ABSTRACT This experiment was conducted to study the effects of cutting height and interval on the biomass yield and nutritive quality of Andropogon tectorum Schumach and Panicum maximum Jacq. in the natural pasture at the Federal University of Agriculture, Abeokuta from October 2010 to March 2011. Two cutting heights: 20 and 30 cm above ground level and three cutting intervals: four, six and eight weeks were combined in a factorial arrangement and randomized complete block design with three replicates. Harvesting started four weeks after the cut back of the initial growth in October 2010. At each harvest, forage samples were randomly taken, weighed, separated into different species components and oven-dried to determine the dry matter yields (DMY). The leaf and stem components of the forages were milled and subjected to chemical analysis. Data obtained were analyzed using two-way analysis of variance while significant means were separated using Duncan‟s Multiple Range Test. The results showed that the DMY for P. maximum significantly (P<0.05) increased with increase in cutting height (13,3
88.72 – 15,462.21 kg/ha), while there was no effect (P>0.05) of cutting interval on DMY of both grasses. The leaf proportion of both grasses (P. maximum: 95.20 – 83.88 %; A. tectorum: 70.49 – 44.56 %) decreased (P<0.05) with increase in cutting interval. Both the tiller and plant densities increased with increase in cutting interval of the grasses. The values for dead/senescent materials for A. tectorum increased significantly (P<0.05) with increase in cutting height and interval while the proportion of weed increased with extended cutting intervals. The ether extract values in A. tectorum increased as the cutting interval increased. The crude protein content of the two grasses declined significantly (P<0.05) with increase in interval of cutting, but the values (11.10 – 8.35 % and 9.71 – 5.24 % for maximum and A. tectorum respectively) were within the level recommended for optimum ruminant performance in the tropics. On the other hand, neutral detergent fibre, acid detergent fibre, acid detergent lignin, cellulose and hemicelluloses significantly (P<0.05) increased with increase in cutting interval for the two grasses. In vitro dry matter digestibility, short-chain fatty acids, organic matter digestibility and metabolizable energy for the two grasses also declined (P<0.05) as cutting interval increased, while there was no effect (P>0.05) of cutting height on the nutritive quality parameters of both grasses. The in vitro gas production for the two grasses increased as incubation period extended from 0 – 72 hrs. The phosphorus, calcium, sodium and magnesium contents for A. tectorum were lower for the eight weeks interval while there was no definite pattern observed for P. maximum. To strike a balance between dry matter yields and nutritive quality of P. maximum and A. tectorum, cutting interval of six weeks and height of 30 cm above ground level at the time of cutting is appropriate.
ADETAYO BAMIKOLE, A (2018). BIOMASS YIELD AND NUTRITIVE QUALITY OF TWO GRASSES IN THE NATURAL PASTURES AS AFFECTED BY CUTTING HEIGHT AND INTERVAL IN ABEOKUTA. Afribary.com: Retrieved May 08, 2021, from https://afribary.com/works/biomass-yield-and-nutritive-quality-of-two-grasses-in-the-natural-pastures-as-affected-by-cutting-height-and-interval-in-abeokuta
ADEKEYE, ADETAYO BAMIKOLE. "BIOMASS YIELD AND NUTRITIVE QUALITY OF TWO GRASSES IN THE NATURAL PASTURES AS AFFECTED BY CUTTING HEIGHT AND INTERVAL IN ABEOKUTA" Afribary.com. Afribary.com, 23 Mar. 2018, https://afribary.com/works/biomass-yield-and-nutritive-quality-of-two-grasses-in-the-natural-pastures-as-affected-by-cutting-height-and-interval-in-abeokuta . Accessed 08 May. 2021.
ADEKEYE, ADETAYO BAMIKOLE. "BIOMASS YIELD AND NUTRITIVE QUALITY OF TWO GRASSES IN THE NATURAL PASTURES AS AFFECTED BY CUTTING HEIGHT AND INTERVAL IN ABEOKUTA". Afribary.com, Afribary.com, 23 Mar. 2018. Web. 08 May. 2021. < https://afribary.com/works/biomass-yield-and-nutritive-quality-of-two-grasses-in-the-natural-pastures-as-affected-by-cutting-height-and-interval-in-abeokuta >.
ADEKEYE, ADETAYO BAMIKOLE. "BIOMASS YIELD AND NUTRITIVE QUALITY OF TWO GRASSES IN THE NATURAL PASTURES AS AFFECTED BY CUTTING HEIGHT AND INTERVAL IN ABEOKUTA" Afribary.com (2018). Accessed May 08, 2021. https://afribary.com/works/biomass-yield-and-nutritive-quality-of-two-grasses-in-the-natural-pastures-as-affected-by-cutting-height-and-interval-in-abeokuta