Abstract Herbage mass of rotationally grazed paddocks was measured by pasture plate meter on Massey No. 4 Dairy Farm in the Manawatu and at Limestone Downs, a sheep and beef property near Port Waikato, in the North Island, New Zealand. Data were collated and pasture accumulation rates calculated. A quadratic regression model was fitted to both farm data sets to investigate the relationship between herbage mass and pasture accumulation rate for the May to August period over two years. Although the data sets contained a large amount of unexplained variation, the effect of herbage mass on pasture accumulation rate was found to be significant (P < 0.01). The estimate for herbage mass which maximised pasture accumulation rate was 2500 kg DM ha?1 for No. 4 Dairy Farm. The optimum could not be estimated for Limestone Downs because of substantial data variability. Because the confidence interval for the dairy farm estimate of optimum is wide, it can not be concluded unequivocally that optimum herbage mass for New...
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机译:摘要在新西兰北岛怀卡托港附近的绵羊和牛肉产地,位于玛纳瓦图(Manawatu)的梅西4号奶牛场和石灰石唐斯(Limestone Downs)上,这是通过牧场放牧板式仪测量的旋转放牧牧场的牧草质量。整理数据并计算牧场积累率。对两个农场数据集均采用二次回归模型,以研究两年中五月至八月期间牧草量与牧草积累率之间的关系。尽管数据集包含大量无法解释的变化,但发现牧草量对牧场积累率的影响是显着的(P <0.01)。第四牧场的最大牧草蓄积量估计为2500 kg DM ha?1。由于大量的数据可变性,无法估算出石灰石绒毛的最佳状态。因为奶牛场最佳估计的置信区间很宽,所以不能毫无疑问地得出新牧场最佳牧草质量的结论。
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