Effects of dietary true digestible calcium to phosphorus ratio on growth performance and efficiency of calcium and phosphorus use in growing pigs fed corn and soybean meal-based diets1,2

2012 ◽  
Vol 90 (suppl_4) ◽  
pp. 254-256 ◽  
Author(s):  
M. Z. Fan ◽  
T. Archbold
Keyword(s):  
Growth Performance ◽  
Soybean Meal ◽  
Growing Pigs ◽  
Calcium And Phosphorus

Effect of using cassava as an amylopectin source in low protein diets on growth performance, nitrogen efficiency and postprandial changes in plasma glucose and related hormones concentrations of growing pigs

2021 ◽  
Author(s):  
Junyan Zhou ◽  
Lu Wang ◽  
Jianchuan Zhou ◽  
Xiangfang Zeng ◽  
Shiyan Qiao
Keyword(s):  
Growth Performance ◽  
Soybean Meal ◽  
Plasma Glucose ◽  
Animal Experiments ◽  
Growing Pigs ◽  
Utilization Efficiency ◽  
Nitrogen Efficiency ◽  
Low Protein ◽  
Desire To Eat

Abstract This study was aimed to explore the effect of using cassava as an amylopectin source in low protein (LP) diets on growth performance, nitrogen efficiency and postprandial changes in plasma glucose and related hormones concentrations of growing pigs. Three animal experiments were included in the present study. Treatments included corn-soybean meal LP (Corn LP), corn-cassava-soybean meal LP (Corn + Cassava LP), and cassava-soybean meal LP (Cassava LP). The in vitro digestion proved that Corn + Cassava LP and Cassava LP diets induced more rapid starch digestion and glucose release, compared with Corn LP diet. The results of animal experiments are as follows: Cassava LP diet caused the most rapid changes in plasma glucose and relevant hormones concentrations after a meal. And it decreased the concentrations of fasting plasma insulin, glucagon, and leptin concentrations compared with other treatments (P < 0.05). These modulationes above led to a strong desire to eat and increased feed intake and then weight gain in growing pigs fed Cassava LP diet. Besides, feeding Cassava LP diet caused diarrhea, increased noxious gas release from feces, and increased concentrations of fecal isobutyrate and isovalerate (P < 0.05). Compared with Corn LP group, Corn + Cassava LP group showed significantly decreased urinary nitrogen (P < 0.05) and improved post-absorptive amino acid utilization efficiency. In conclusion, the use of cassava as an amylopectin source in LP diets could modulate glucose absorption and related gut secreted hormones secretion, subsequently strengthened the desire to eat, improved growth performance, and enhanced nitrogen efficiency in growing pigs.

Mineral and vitamin supplementation of diets for growing pigs. 3. Salt, calcium and phosphorus, and trace mineral supplements in a wheat/soybean meal diet

1978 ◽  
Vol 18 (95) ◽  
pp. 781
Author(s):  
EB Greer ◽  
CE Lewis
Keyword(s):  
Soybean Meal ◽  
Research Council ◽  
Agricultural Research ◽  
Bone Development ◽  
Growing Pigs ◽  
Vitamin Supplementation ◽  
Feed Conversion ◽  
Broken Bones ◽  
Agricultural Research Council ◽  
Calcium And Phosphorus

A 2 x 2 x 3 x 3 factorial experiment with 72 growing pigs examined the effect of adding salt, calcium and phosphorus (Ca + P) and trace minerals (TM-manganese, zinc, iron and copper) to a wheat/soybean meal diet. Gilts and barrows were individually fed at restricted intakes from 20 kg liveweight. Pigs required both salt and Ca + P to reach slaughter at 73 kg. Without these minerals they stopped growing; lameness and broken bones were also common. All pigs fed salt plus the higher level of Ca + P (0.84 and 0.57 per cent, respectively) completed the experiment but only half those fed salt plus the lower level (0.42 and 0.29 per cent Ca + P, respectively) did so. There was a response to salt within three weeks. In the first four weeks, 0.125 per cent added salt improved growth by 26.5 per cent and feed conversion ratio by 21 per cent. The results indicated that growing pigs require less sodium than currently estimated (Agricultural Research Council). A response to both levels of supplementary Ca + P was seen after about seven weeks with salt and nine weeks without salt. In the first eight weeks of the experiment there were no differences in performance between the two levels of added Ca + P when salt was also used. Between 8 and 12 weeks, pigs fed the higher level grew 17 per cent faster. Although 0.84 + 0.57 per cent Ca + P increased rib Ca and P levels, foot and joint abnormalities showed that these levels were insufficient for normal bone development. This suggests that the Agricultural Research Council estimates of Ca and P requirements for restrictively fed growing pigs are low. TM supplementation did not affect performance when both salt and Ca + P were added to the diet.

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