低量施肥对高燕麦草草地植被及绵羊择食行为的影响

Effects of Small Applications of Fertiliser on Vegetation of Tall Oatgrass Dominated Pasture and Merino Sheep Grazing Behaviour

于１９９５年８～１１月在新西兰ＴａｒａＨｉｌｓ山地草地试验站进行草地施肥和放牧研究。结果表明，在所有小区的施肥区域，绵羊的分布比例都显著多于非施肥区域（Ｐ＜０．００５）。通过复相关分析，发现这种分布由于施肥量、建群植物、观测日期和观测时间的不同而略有差异，而这又与施肥促进豆科牧草的生长（主要是兔足三叶草Ｔｒｉｆｏｌｉｕｍａｒｖｅｎｓｅ）、提高高燕麦草的适口性、提高草群的含水量等有直接关系。

? A trial of fertilising and grazing was carried out at AgResearch Tara Hills High Country Research Station,New Zealand from August to November,1995.The results showed that there was a significant preference(P<0.005)by merino sheep to graze the fertilised halves of eight paddocks.It was found through multiple correlation analysis that the merino sheep distribution patterns varied with the differences of fertiliser application,dominated plants,observation dates and times,and this was directly in relation to the fertilising promoting legume growth(mainly Trifolium arvense),enhancing tall oatgrass(Arrenatherum elatius)palatability and increasing the forage moisture content.