CAJ | 학술논문

对不同施尿素量（0，2，5，8 g／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8 g／m2处理下的草坪质量显著高于0和2 g／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18 d。但与0 g／m2相比，8 g／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5 g／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，5 g／m2处理的效果最佳。
대불동시뇨소량（0，2，5，8 g／m2）하무망은자초초평생장기내색택、주고、협관、협편상대함수량、식주전담급록색기적연구표명，시뇨소가현저제고초평식주화협편적생장속솔，제고식주전담함량，강저협편상대함수량적하강속도，개선초평색택，병차가현저연장초평적록기（P ＜0．05）。재뇨소용량상，5화8 g／m2처리하적초평질량현저고우0화2 g／m2，주요표현위초평색택생장계내도보지재6분좌우，병지소사초평록기연장18 d。단여0 g／m2상비，8 g／m2처리증가초평수전차수6차，제고초평관리성본1배이상；이5 g／m2처리지증가초평수전차수2차，가감경초평관리강도，감소관리성본。인차，5 g／m2처리적효과최가。
The effects of different urea application rates (0,2,5 and 8 g/m2 )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 con-tent,improved turf color,enhanced turf quality and prolonged the green period significantly.Turf quality un-der 5 and 8 g/m2 treatments was significantly greater than that under 0 and 2 g/m2 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 0 g/m2 treatment,the 8 g/m2 treatment increased the cut grass 6 times,which more than doubled lawn management costs while the 5 g/m2 treatment only increased the cut grass 2 times, which would reduce costs of lawn management.Hence,the optimum rate of urea fertilizer was 5 g/m2 for this turfgrass species.