氮肥对冷季型混播草坪返青期生长特性的影响

对不同施氮量和施氮频率下冷季型混播草坪返青期生长特性的研究表明:施氮对草坪质地无显著影响,在施氮20 g/m2.a、施氮频率为2次的处理下,草坪的高度和密度最大;单位面积草坪地上植物积累量以施氮肥25 g/m2.a的处理最高,而施氮频率对其无显著影响;施氮量在0~25 g/m2.a时,草坪草地上植物积累量与施氮量呈显著正相关;高施氮量有利于草坪草春季的返青,返青最早的施氮处理为25 g/m2.a。

Effect of nitrogen application quantity and frequency on the growth performance of cold-season turfgrass in regreening period

The effects of different nitrogen application quantity and frequency on the growth performance of cold-season turfgrass in regreening stage were studied.The results showed that the effect of nitrogen on turfgrass texture was not significant.The growth speed and height of turfgrass were highest under the treatment of 25 g N and two times in one year,and the density of turf was highest as well.When applied nitrogen changed between 0 and 25 g/m~(2)a the aboveground phytomass of turfgrass increased along with the rise of nitrogen application quantity,but it was not influenced by fertilizing frequency.The regreening date was significantly brought forward under the treatment of 25 g N in a year compared with other treatments.