【作者】 王莹； 陈为峰； 王海翠；

【Author】 WANG Ying;CHEN Wei-feng;WANG Hai-cui;National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources;College of Resources and Environment,Shandong Agricultural University;

【机构】 土肥资源高效利用国家工程实验室 山东农业大学资源与环境学院；

【摘要】 采用密闭通气法对控释肥不同施肥量、施肥深度以及施肥后不同养护管理措施下的草坪生态系统氨挥发损失进行了研究.结果表明:控释肥施入后,随施肥天数的增加,草坪氨挥发速率逐渐降低,不同施肥量、施肥深度以及养护措施都显著影响了草坪生态系统的氨挥发损失,影响程度:施肥量>施肥深度>灌水下限处理>修剪;草坪氨挥发速率及氨挥发积累量随施肥量的增加而增加,但氨挥发损失率下降;施肥深度≤6 cm时,草坪氨挥发量及氨挥发损失与施肥深度正相关,施肥深度>6 cm,草坪氨挥发量趋于稳定;提高草坪灌水下限和降低草坪留茬高度均显著降低了草坪的氨挥发损失.更多还原

【Abstract】 The airflow enclosure method was adopted to measure the ammonia volatilization from turf system under the different rate and ways of controlled release fertilizers application and management after fertilization on turf.The results indicated that,the rate of ammonia volatilization gradually decreased with the days after fertilization.Different fertilization and management all significantly affected the turf ammonia volatilization,according to importance of each factor,the priority order is as follows:fertilizer application rate>fertilization depth>irrigation minima>mowing.The ammonia volatilization flux had positive correlation with the fertilizer application rate,while the ammonia volatilization loss rate had negative correlation with the fertilizer application rate.When the fertilization depth is less than 6cm,the ammonia volatilization flux and loss rate were decrease with increase of fertilization depth,but the ammonia volatilization flux and loss rate seems to be stable when the fertilization deeper than 6cm.High irrigation minima and low stubble height can significantly reduce the ammonia volatilization loss rate.更多还原