Mixed cereal silage as a forage complement to Kikuyu grass grazing for small-scale dairy systems in the dry season.

IF 1.7 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Sirley Carrillo-Hernández, José Velarde-Guillén, Felipe López-González, Carlos Manuel Arriaga-Jordán
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Abstract

Small scale dairy systems (SSDS) require feeding alternatives that increase their productivity with low environmental impact and economically viable. The objective of this work was to compare maize silage (T1) with silages from small-grain cereal mixtures (SGCM): rye plus barley (T2) and rye plus triticale (T3) as a complement to grazing Kikuyu grass (Cenchrus clandestinus) in the dry season. Nine mid lactation Holstein cows 500 ± 54.8 kg live weight (LW), 160 ± 74.6 days in milk and daily milk yield (MY) of 13.6 ± 3.37 kg were evaluated under a repeated 3 × 3 Latin square design with 12 day periods. The agronomic variables of the pasture, the productive response of the animals, the composition of feeds and estimated methane emissions were considered. T3 presented higher crude protein (CP) and neutral detergent fibre (NDF) contents (P < 0.05) and T1 had higher in vitro dry matter digestibility (IVDMD) and estimated metabolizable energy (eME) content (P < 0.05). Gross energy lost as methane was less with maize silage (P < 0.05). There were no differences (P > 0.05) in animal variables, total matter intake and methane emissions between treatments. The inclusion of silage from SGCM can be considered a feasible alternative to supplement grazing of cows in advanced lactation for SSDS of the central Mexican highlands during the dry season.

混合谷物青贮作为一种饲料补充基库尤草放牧小规模乳品系统在旱季。
小规模乳制品系统(SSDS)需要替代饲料,以提高其生产力,对环境影响小,经济上可行。本研究的目的是比较玉米青贮(T1)与小粒谷物混合(SGCM)青贮:黑麦加大麦(T2)和黑麦加小黑麦(T3)作为旱季放牧基库尤草(Cenchrus cldestinus)的补充。采用3 × 3拉丁方设计,每隔12 d对9头活重500±54.8 kg、泌乳期160±74.6 d、日产奶量13.6±3.37 kg的泌乳中期荷斯坦奶牛进行评价。考虑了牧场的农艺变量、动物的生产响应、饲料组成和估算的甲烷排放量。处理间T3粗蛋白质(CP)和中性洗涤纤维(NDF)含量、总物质采食量和甲烷排放量均高于对照组(P 0.05)。添加SGCM青贮饲料可以被认为是墨西哥中部高原旱季SSDS在哺乳期后期补充放牧奶牛的可行替代方案。
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来源期刊
Tropical animal health and production
Tropical animal health and production 农林科学-兽医学
CiteScore
3.40
自引率
11.80%
发文量
361
审稿时长
6-12 weeks
期刊介绍: Tropical Animal Health and Production is an international journal publishing the results of original research in any field of animal health, welfare, and production with the aim of improving health and productivity of livestock, and better utilisation of animal resources, including wildlife in tropical, subtropical and similar agro-ecological environments.
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