踩踏对亚热带沟叶结缕草草坪冬季休眠期土壤呼吸的影响  

Effects of stepping on soil respiration of Zoysia matrellalawn during the winter dormancy period

作　　者：熊莉[1] 徐振锋[1] 吴福忠[1] 杨万勤[1] 殷睿[1] 李志萍[1] 倪祥银[1] 熊海涛[2] 

机构地区：[1]四川农业大学生态林业研究所林业生态工程重点实验室,四川成都611130 [2]四川农业大学农学院,四川成都611130

出　　处：《草业学报》2014年第2期83-89,共7页Acta Prataculturae Sinica

基　　金：国家自然科学基金项目(31170423;31200474;31270498);教育部博士点(博导类)基金项目(20105103110002)资助

摘　　要：随着城市化进程加快,城市绿地也在迅速扩张,人为踩踏是城市绿地重要干扰因素,其可能对草坪土壤呼吸产生显著影响,进而影响城市草坪碳循环。因此,在典型亚热带沟叶结缕草草坪内选取人为踩踏和对照处理,采用Li-8100土壤碳通量分析仪对冬季结缕草草坪土壤呼吸速率进行动态连续测定。结果表明,亚热带沟叶结缕草草坪冬季休眠期土壤呼吸动态呈单峰曲线,先降低后升高;人为踩踏显著降低了沟叶结缕草草坪休眠期土壤呼吸速率和土壤呼吸温度敏感性(Q10);休眠期土壤呼吸速率主要受温度控制,而与土壤水分无关;试验期间,踩踏平均使土壤呼吸速率下降53.6%;踩踏引发的土壤物理特性和植物生长的变化综合作用而导致沟叶结缕草草坪土壤呼吸速率下调。With the acceleration of urbanization, urban green areas are rapidly expanding. Human stepping is one of the important disturbances impacting on urban green space and may affect the soil respiration and carbon cycle of lawns. Therefore, we choose stepping and control plots in a typical subtropical Zoysia matrella lawn. Soil respiration rates were continuously measured during the winter dormant period using a Li-8100 automatic instrument. Seasonal variations in soil respiration was characterized by a pattern of mono-peak curves, initially decreasing but then increasing. Human stepping significant reduced the soil respiration rate and temperature sensitivity of soil respiration （Q10） in the Z. rnatrella lawn during the period of dormancy. Soil respiration of Z. matrella lawn was controlled more by soil temperature than soil moisture over the dormant period. Step- ping reduced soil respiration rate of Z. matrella lawn by 53.6% on average. Stepping-induced changes in soil physical properties and growth of Z. matrella might interactively cause the decline in soil respiration.

关 键 词：草坪 踩踏 沟叶结缕草 生物量 土壤温度敏感性 

分 类 号：S688.4[农业科学—观赏园艺] S154[农业科学—园艺学]