【作者】 春亮； 韩文军； 王海； 乌兰； 那日苏；

【Author】 Chunliang;HAN Wenjun;WANG Hai;Wulan;Narsu;Institute of Grassland Research,CAAS;Eurasian Temperate Steppe Research Center,CAAS;Grassland station of Sunid Baran Hoshuu;

【机构】 中国农业科学院草原研究所； 中国农业科学院欧亚温带草原研究中心； 内蒙古锡林郭勒盟苏尼特右旗草原站；

【摘要】 为了解缓释肥对荒漠草原退化草地的影响,本研究利用了释放期分别为30天（S30）和60天（S60）的包膜尿素对内蒙古苏尼特右旗荒漠草原退化草地进行了施肥试验。结果表明,两种缓释肥料对退化草地的盖度、密度的影响在不同施肥水平间均没有显著差异,对地上生物量的影响,两种肥料的效果随施肥水平的不同,变化趋势一致;S60对地上生物量的影响在施肥水平间差异显著,并以N 0.875kg 100m^-2的施肥量影响最大。t检验的结果表明,S30和S60对植被盖度的影响有显著差异,而对密度、地上生物量的影响没有显著差异。这些结果说明,缓释肥料对退化草地的植被生物量有显著的影响。更多还原

【Abstract】 To test the effect of slow-release fertilizer on the degraded desert steppe,the slow-release fertilizer with different release time of 30 days（S30） and 60 days（S60） were used on the degraded grassland in Sonid Baran Hoshuu in Inner Mongolia.The results showed,for the cover and density,no significant differences between different levels were observed in the same treat.For the aboveground biomass,the trend of influence of two fertilizers is same across different fertilizer level.S60 significantly affected the aboveground biomass,which was highest when the additional N is 0.875 kg 100m^-2.The t test showed that S30 and S60 influenced the plant cover differently,but no differences for the density and aboveground.These result suggested that the slow-release fertilizer can significantly influence the biomass of plant in degraded desert steppe.更多还原