Nutritional value of 4 economic crop byproducts and 3 warm-season forage in the southern region of China using in vitro gas production method
This paper aimed to evaluate the nutritional value of 4 kinds of economic crop byproducts and 3 kinds of warm-season forage grown in southern China to provide basis to develop new feed resources.In vitro gas production was used according to a single factor design and 14 kinds of samples for evaluation.The gas production during 0-96 h,and volatile fatty acid,ammonia nitrogen,microbial protein concentration,pH and the in vitro dry matter digestibility at 24 h was evaluated.The results showed that the crude protein and crude fat content of cassava leaf was significantly higher than that in other economic crop byproducts and forage (P＜0.05).For gas production of economic crop byproducts,the orders from big to small were pomelo peel ＞ cassava starch residue ＞ cassava leaves ＞ semen coicis straw,and for the grass,elephant grass (Indonesia introduction) ＞ emperor bamboo grass＞ jean grass.Pomelo peel and cassava starch residue theory of gas production rate was significantly higher than that of other economic crop byproducts and pasture (P＜0.05).Pomelo peel of acetic acid,propionic acid,isovaleric acid,valeric acid and total volatile acid was significantly greater than that of other economic crop byproducts and herbage (P＜0.05).Ammonia nitrogen content of elephant grass (Indonesia introduced) was significantly higher compared with other economic crop byproducts and forage (P＜0.05).While,there were no significant differences in pH values and microbial protein levels among treatments (P ＞ 0.05).Together,Southern economic crop byproducts and forage used in this study were relatively high in the crude protein and crude fat contents,good activity in microbial activity,easy to digest and proper energy needed for the ruminants.In addition,pomelo peel has the highest nutritional value,followed by cassava starch residue,cassava leaves and semen coicis straw.The elephant grass forage (Indonesia introduction) was superior to the emperor bamboo grass and jean.
economic crop byproductswarm-season foragein vitro gas productionrumen fermentationdigestibility of dry matter
国家科技期刊平台
NSTL
万方数据
维普
