Effect of replacing ground corn with cactus pear Nopalea cochenillifera (L.) on feed intake and digestibility, water intake, milk production and composition in Holstein × Gyr cows.

IF 1.7 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Reginaldo Muniz da Silva, Aureliano José Vieira Pires, Fabiano Ferreira da Silva, Messias de Sousa Nogueira, Hermógenes Almeida de Santana, Gabriela Dos Santos Alves
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Abstract

The objective of this study was to evaluate the intake and digestibility of nutrients, production and composition of milk, and water intake of lactating dairy cows fed standard diets in which ground corn (C) was replaced by up to 100% in the diet by cactus pear (CP). Eight Girolando cows (½ Gyr x ½ Holstein), 3rd calf multiparous, with 60 to 80 days of lactation and an average weight of 450.0 ± 30.0 kg, were randomly distributed in a double Latin square (4 × 4). Four experimental diets were evaluated: (100% C + 0% CP), (66.6% C + 33.3% CP), (33.3% C + 66.6% CP), and (0% C + 100% CP). There was a difference (P < 0.05) in the intake of CP and EE (kg.day- 1), with a quadratic effect and a linear reduction, respectively, with substitution. The maximum CP intake of 3.05 kg.day- 1 was found at 46.07% and EE intake fell by 3.81 g for each percentage unit of cactus pear added to the diet. There was a quadratic difference (P < 0.05) for DM intake in %BW and g.kg BW0,75, with maximum values of 3.97%BW and 186.8 g.kg BW0,75 with the substitution of 54.83 and 53.17%, respectively. There was a quadratic effect (P < 0.05) for the intake of NDF in %BW, with the maximum intake of 1.3% at the 74.69% substitution level. There was a linear reduction (P < 0.05) in the digestibility of DM, NDF, and TDN, and for the other nutrients there was no substitution effect (P > 0.05). There was no difference (P > 0.05) in milk production and composition. There was a linear reduction (P < 0.05) in water intake. Cactus pear can be used in a promising way to replace ground corn up to 100% in the diet of lactating dairy cows.

用仙人掌果 Nopalea cochenillifera (L.) 代替碎玉米对荷斯坦×吉尔奶牛的饲料摄入量和消化率、饮水量、产奶量和成分的影响。
本研究的目的是评估泌乳奶牛的营养摄入量和消化率、牛奶产量和成分以及饮水量,在标准日粮中,仙人掌果(CP)最高可100%取代碎玉米(C)。八头泌乳期为 60 至 80 天、平均体重为 450.0 ± 30.0 千克的第三胎多胎 Girolando 奶牛(½ Gyr x ½ Holstein)被随机分配在一个双拉丁方形(4 × 4)中。评估了四种实验日粮:(100% C + 0% CP)、(66.6% C + 33.3% CP)、(33.3% C + 66.6% CP)和(0% C + 100% CP)。随着替代品的使用,分别出现了二次效应和线性减少的差异(P - 1)。日粮中添加 46.07% 的仙人掌果时,CP 的最大摄入量为 3.05 千克/天-1,EE 的摄入量每增加一个百分点就减少 3.81 克。有一个二次方差异(P 0.75,最大值分别为 3.97%BW 和 186.8 g.kg BW0,75,替代率分别为 54.83% 和 53.17%)。存在二次效应(P 0.05)。牛奶产量和成分没有差异(P > 0.05)。牛奶产量和成分呈线性下降(P
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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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