Bambang Suwignyo

Generative Plant Characteristics Alfalfa ( Medicago sativa L.) on Different Levels of Dolomite and Lighting Duration

This study aimed to determine the effect of dolomite and lighting duration on the generative characteristic performance of alfalfa plants. The experiment was conducted at Greenhouse of Forage and Pasture Science Laboratory, Faculty of Animal Sciences, Universitas Gadjah Mada, from May to September 2015. This study is designed with randomized complete block design (RCBD) factorial pattern of 3 × 3 with four replications. The first factor was the dose of dolomite (D) with three treatments (D0, without dolomite; D1, dolomite 90 g/plant or 6 t/ha; and D2, dolomite 180 g/plant or 12 t/ha). The second factor was the long lighting duration (C) with three treatments (C0, 12 h of lighting; C1, 14 h of lighting; and C2, 16 h of lighting). The parameters measured were the time of flowering, time of podding, the number of flowering plants, the number of podded plant, the number of pods per plant, seed weight per plant, and seed alfalfa viability test. The results showed that the treatment of lighting duration significantly affected (p < 0.05) the number of flowering plants, the number of podded plant, the number of pods per plant, and seed weight per plant alfalfa. Dolomite dose treatment significantly affected (p < 0.05) the number of pods per plant and seed weight per plant alfalfa. There was an interaction between lighting duration and dosage of dolomite that significantly affected the number of pods per alfalfa plant.

PRODUKTIVITAS TANAMAN KALIANDRA (Calliandra calothyrsus) SEBAGAI HIJAUAN PAKAN PADA UMUR PEMOTONGAN YANG BERBEDA

This research aimed to determine the production and nutrient content of calliandra (Caliandra calothyrsus) as a forage for ruminant in the different defoliation time. This research was conducted for 48 weeks (June 2012–June 2013) at Kaligesing forage feed area, Animal Science Department, Purworejo, Central Java. Design of the research was Completely Randomized Block Design. Soil slope was used as block. The research treatments were 6 (P1), 8 (P2), 12 (P3) and 16 (P4) weeks of cutting age. The grass of all treatment groups were cut together at the same day prior to experiment. Caliandra calothyrsus was cut at edible portion. Parameters measured were fresh forage, dry matter, organic matter and crude protein production and also nutrient content namely dry matter, organic matter, crude protein, extract ether, crude fiber, BETN and TDN. The result showed that the highest dry matter content was found in P3 (31.25%) and was different from P1 (26.51%) and P4 (28.12%). The highest crude protein content was found in P2 (21.10%) and was not different with P1 (21.09%) and P3 (19.20%), and the lowest crude protein was found inP4 (18.04%). The highest extract ether was at P3 (2.84%) and different from P1 (1.51%). The highest crude fiber was at P4 (22.56%) different with P1 (15.80%) and P2 (18.46%). Organic matter, BETN and TDN were not different among the different defoliation time. The highest fresh forage, dry matter, organic matter and crude protein production were at P4 and different (P<0.05) from P1, P2 and P3. The lowest dry matter was at P2. It is concluded that the best quality of grass was found in P3 group and the highest harvesting quantity was found in P4 group.