The effect of different chemical treatments on the nutritional composition and feeding value of machine harvested corn straw
This experiment aims to investigate the effects of different chemical treatments on the nutritional composition and feeding value of machine harvested corn straw.The experiment was divided into four groups.The control group was sprayed with clean water,while the other three groups were sprayed with 5%sodium hydroxide solution(alkalization treatment group),5%urea solution(ammonification treatment group),and 5%sodium hydroxide+5%urea solution(composite chemical treatment group).After being sealed at room temperature for 7 days,5 small samples were collected from each group and dried for testing.The results showed that:1)The crude fat content of corn straw in the composite chemical treatment group was significantly higher than that in the control group(P＜0.05),and the crude protein content of corn straw in three different chemical treatment groups was significantly higher than that in the control group(P＜0.05).The neutral detergent fiber content of corn straw in the composite chemical treatment group was significantly lower than that in the control group(P＜0.05).2)The DMI and RFV of the composite chemical treatment group were significantly higher than those of the control group(P＜0.05),and the GI of the composite chemical treatment group was significantly higher than that of the alkaline treatment group and the ammonia treatment group(P＜0.05).Moreover,the GI of the alkaline treatment group and the ammonia treatment group was significantly higher than that of the control group(P＜0.05).The nutritional quality grades of the four groups of corn straw were Grade Ⅱ,Grade Ⅱ,Grade Ⅱ,and Grade Ⅰ,respectively.Conclusion:Different chemical treatments can improve the nutritional value of machine harvested corn stover.Among them,when spraying 5%sodium hydroxide+5%urea solution(composite chemical treatment),the nutritional composition and feeding value of machine harvested corn stover are better.
chemical treatmentmachine harvested corn strawnutrient compositionfeeding value
NETL
NSTL
万方数据
维普
