Effect of dietary protein content on ileal amino acid digestibility, growth performance, and formation of microbial metabolites in ileal and cecal digesta of early-weaned pigs1,2

2007 ◽  
Vol 85 (12) ◽  
pp. 3303-3312 ◽  
Author(s):  
J. K. Htoo ◽  
B. A. Araiza ◽  
W. C. Sauer ◽  
M. Rademacher ◽  
Y. Zhang ◽  
...  
Keyword(s):  
Amino Acid ◽  
Growth Performance ◽  
Protein Content ◽  
Dietary Protein ◽  
Microbial Metabolites

scholarly journals The effect of dietary crude protein content on apparent and true ileal nitrogen and amino acid digestibilities

1994 ◽  
Vol 72 (1) ◽  
pp. 59-68 ◽  
Author(s):  
A. Donkoh ◽  
P. J. Moughan
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Protein Content ◽  
Dietary Protein ◽  
Crude Protein ◽  
Apparent Digestibility ◽  
Meat And Bone Meal ◽  
Bone Meal ◽  
Ileal Digestibility ◽  
Dietary Protein Level

The effect of dietary protein content (25, 60, 95, 130, 165 and 200 g crude protein (N × 6.25)/kg diet) on the apparent and true ileal digestibilities of N and amino acids in meat-and-bone meal given to the growing rat was investigated. Semi-synthetic diets in which meat-and-bone meal was the sole protein source were given to 180 g body-weight rats for 14 d. On the fourteenth day the rats were fed and then killed 4 h after the start of feeding and digesta were sampled from the terminal 200 mm ileum. Endogenous amino acid excretion was determined for eighteen rats given an enzymically hydrolysed casein (EHC)-based diet and with subsequent treatment of the digesta using ultrafiltration. The EHC-fed rats were killed 3 h after the start of feeding and digesta were collected from the terminal 200 mm ileum. True ileal digestibility values determined with reference to Cr as a marker were higher than the corresponding apparent estimates. Apparent digestibility values of N and amino acids increased significantly (P < 0.001) with increasing dietary protein level; however, dietary protein content had no significant (P > 0.05) effect on the true ileal digestibilities of N and amino acids. The mean apparent ileal digestibility of N in meat-and-bone meal ranged from 65.6 to 75.3%. The corresponding range for the true ileal digestibility of N was 76.9 to 78.2%. True ileal digestibility, unlike apparent digestibility, appears to be independent of dietary protein level and may allow feed ingredients to be compared accurately even if they are ingested in different quantities.

scholarly journals Interaction of dietary protein and energy-protein ratio on growth performance of snakehead Channa striata

2018 ◽  
Vol 18 (1) ◽  
pp. 70-79
Author(s):  
Hani Wijianti ◽  
Muhammad Agus Suprayudi ◽  
Nur Bambang Priyo Utomo ◽  
Dedi Jusadi
Keyword(s):  
Growth Performance ◽  
Protein Content ◽  
Dietary Protein ◽  
High Energy ◽  
Average Weight ◽  
Protein Ratio ◽  
Dietary Level ◽  
Randomized Design ◽  
Excellent Growth ◽  
Channa Striata

ABSTRACTThe study proposed to discover the optimum protein content and energy-protein ratio in practical diet for snakehead, Channa striata. The experiment applied complete randomized design, consisted of six treatments with four replications on each treatment. The treatments were: A (32.5%; 11.82 kcal GE/g), B (32.5%; 13.32 kcal GE/g), C (37.17%; 10.64 kcal GE/g), D (37.33%; 12.07 kcal GE/g), E (43.08%; 10.02 kcal GE/g), and F (42.88%; 10.66 kcal GE/g). Snakehead with average weight of 6.21 ± 0.03 g were reared for 8 weeks. The treatments showed significant results. Increased protein dietary level had increased the growth rate and treatment with high energy-protein ratio at the same protein dietary level provided better growth performance. However, increased energy-protein ratio at E and F treatments caused a decline in growth performance. The improvement of energy-protein dietary ratio had positive correlation with the level of lipid and protein content in fish body. Similar finding was found in liver and muscle glycogen. The results also showed that the increament of energy-protein dietary ratio was significantly and positively correlated with cholesterol, triglyceride, HDL, glucose, and albumin, yet it had no significant effect on LDL. It can be concluded that excellent growth performance was achieved by protein dietary level of 37.33% and energy-protein ratio of 12.07 kcal GE/g.Keywords: energy-protein ratio, growth, snakehead ABSTRAKPenelitian ini bertujuan untuk memperoleh kadar protein dan rasio energi-protein pakan buatan yang optimum bagi performa pertumbuhan ikan gabus. Penelitian ini mengaplikasikan rancangan acak lengkap dengan 6 perlakuan, yaitu: A (32,78%;11,82  kkal GE/g), B (32,56%;13,32 kkal GE/g), C (37,17%:10,64 kkal GE/g), D (37,33%:12,07 kkal GE/g), E (43,08%:10,02 kkal GE/g), dan F (42,88%:10,66 kkal GE/g) dan masing-masing terdiri 4 ulangan. Bobot rata-rata ikan gabus yang digunakan dalam penelitian ini yaitu 6,21 ± 0,03 g dan dipelihara selama 8 minggu. Hasil penelitian menunjukkan bahwa peningkatan kadar protein pakan meningkatkan laju pertumbuhan, dan perlakuan dengan rasio energi-protein tinggi pada level protein pakan yang sama memberikan kinerja pertumbuhan yang lebih baik. Namun demikian, pada perlakuan E dan F, peningkatan rasio energi-protein menyebabkan penurunan kinerja pertumbuhan. Peningkatan rasio energi-protein pakan berkorelasi positif terhadap kadar lemak dan protein tubuh ikan. Hal yang sama juga terjadi pada glikogen hati dan otot. Hasil penelitian juga menunjukkan bahwa peningkatan rasio energi-protein pakan berpengaruh nyata (P<0,05) dan  berkorelasi positif terhadap kolesterol, trigliserida, HDL, dan albumin, tetapi tidak berpengaruh nyata terhadap LDL  (P>0.05). Kesimpulan yang didapat adalah kinerja pertumbuhan optimal dihasilkan oleh kadar protein pakan 37,33% dan rasio energi protein pakan 12,07 kkal GE/g.Kata kunci: albumin, energi, ikan gabus, pertumbuhan, protein 

The influence of nutrition in early life on growth and development of the pig 1. Effects of protein nutrition prior and subsequent to 6·5 kg on growth and development to 45 kg

1983 ◽  
Vol 36 (3) ◽  
pp. 415-423 ◽  
Author(s):  
R. G. Campbell ◽  
A. C. Dunkin
Keyword(s):  
Body Composition ◽  
Growth Performance ◽  
Protein Content ◽  
Dietary Protein ◽  
Growth And Development ◽  
Crude Protein ◽  
Live Weight ◽  
Body Protein ◽  
Protein Diets ◽  
Protein Treatment

ABSTRACTForty-five piglets were used to study the effects of feeding diets containing 153, 239 or 321 g crude protein per kg dry matter between 1·8 and 6·5 kg live weight, and low and high protein diets subsequent to 6·5 kg live weight on growth performance, body composition and the cellularity of skeletal muscle to 45 kg live weight.Reducing dietary crude protein between 1·8 and 6·5 kg live weight depressed growth performance and at 6·5 kg live weight increased body fat content but reduced body protein, body water and the weight and DNA content of the adductor muscle. The effects of dietary protein content before 6·5 kg live weight on body composition at the latter weight were still evident in pigs killed at 11·5 kg live weight whilst the differences in muscle DNA persisted to 45 kg live weight.On the lower protein treatment subsequent to 6·5 kg live weight there was a tendency for pigs given the lowest protein diet before 6-5 kg live weight to exhibit better growth performance and deposit protein at a faster rate than those given the higher protein diets. However, these responses were reversed on the higher protein treatment subsequent to 6·5 kg live weight.The effects of dietary protein content subsequent to 6·5 kg live weight on growth performance, body composition and the cellularity of muscle tissue were qualitatively the same as those for the live-weight phase 1·8 to 6·5 kg.

Effect of dietary protein level and salinity on growth, survival, enzymatic activities and amino-acid composition of the white shrimp Litopenaeus vannamei (Boone, 1931) juveniles

Crustaceana ◽  
2015 ◽  
Vol 88 (1) ◽  
pp. 82-95 ◽  
Author(s):  
Liying Sui ◽  
Guannan Ma ◽  
Yuangao Deng
Keyword(s):  
Amino Acid ◽  
Protein Content ◽  
Muscle Tissue ◽  
Litopenaeus Vannamei ◽  
Dietary Protein ◽  
Protein Level ◽  
White Shrimp ◽  
Lower Growth ◽  
Protein Levels ◽  
Dietary Protein Level

Litopenaeus vannamei (Boone, 1931) postlarvae with average initial body weight of 0.089 g were reared in 75-litre PVC tanks for 40 days at salinities of 30 and 60 g l−1. The shrimps were fed compound feed containing protein levels of 35, 40, 45 and 50%, respectively. Salinity had a remarkable effect on growth and survival of L. vannamei juveniles. Higher survival rate and lower growth were observed at 60 g l−1 salinity. Dietary protein level affected the survival and growth of juveniles at both salinities, increased with dietary protein levels in the range of 35 to 45%, but decreased slightly with 50% dietary protein. Broken line analysis showed that the estimated optimal dietary protein levels at salinities of 30 and 60 g l−1 were 45.93 and 46.74%, respectively. Higher salinity resulted in an increased moisture content, ash and crude protein content in the shrimp muscle tissue. The amino acid contents in the shrimp muscle tissue were generally higher at 60 g l−1 salinity and increased dietary protein level led to higher protein content, except with 50% dietary protein. At salinity 60 g l−1, the soluble protein content and activities of glutamic oxalacetic transferase (GOT) and glutamic pyruvic transaminase (GPT) in shrimp muscle tissue were higher, while catalase (CAT) activities were lower. Farming of L. vannamei at a marginal culture salinity (60 g l−1) is feasible though the shrimps were likely exposed to stressful conditions. Reduced growth rate at higher salinity may be attributed to the higher total ammonium (TAN) concentration in the culture medium and extra energy consumption for osmoregulation at hypersaline conditions.

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