施尿素对无芒隐子草草坪生长特性的影响  

Effect of urea fertilizer on growth and performance of Cleistogenes songorica turfgrass

作　　者：李欣勇 王彦荣[1] 贾存智 

机构地区：[1]草地农业生态系统国家重点实验室兰州大学草地农业科技学院,甘肃兰州730020

出　　处：《草业学报》2014年第6期136-141,共6页Acta Prataculturae Sinica

基　　金：国家重点基础研究发展计划(973计划)项目(2014CB138704,2007CB108904)资助

摘　　要：对不同施尿素量(0,2,5,8g/m2)下无芒隐子草草坪生长期内色泽、株高、叶宽、叶片相对含水量、植株全氮及绿色期的研究表明,施尿素可显著提高草坪植株和叶片的生长速率,提高植株全氮含量,降低叶片相对含水量的下降速度,改善草坪色泽,并且可显著延长草坪的绿期(P<0.05)。在尿素用量上,5和8g/m2处理下的草坪质量显著高于0和2g/m2,主要表现为草坪色泽生长季内都保持在6分左右,并至少使草坪绿期延长18d。但与0g/m2相比,8g/m2处理增加草坪修剪次数6次,提高草坪管理成本1倍以上;而5g/m2处理只增加草坪修剪次数2次,可减轻草坪管理强度,减少管理成本。因此,5g/m2处理的效果最佳。The effects of different urea application rates（0,2,5and 8g/m^2）on turf color,plant height,leaf width,relative leaf water content,nitrogen content and green period of Cleistogenes songorica turfgrass were studied.Urea fertilizer promoted the growth rate of plants and leaves,increased N and relative leaf water content,improved turf color,enhanced turf quality and prolonged the green period significantly.Turf quality under 5and 8g/m^2 treatments was significantly greater than that under 0and 2g/m^2 treatments,and the main contributing factors were improved turf color during the growth period and extension of the green period for 18 d at least.Compared with the 0g/m^2 treatment,the 8g/m^2 treatment increased the cut grass 6times,which more than doubled lawn management costs while the 5g/m^2 treatment only increased the cut grass 2times,which would reduce costs of lawn management.Hence,the optimum rate of urea fertilizer was 5g/m^2 for this turfgrass species.

关 键 词：无芒隐子草 尿素 草坪质量 绿期 

分 类 号：S688.4[农业科学—观赏园艺]