火烧、刈割耙除对草地早熟禾草坪返青的影响

在沈阳浑河满融段北岸,测定了火烧、刈割耙除处理下草地早熟禾返青期的生理指标和土壤指标。结果表明:与正常生长管理的草地早熟禾草地对照相比,对草地早熟禾草地进行火烧和刈割耙除处理,均能够加快草地早熟禾返青速率,提高叶绿素含量,提高表层土壤的温度,降低表层土壤的含水量,降低表层土壤的全氮和全磷含量。与火烧处理相比,刈割耙除处理更加温和,在除去枯草层的同时,没有破坏草地原有的腐殖质层,而降低土壤含水量和氮磷含量的幅度也更低,同时也避免了火烧处理带来的环境污染和安全隐患。因此,生产中刈割耙除,可作为代替火烧的草地早熟禾草地返青期的养护管理措施。

Effects of burning,mowing and raking on green returning of Poa pratensis

This study measured the physiological and soil characteristics of the turf with Poa pratensis under the treatments with mowing,raking and burning in the northern Manrong River located in Shengyang.The re-sults showed that mowing and raking sped up the regreening rate of Poa pratensis ,increased chlorophyll con-tent,raised surface soil temperature,reduced the soil moisture,total nitrogen and total phosphorus in the surface soil compared with the control.Compared with burning,mowing and raking could reserve original humus layer, reduce loss of soil moisture,as well as nitrogen and phosphorus contents,and prevent environmental pollution and security problems.In conclusion,mowing and raking were alternative management approaches instead of burning in regreening stage of Poa pratensis .