摘要： 为了探索淋雨后苜蓿品质的变化情况,选取晾晒至半干的苜蓿,采用模拟现场淋雨的方式,研究不同淋雨模式对苜蓿霉菌的生长规律以及其品质的影响,分别设对照组、试验1组(淋雨1次)、试验2组(连续淋雨2次)、试验3组(间隔淋雨3次)、试验4组(连续淋雨4次)。结果表明:淋雨后霉菌以2次曲线形式繁殖,连续淋雨2次和间隔淋雨3次检测到了大量的霉菌繁殖,并且收割后的4～6 d是霉菌生长的高峰期,淋雨1次和连续淋雨4次霉菌数量相对较少;粗蛋白质含量没有显著变化(P>0.05),但无论淋雨次数多少,均造成苜蓿粗脂肪、可溶性糖分含量的下降,其中淋雨1次和连续淋雨2次下降缓慢,间隔淋雨3次和连续淋雨4次下降严重,且其含量均从第6天开始与对照组差异显著(P<0.05);中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)含量则呈升高趋势,并与对照组差异显著(P<0.05);淋雨后,蛋氨酸和亮氨酸有升高趋势,谷氨酸、甘氨酸变化有波动,总氨基酸和其他13种氨基酸在淋雨1次和2次时变化较小,淋雨增加至3次、4次后均呈下降趋势(P<0.05)。
关键词:
紫花苜蓿,
淋雨模式,
霉菌,
品质
Abstract: In order to explore the changes of alfalfa quality after raining,Damp-dry alfalfa and the ways of modeling scene raining were selected to study the different rainy pattern to the mildew growth laws and the quality of alfalfa,the alfalfa was respectively assigned control group,group 1(raining one time),group 2(raining two times continuously),group 3(raining one time every other day),group 4(raining four times continuously).Results showed: the mildew reproduced quickly as a conic,and plenty of mildew were found for group 2 as well as group 3,and the number of mildew reached maximum after 4～6 days of harvest,while,mildew was less relatively for the group 1 and group 4;The content of crude protein(CP) had no significant change(P 0.05),but no matter what times of raining,the content of crude fat(CF) and soluble sugar(SS) was both downtrend,which declined slowly for the group 1 as well as group 2 and rapidly for the other two groups,besides difference was marked compared with the control group from the 6th day;while(P 0.05),the content of NDF and ADF was uptrend and the difference was markedble conpared with the control group(P 0.05);after raining,Met and Leu were up-trends,and Glu along with Gly was a fluctuating change,while,the total amino acid and other 13 of 17 kinds amino acid showed a small change when raining one time and two times,but with raining times increasing to three times and four times,the content was notable dropping trends compared with the control group(P 0.05).
Key words:
Alfalfa,
Raining pattern,
Mildew,
Quality
中图分类号:
李改英, 杨艳玲, 傅彤, 廉红霞, 高腾云. 不同淋雨模式对苜蓿霉菌生长规律及其品质的影响[J]. 华北农学报, 2011, 26(4): 184-188. doi: 10.7668/hbnxb.2011.04.032.
LI Gai-ying, YANG Yan-ling, FU Tong, LIAN Hong-xia, GAO Teng-yun. Effect of Different Rainy Pattern to the Mildew Growth Laws and the Quality of Alfalfa[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(4): 184-188. doi: 10.7668/hbnxb.2011.04.032.