Live weight gain, animal behaviour and urinary nitrogen excretion of dairy heifers grazing ryegrass-white clover pasture, chicory or plantain

被引：15

作者：

Cheng, Long ^{[1
,2
]}

Al-Marashdeh, Omar ^{[1
]}

McCormick, Jeffrey ^{[1
,3
]}

Guo, Xuefeng ^{[4
]}

Chen, Ao ^{[1
]}

Logan, Chris ^{[1
]}

Tao, Jing Zhong ^{[5
]}

Carr, Hazel ^{[1
]}

Edwards, Grant ^{[1
]}

机构：

[1] Lincoln Univ, Fac Agr & Life Sci, Canterbury, New Zealand

[2] Univ Melbourne, Fac Vet & Agr Sci, Dookie, Vic, Australia

[3] Charles Sturt Univ, Sch Agr & Wine Sci, Sydney, NSW, Australia

[4] Tarim Univ, Coll Anim Sci, Xinjiang, Peoples R China

[5] Ningxia Univ, Agr Coll, Yinchuan, Peoples R China

来源：

NEW ZEALAND JOURNAL OF AGRICULTURAL RESEARCH | 2018年 / 61卷 / 04期

关键词：

Herbs; diverse pasture; nitrate leaching; sustainability; urination frequency; MILK-PRODUCTION; PERENNIAL RYEGRASS; DIVERSE PASTURES; COWS; DIGESTIBILITY; GROWTH; FERTILITY; HERB; MIX;

D O I：

10.1080/00288233.2017.1411372

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

The objective of this study was to assess live weight gain, animal behaviour and N excretion in the urine of dairy heifers fed herbs during autumn and spring. Sixty heifers were allocated into five dietary treatments: 100% ryegrass-white clove pasture (100RG/WC); 50% RG/WC+50% chicory (50CH); 75% RG/WC+25% chicory (25CH); 75% RG/WC+25% plantain (25PL); and 50% RG/WC+50% plantain (50PL). The 100RG/WC had the highest (5.0 times/6h) and lowest (2.5 times/6h) urination frequency compared with other treatments in autumn (averaged 3.5 times/6h) and spring (averaged 4.5 times/6h), respectively. The heifer LWG in spring was higher in 25CH (1.36kg/day) than other treatments (averaged 1.10kg/day). Urinary N concentration was 0.18% and 0.23% in autumn and spring, respectively, across treatments, with no difference between treatments. The study demonstrated inconsistent results of use of chicory and plantain as a mitigation tool to reduce the environmental impact of heifer rearing systems in autumn and spring.

引用

页码：454 / 467

页数：14

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