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≤6cm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>6cm时,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。
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 fertiliza- tion on turf. The results indicated that, the rate of ammonia volatilization gradually decreased with increas- ing days after fertilization. Different fertilization and management all significantly affected the turf ammonia volatilization, according to importance of each factor, the priority order was as follows： Fertilizer application rate 〉fertilization depth 〉irrigation minima 〉pruning. The ammonia volatilization flux had positive corre- lation with the fertilizer application rate, while the ammonia volatilization loss rate had negative correlation with the fertilizer application rate. When the fertilization depth was less than 6 cm, the ammonia volatiliza- tion flux and loss rate decreased with increase of fertilization depth, but the ammonia volatilization flux and loss rate seemed to be stable when the fertilization depth deeper than 6 cm. High irrigation minima and low stubble height could significantly reduce the ammonia volatilization loss rate.
出处
《水土保持学报》
CSCD
北大核心
2013年第6期280-284,共5页
Journal of Soil and Water Conservation
基金
国家"十二五"科技支撑计划课题(2011BAD11B01)
关键词
草坪
控释氮肥
施肥
灌水下限
氨挥发
turf
controlled release fertilizer
fertilization
irrigation minima
ammonia volatilization.
