文献类型：期刊文献

中文题名：基于主成分分析和隶属函数分析研究刈割期和留茬高度对全株玉米青贮饲用价值的影响

英文题名：Effects of Cutting Period and Stubble Height on Feeding Quality of Whole-Plant Corn Silage Based on Principal Component Analysis and Membership Function Analysis

作者：吴鹏鑫[1];王胜男[1];王嘉麟[1];许悦雯[1];邱晓媛[1];尹福泉[1]

机构：[1]广东海洋大学滨海农业学院,湛江524088

年份：2024

卷号：36

期号：6

起止页码：4022

中文期刊名：动物营养学报

外文期刊名：CHINESE JOURNAL OF ANIMAL NUTRITION

收录：北大核心2023、CSTPCD、、CSCD2023_2024、北大核心、CSCD

基金：雷州山羊繁育体系建立及快大高繁新品系培育(2022-XDY-00-009);雷州山羊育繁推一体化关键养殖技术创新集成与示范(080503052216);遂溪县城月镇肉羊健康养殖技术示范与推广(A23086);广东省雷州山羊科技创新中心;省级现代化农业(草畜一体化)产业技术研发中心。

语种：中文

中文关键词：全株玉米青贮;饲用价值;刈割期;留茬高度;主成分分析;隶属函数分析

外文关键词：whole-plant corn silage;feeding value;cutting period;stubble height;principal component analysis;membership function analysis

中文摘要：本试验通过研究刈割期和留茬高度及其交互作用对全株玉米青贮饲用价值的影响,以确定青贮玉米适宜的刈割期和留茬高度。以“渝青玉3号”青贮玉米为试验材料,设置4个刈割期(1/4乳线期、1/2乳线期、3/4线期和蜡熟期)和5个留茬高度(20、30、40、50、60 cm),共20个处理,每个处理3个重复。对青贮玉米进行青贮后,测定全株玉米青贮的常规营养成分和霉菌毒素含量。结果显示:1)刈割期和留茬高度的交互作用对全株玉米青贮中粗蛋白质(CP)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、粗灰分(Ash)含量及总能(GE)产生了显著影响(P<0.05),其中同一刈割期时CP含量随着留茬高度的增加而增加,留茬高度相同时CP含量随着刈割期的推迟呈现下降趋势;2)刈割期和留茬高度交互作用对全株玉米青贮中玉米赤霉烯酮(ZEN)、黄曲霉毒素(AFs)产生了显著的影响(P<0.05),所有处理的霉菌毒素含量均低于饲用安全规定水平;3)综合主成分分析、隶属函数分析和相关性分析,将刈割期推迟至蜡熟期且保证留茬高度大于20 cm有利于提高全株玉米青贮的饲用价值,且在留茬高度为60 cm时表现最好。综上所述,在本试验条件下,“渝青玉3号”青贮玉米在蜡熟期刈割且留茬高度在30~60 cm时有利于提高全株玉米青贮的饲用价值,且留茬高度在60 cm时能获取最大饲用价值。

外文摘要：In order to determine the appropriate cutting period and stubble height of whole-plant corn silage(WPCS),the effects of cutting period,stubble height and their interaction on the feeding value of WPCS were studied in this experiment.“Yuqingyu No.3”silage corn as test material,4 cutting periods(1/4 milk stage,1/2 milk stage,3/4 milk stage and dough stage)and 5 stubble heights(20,30,40,50 and 60 cm)were set for 20 treatments with 3 replicates per treatment.After ensiling,the contents of conventional nutritional components and mycotoxins of WPCS were measured.The results showed as follows:1)the interaction between cutting period and stubble height had significant impacts on the contents of crude protein(CP),neutral detergent fiber(NDF),acid detergent fiber(ADF),crude ash(Ash),and gross energy(GE)in WPCS(P<0.05).When the cutting period was the same,the CP content increased with the increase of stubble height,and when the stubble height was the same,the CP content showed a decreasing trend with the delay of cutting period.2)The interaction between cutting period and stubble height had significant impacts on the contents of zearalenone(ZEN)and aflatoxins(AFs)in WPCS(P<0.05),and the mycotoxin contents of all treatments were below the level specified for safe feeding.Comprehensive principal component analysis,membership function analysis and correlation analysis showed that delaying the cutting period to the dough stage and ensuring a stubble height greater than 20 cm were beneficial for improving the feeding value of WPCS,and the best performance could be achieved when the stubble height was 60 cm.In conclusion,under the conditions of this experiment,the feeding value of WPCS can be improved by cutting“Yuqingyu No.3”silage corn at the dough stage and keeping the stubble height at 30 to 60 cm,with the maximum feeding value can be obtained when the stubble height is 60 cm.