Effect of supplementation of crystalline lysine on the performance of WL layers in tropics during summer

Kumari, K. Nalini; Reddy, V. R.; Preetham, V. Chinni; Kumar, D. Srinivas; Sen, Arup; Rao, S.V. Rama

doi:10.1007/s11250-016-1003-z

Cited by 10 publications

(11 citation statements)

References 13 publications

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“…The optimum requirement of Lys also depends on the protein content in the test diets as observed in our earlier studies [22]. Higher Lys (598 vs 584 mg/b/d) requirement was observed when the layers fed low protein diet (13.36% CP) compared to those fed optimum protein (15.78%).…”

Section: Discussionsupporting

confidence: 61%

Graded concentrations of digestible lysine on performance of White Leghorn laying hens fed sub-optimal levels of protein

et al. 2021

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Objective: An experiment was conducted to study the effect of graded concentration of digestible lysine (dLys) on performance of layers fed diets containing sub-optimal level of protein.Methods: Five diets were formulated to contain graded concentrations of dLys (0.700%, 0.665%, 0.630%, 0.593%, and 0.563%), but similar levels of crude protein (15% CP), energy (10.25 MJ ME/kg) and other nutrients. A total of 3,520 hens (26 wk of age) with mean body weight of 1,215+12.65 g were randomly divided into 40 replicate groups of 88 birds in each and housed in an open sided colony cage house. Each diet was offered <i>ad libitum</i> to eight replicates from 27 to 74 wk of age. The performance was compiled at every 28 d and the data for each parameter were grouped into three phases, that is early laying phase (27 to 38 wk), mid laying phase (39 to 58 wk), and late laying phase (59 to 74 wk of age) for statistical analysis.Results: Egg production, egg mass and feed efficiency (feed required to produce an egg) were significantly improved by the dLys level during the early and mid laying phases but not during the late phase. Whereas feed intake was significantly reduced by dLys concentration during mid and late laying phases but not during early laying phase. The egg weight was not affected by dLys concentration in any of the three phases.Conclusion: Based on best fitted statistical models, dietary requirements of dLys worked out to be 0.685%, 0.640%, and 0.586% during early phase, mid phase, and late egg laying phase, respectively. The calculated requirement of dLys for the respective production phases are 727 mg/b/d during the early and mid laying phases and 684 mg/b/d during the late laying phase in diets containing 15% CP.

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Section: Discussionsupporting

confidence: 61%

Graded concentrations of digestible lysine on performance of White Leghorn laying hens fed sub-optimal levels of protein

et al. 2021

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“…The overall performance of birds fed low protein diets in the present study was at par with high protein diet suggesting it as ideal CP level (13.46%) for economic production in commercial layer farming. This was in consonance with the result of Kumari et al (2016) in WL Layers from 25-36 weeks of age.…”

Section: Noticed Higher Feedsupporting

confidence: 90%

Concentration of Digestible Threonine in Diet on Production Performance and Intestinal Morphometry of WL Layers

Kumari

Kalyani

Rao

et al. 2020

IJAR

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A study was conducted to evaluate the effect of digestible threonine in graded concentrations on production performance and mucosal barrier function in layers. A total of 180 layers at 25 weeks of age were randomly distributed into six treatment groups each with five replicates of 6 birds each. The experimental diets were isocaloric with three crude protein(CP) levels i.e. low 13.46% CP(LCP), medium 15.56% CP (MCP) and high 17.05% CP(HCP) and three lysine levels (13.46/0.65%; 15.56/0.60%; 17.00/0.70%) each with 63 and 66% threonine concentrations and were offered to treatment groups for 20 weeks. Increase (p less than 0.05) in egg production was observed with an increase in protein/lysine level and threonine concentration. Mucin gene (MUC2) expression was increased (p less than 0.05) in LCP group and was evident at 66% threonine concentrations in LCP and MCP and 63% threonine concentration in HCP. The results of the study concluded that the diet with 13.46% CP and 0.65% lysine at 66% threonine were optimum for layers at 25-44 weeks of age.

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“…The shape and slope of dose-response curves have been used to assess drug doses, relative biological effectiveness, dietary nutrient requirements 67, 68, 69, 70 . In this study, we obtained a linear relationship between lysine concentrations and weight gain, food efficiency, apparent digestibility, PER, and lysine availability (Fig.…”

Section: Discussionmentioning

confidence: 99%

Improved growth performance, food efficiency, and lysine availability in growing rats fed with lysine-biofortified rice

Yang

Suen

Zhang

et al. 2017

Sci Rep

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Rice is an excellent source of protein, and has an adequate balance of amino acids with the exception of the essential amino acid lysine. By using a combined enhancement of lysine synthesis and suppression of its catabolism, we had produced two transgenic rice lines HFL1 and HFL2 (High Free Lysine) containing high concentration of free lysine. In this study, a 70-day rat feeding study was conducted to assess the nutritional value of two transgenic lines as compared with either their wild type (WT) or the WT rice supplemented with different concentrations of L-lysine. The results revealed that animal performance, including body weight, food intake, and food efficiency, was greater in the HFL groups than in the WT group. Moreover, the HFL diets had increased protein apparent digestibility, protein efficiency ratio, and lysine availability than the WT diet. Based on the linear relationship between dietary L-lysine concentrations and animal performance, it indicated that the biological indexes of the HFL groups were similar or better than that of the WT20 group, which was supplemented with L-lysine concentrations similar to those present in the HFL diets. Therefore, lysine-biofortified rice contributed to improved growth performance, food efficiency, and lysine availability in growing rats.

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Effect of supplementation of crystalline lysine on the performance of WL layers in tropics during summer

Cited by 10 publications

References 13 publications

Graded concentrations of digestible lysine on performance of White Leghorn laying hens fed sub-optimal levels of protein

Graded concentrations of digestible lysine on performance of White Leghorn laying hens fed sub-optimal levels of protein

Concentration of Digestible Threonine in Diet on Production Performance and Intestinal Morphometry of WL Layers

Improved growth performance, food efficiency, and lysine availability in growing rats fed with lysine-biofortified rice

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