[Comparison of forage production and nitrogen content of three grass genotypes on different harvesting time]
2004
Tanjegau, N.B.((Universitas Tadulako, Palu (Indonesia). Fakultas Pertanian)) | Amar, A.L.
An experiment has been conducted in order to compare forage production of 3 grass genotypes on 4 stages of growth. This four months study was undertaken in the field of Taman Ternak-Sidera. Forage production of the grasses was compared base on dry-matter yield, nitrogen concentration, and crude-fiber content. This two-factors plot trial involved; i) grass genotypes which consisted of guinea grass (Panicum maximum), elephant grass (Pennisetum purpureum), and setaria (Setaria sphacelata), and (ii) stages of growth (days of regrowth) consisted of vegetative stage (40 days), late-vegetative (48 days), generative (63 days), and late-generative (79 days). Two replications were applied for 12 combination factors, hence, gained 24 experimental units where arranged in a randomized block design. Obtained data were tested by Analysis of Variance, followed by the Least Significant Differences test. The results showed that dry-matter yield, nitrogen and crude-fiber contents of the forage were very significantly affected by both grass genotype, and stage of growth (age of harvesting, dry-matter yield and crude-fiber content) increased by the age of the plants, while nitrogen concentration became lower on the older plants. In general, the highest forage production gained from elephant grass, followed by guinea grass. The highest nitrogen concentration was indicated by setaria grass on 40 days regrowth harvesting, but differences among the grasses decreased when plants got older and cheashed-out on the age of 79 days and the lowest crude-fiber content was resulted from setaria on each of the harvesting treatment.
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