Supplementary table for paper: Enteric methane emission of dairy cows in 3 grass-based systems: Unrestricted grazing, zero-grazing, and grass silage

The supplementary table shows the Least Squares means of feed intake, feed efficiency, lactation characteristics, body weight and gaseous emissions of dairy cows by grass-based system, period and year. The grass-based systems included unrestricted grazing (UG), unrestricted zero-grazing (ZG) and unrestricted grass silage (GS). The roughage type was fresh grass outdoors (grazing sward) for UG, fresh grass indoors (zero-grazing sward) for ZG and grass silage for GS.

本补充表格展示了不同草饲系统（grass-based system）、试验周期及年份下，奶牛采食量、饲料利用率、泌乳特性、体重与气体排放的最小二乘均值（Least Squares means）。本次研究涉及的草饲系统包含三类：自由放牧（UG）、零放牧饲养（ZG）与自由牧草青贮饲喂（GS）。三类系统对应的粗饲料类型（roughage type）分别为：自由放牧组采用户外鲜草（放牧草甸，grazing sward），零放牧饲养组采用室内鲜草（零放牧草甸，zero-grazing sward），青贮饲喂组采用牧草青贮料。