresh weight of 96.3 mg. It was concluded that all treatments showed a compact texture of callus, but the use of stem explants in dark conditions was the best treatment.

No abstract