TY  - JOUR
T1  - Effects of Location, Genotype and Ratooning on Chemical Composition of Sweetpotato [<I>Ipomea batatas</I> (L.) Lam] Vines and Quality Attributes of the Roots
AU - Niyireeba, Remy Titien AU - Ebong, Cyprian AU - Lukuyu, Ben AU - Agili, Sammy AU - Low, Jan AU - Gachuiri, Charles 
JO  - Agricultural Journal
VL  - 8
IS  - 6
SP  - 315
EP  - 321
PY  - 2013
DA  - 2001/08/19
SN  - 1816-9155
DO  - aj.2013.315.321
UR  - https://makhillpublications.co/view-article.php?doi=aj.2013.315.321
KW  - Sweetpotato
KW  -ecozones
KW  -ratooning
KW  -vines
KW  -quality
AB  - Dual-purpose sweetpotato is gaining recognition as a food 
  and fodder crop. The quality of the vines depends on several factors including 
  genotype and environment. Cutting vines before root harvest can increase yields 
  and fodder quality of vines. But, the effect on root quality has not been sufficiently 
  investigated. This study was conducted to determine the effects of agro-ecology 
  (n = 3), genotype (n = 7) and vines cuts (n = 3) on chemical composition and 
  Metabolizable (ME) energy concentrations in vines and on farmers&#146; 
  preference of the roots. Dry Matter (DM) concentrations were lower in vines 
  than in roots. It tended to be higher in ratoons than in vines cut only once 
  at 160 DAP. Varieties differed significantly in the concentrations NDF (p = 
  0.0315), ADF (p = 0.026) and ADL (p = 0.0032) but not in CP and ME (p&gt;0.05). 
  Vine that were cut at 80 DAP had significantly lower concentrations of the fiber 
  components (p&lt;0.0001) and significantly higher concentrations of CP and ME 
  than regrowth and intact vines cut at 160 DAP (p&lt;0.0001). Ecozones differed 
  significantly in contents of ADF (p = 0.026), ADL (0.0032) and ME (p = 0.0056). 
  Cojoint analysis of preference scores revealed that variety accounted for 74.0,67.1 
  and 36.1% of the scores for texture, sweetness and color respective. Ratooning 
  accounted for 5.2, 2.6 and 4.6% of the scores for texture, sweetness and color, 
  respectively. Gender accounted for 20.8, 30.3 and 37.9% of the preference scores 
  for texture, sweetness and color, respectively. The results proved that cutting 
  vines twice at 80 days before and again at root harvest (160 DAP) improved vine 
  quality without affecting root quality.
ER  -