NUTRIENT BALANCE IN THE DIET OF GRAZING DAIRY-COWS

被引：14
|
作者：
KELLAWAY, RC
TASSELL, RJ
HAVILAH, E
SRISKANDARAJAH, N
ANDREWS, A
机构：
[1] UNIV WESTERN SYDNEY, RICHMOND, NSW 2753, AUSTRALIA
[2] NEW S WALES DEPT AGR, BERRY, NSW 2535, AUSTRALIA
来源：
AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH | 1993年 / 44卷 / 03期
关键词：
GRAZING SELECTION; NUTRIENT INTAKE; DAIRY COWS;
D O I：
10.1071/AR9930423
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
A method is described for estimating the nutrient content of pasture selected by grazing cows. The method is non-invasive and suitable for use on commercial farms. Results from use of the method are reported for studies on a commercial farm over a period of 29 months. Confidence limits were calculated for estimated nutrient contents of pasture eaten. Estimated nutrient contents then were compared with recommended nutrient contents for high-yielding cows. Significant deficiencies of energy, protein, Ca, P and Na were common. Seasonal trends in nutrient content of pasture eaten are reported, together with selection differentials between pasture eaten and pasture available.
引用
收藏
页码：423 / 430
页数：8
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