Effect of starch-based binders on the quality of cold pelleted pellets for high-fiber feeds
High-fiber feeds pelleted under cold conditions are helpful for adult poultry and goslings to reduce feed costs and promote intestinal health.However,the pellet quality of cold-pelleted high crude fiber feeds often needs improvement.This trial was designed to evaluate the effect of different types and ratios of starch-based binders on the quality of cold-pelleted high-fiber feeds for poultry and to screen binders and levels that improve pellet quality.The experiment was divided into ten treatments;the control group was a high fiber basal diet prepared using rice husk with a crude fiber content of 8.0％.The experimental group used a 3×3 two-factors design.Factor one was binder,high gluten wheat flour,pre-dextrinized starch,and modified starch.Factor two was three binder application levels,respectively,replacing 1.5％,3％and 4.5％of the basal diet.The results showed that:(l)After 3 hours of shade drying,the stability of the pellets increased significantly(P＜0.01),and the hardness decreased significantly(P＜0.01)with the change in binder type(high gluten flour～sodium octenyl succinate).(2)After 24 hours of shade drying,the hardness of the pellets increased significantly(P＜0.01)with the type of binder(high gluten flour～sodium octenyl succinate starch).(3)After 3 hours and 24 hours of shade drying,there was no significant improvement(P＞0.05)in all indicators of pelleted feed with increasing levels of binder used(1.5％～4.5％).Therefore,using 1.5％modified starch as a binder in high fiber feeds,shade dried for 24 hours,resulted in the best cold pelleting pellet quality for high fiber feeds.
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