【摘要】 研究了添加不同质量分数二丙酸铵(0.3%、0.75%、1.5%)的复合防霉剂对连续2次淋雨后苜蓿Medicagosativa霉变的抑制效果。结果表明:二丙酸铵可有效抑制霉菌的生长及苜蓿中粗蛋白质、粗脂肪、可溶性糖分和氨基酸的分解。对照组和试验1组(0.3%)均检测到霉菌生长,分别在试验第6天和第8天达到最高,试验2组(0.75%)和试验3组(1.5%)未检测到霉菌;随着时间的变化,粗蛋白质含量没有显著性变化(P>0.05),粗脂肪的含量呈明显的下降趋势,添加防霉剂减少了下降的幅度,在第3天、第6天、第14天均为试验3组>试验2组>试验1组>对照组,且试验组与对照组差异显著(P<0.05);可溶性糖分含量也呈下降趋势,在前期均为试验组高于对照组,在后期则达到一致;苜蓿中总氨基酸和其中10种氨基酸含量随二丙酸铵的添量增加呈升高趋势,且与对照组差异显著(P<0.05),丝氨酸、丙氨酸、甘氨酸含量有升有降,其余4种氨基酸(谷氨酸、半胱氨酸、蛋氨酸、组氨酸)为下降趋势。更多还原

【Abstract】 The inhibition effect of different contents of 2-hydroxy propionate ammonium(0.3%,0.75% and 1.5%)to the alfalfa mildew which was rained two times continuously was studied.The results showed that 2-hydroxy propionate could effectively control the growth of mildew and the decomposability of crude protein(CP),crude fat(CF),soluble sugar(SS)and amino acid(AA)of alfalfa.The growth of mildew was found in the control group and Group 1(0.3%),besides the number of mildew reached maximum on the 6 th day and 8th day respectively and no mildew appeared in Group 2(0.75%)and Group 3(1.5%);with time prolonging,the content of CP had no significant change(P>0.05),but the content of CF presented obvious downtrend and the decreasing extent was reduced because of mildew inhibitor,in addition,the content of CF was Group 3>Group 2>Group 1>control on the 3rd day,6 th day,14 th day and the difference was significant between experiment groups and the control group(P<0.05);the content of SS was experiment groups> control group in early experiment period and it reached the same level in later period;the content of total AA as well as 10 of 17 kinds of AA were improved after adding 2-hydroxy propionate ammonium and there was remarkable difference between experiment groups and the control group(P<0.05),while the content of Ser,Ala and Gly were fluctuant and the other 4 kinds of AA(Glu,Cys,Met and His)were downtrend.更多还原