BIOMASS YIELD AND NUTRITIVE QUALITY OF TWO GRASSES IN THE NATURAL PASTURES AS AFFECTED BY CUTTING HEIGHT AND INTERVAL IN ABEOKUTA

ADETAYO BAMIKOLE ADEKEYE 140 PAGES (28937 WORDS) Thesis
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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. 

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APA

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

MLA 8th

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.

MLA7

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 >.

Chicago

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