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Articles by N. Chauynarong
Total Records ( 3 ) for N. Chauynarong
  N. Chauynarong , M.M. Bhuiyan , U. Kanto and P.A. Iji
  The objective of this study was to evaluate the variation in nutrient composition of cassava pulp from four different sources (starch manufacturers) in Thailand. Moisture content varied with drying process, being lowest in the oven-dried product and highest in the sample that was sun-dried. Gross energy content ranged between 16.2 and 16.84 MJ kg-1 while fat, crude protein starch contents were approximately 0.4-0.9, 2.0-4.0 and 37.0-75.0%, respectively. The sun-dried pulp from Chonburi contained the highest concentration of calcium, sodium, magnesium, iron and manganese. Phosphorus and potassium were 0.32-0.63 and 2.28-8.86 mg kg-1, respectively. The amino acid contents in cassava pulp were low, in line with the protein content (1.39-2.45%). Lysine, methionine and isoleucine were 0.82-1.24, 0.06-0.18 and 0.54 -1.40 mg g-1, respectively. Most of the Non-Starch Polysaccharides (NSP) were in insoluble forms (approximately 40-90 g kg-1) whereas soluble NSP was between 13.93 and 16.21 g kg-1. The main sugars in the insoluble NSP were xylose, galactose and mannose.
  N. Chauynarong , P.A. Iji , S. Isariyodom and L. Mikkelsen
  An experiment was conducted to examine the benefits of supplementing maize-soy diets with a composite microbial enzyme, Allzyme SSF, for laying hens at the pullet stage. Seven hundred and twenty 12-week old Isa Brown pullets were used in the different level of protein content diets. Feed intake from 12 to 16 weeks of age was unaffected by the enzyme supplement, except at the lowest protein content (P<0.05). Feed intake was, however, affected by the enzyme supplement between 16 and 20 weeks (P<0.001) and over the entire trial period (P<0.05). Body weight at 16 weeks of age was reduced (P<0.05) on the control low-protein diet. Feed conversion ratio was not affected by dietary protein content or through supplementation with the microbial enzyme. The relative weight of the ovary was reduced (P<0.01) on the low protein control diet, but the weight of visceral organs associated with digestion was not affected. The pullets in all groups failed to come into lay at 17 weeks of age, mainly due to very severe winter, as the experiment was conducted in a house that was not completely temperature-controlled. Onset of lay occurred from about 23 weeks of age, after the hens were already on a commercial diet but effects of previous dietary treatments on early egg production were noticeable.
  N. Chauynarong and P.A. Iji
  An experiment was conducted to examine the benefits of using cassava pulp in layer breeder diet. Six hundred and eight female and sixty four male Hisex Layer Breeders at 22 weeks of age were distributed into four different diets (a Control, Control+enzyme, Cassava pulp and Cassava pulp+enzyme). Inclusion of 10% cassava pulp and exogenous enzyme (Catazyme-P®) did not significantly affect egg production during the period of assessment (23-37 weeks of age). There were no apparent effects of treatment diet on egg quality, except yolk color score which tended to decrease when cassava pulp was added into the diet. Cassava pulp and enzyme supplementation did not significantly affect fertility and hatchability. However, enzyme supplementation marginally improved the hatchability of fertile eggs. From the results of this experiment, cassava pulp can be included at 10% in diets for breeding layer chickens.
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