Nutritional Quality of Corn Silage on Dairy Farms in the Republic of Croatia

IF 0.5 Q4 AGRICULTURAL ECONOMICS & POLICY

Poljoprivreda Pub Date : 2022-06-30 DOI:10.18047/poljo.28.1.9

M. Domaćinović, Ivica Vranić, Ivana Prakatur, M. Špehar, Z. Ivkić, Dragan Solić

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Abstract

For the purpose of corn silage quality evaluation, 270 samples on dairy farms in twelve (12) counties were analyzed in this study. The prepared samples were subjected to the FT-NIR device using the AgriQuant-B1 spectrometer (Model: QIA 1020), which analyzed the values of nine (9) nutritional, two (2) indicators of rumen fermentation, and three (3) indicators of corn silage fermentation. One physical indicator, the silage particle size distribution, was determined by sieving through a three-sieve system (Penn State Separator). The average values of most of the monitored nutritional indicators were satisfactory: DM = 349 g kg-1, crude protein = 65 g kg-1 DM, crude ash = 38 g kg-1 DM, crude fiber = 180 g kg-1 DM, acid detergent fiber = 210 g kg-1 DM, neutral detergent fiber = 387 g kg-1 DM, acid detergent lignin = 17 g kg-1 DM, starch = 336.59 g kg-1 DM, net energy of milk = 6.76 MJ g kg-1 DM. Significant deviations in Max. and Min. were found for the DM values (156 non-compliant samples), as many as 231 non-compliant samples were found for crude protein, 90 noncompliant samples were detected for the acidic detergent fibers, and 233 for starch. The rumen fermentation indicators, expressed as average digestible organic matter (dOM), amounted to 75.6%, and those of digestible neutral detergent fiber (dNDF) amounted to 52.8%. The average pH value reached a desirable value of 3.85, with an average concentration of lactic acid (54.9 g kg-1 DM) and acetic acid (21.1 g kg-1 DM). The average values of silage particle size distribution, measured through four fractions, resulted in the following values: sieve 1 – 5.7%; sieve 2 – 55.7%; sieve 3 – 26.1% and bottom vessel – 12.6%. The strongest positive correlation was found between the crude fiber in relation to the ADF (r = 0.870), NDF (r = 0.959), and ADL (r = 0.790) and between the NDF and ADF (r = 0.845). Negative correlation was strongest between the ADL and dOM (r = -0.844), between the starch compared to the CF (r = -0.835) and NDF (r = -0.809), and between thepH and lactic acid (r = -0.804). These correlations between the indicators were also statistically highly significant (p<0.001).

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克罗地亚共和国奶牛场玉米青贮饲料的营养品质

为了评价玉米青贮饲料的质量，本研究对12个县270个奶牛场的样品进行了分析。使用AgriQuant-B1光谱仪（型号：QIA 1020）对制备的样品进行FT-NIR装置，该装置分析了九（9）个营养指标、两（2）个瘤胃发酵指标和三（3）个玉米青贮发酵指标的值。一个物理指标，青贮饲料粒度分布，通过三筛系统（宾夕法尼亚州立分离器）进行筛分来确定。大多数监测营养指标的平均值均令人满意：DM=349 g kg-1，粗蛋白=65 g kg-1 DM，粗灰分=38 g kg-1 DM，粗纤维=180 g kg-1糖尿病，酸性洗涤剂纤维=210 g kg-1 DM.中性洗涤剂纤维=387 g kg-1DM，酸性洗涤剂木质素=17 g kg-1德姆，淀粉=336.59 g kg-1达姆，牛奶净能量=6.76 MJ g kg-1。DM值的最大值和最小值存在显著偏差（156个不合规样品），粗蛋白的不合规样品多达231个，酸性洗涤剂纤维的不合规样本多达90个，淀粉的不合规试样多达233个。瘤胃发酵指标以平均可消化有机物（dOM）表示，达75.6%，可消化中性洗涤纤维（dNDF）达52.8%。平均pH值达到3.85，乳酸（54.9 g kg-1 DM）和乙酸（21.1 g kg-1 DM）的平均浓度。通过四个部分测量的青贮饲料粒度分布的平均值得出以下值：1号筛–5.7%；筛2–55.7%；筛3–26.1%，底部容器–12.6%。粗纤维与ADF（r=0.870）、NDF（r=0.959）和ADL（r=0.790）之间以及NDF与ADF之间（r=0.845）之间的正相关最强。ADL与dOM之间的负相关最强（r=-0.844），淀粉与CF（r=-0.835）和NDF之间的负相关性最强（r=0.809），和乳酸之间的相关性（r=-0.804）。这些指标之间的相关性也具有统计学意义（p<0.001）。

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来源期刊

Poljoprivreda AGRICULTURAL ECONOMICS & POLICY-

CiteScore

1.00

自引率

14.30%

发文量

审稿时长

15 weeks

期刊介绍： POLJOPRIVREDA“ (AGRICULTURE), a scientific-professional journal has been issued since 1995 by the Faculty of Agriculture in Osijek and Agricultural Institute Osijek . The journal is a successor of the former one „Science and practice in agriculture and food technology“ printed from 1982 to 1994. The journal „Poljoprivreda“ is known for publishing scientific and professional articles from all fields of agricultural science and profession. The papers are reviewed. Articles are categorized by two independent referees and approved by Editorial board and Editor – in – chief. Summaries of master"s and doctor"s theses are also published as well as other contributions by the special decisions of the Editorial board.