摘要
以10种常见园林树种为试材,采用凋落物分解网袋法,进行凋落物自然分解试验,研究了凋落物分解速率和养分释放情况,以期为城市园林树种的科学管护和城市绿地功能优化提供参考依据。结果表明:1)10种树种凋落物的分解速率大小依次是青杨>石榴>紫薇>珊瑚朴>春榆>梧桐>腊梅>皂角>泡桐>红枫;2)凋落物分解过程中有机碳释放和全氮释放较快的是青杨、石榴、紫薇,全磷释放较快的是紫薇、青杨、春榆,10种树种凋落物的纤维素分解速率没有显著差异,木质素分解均较慢,半纤维素分解较快的是春榆、青杨和石榴;3)凋落物的C/N、木质素/N以及木质素浓度与凋落物分解速率相关性不显著,凋落物的分解速率与凋落物的初始有机碳浓度、全氮浓度、N/P呈显著负相关。
Taking 10 common garden tree species as test materials, the litter natural decomposition experiment was carried out by using litter decomposition net bag method, and the litter decomposition rate and nutrient release were studied, in order to provide reference for scientific management and protection of urban garden tree species and optimization of urban green space function.The results showed that, 1) The litter decomposition rates of the 10 species were as follow, poplar>pomegranate>crape myrtle>coralpark>spring elm>sycamore>wintersweet>honey locust>paulownia>red maple.2) In the process of litter decomposition, the organic C and total N release rates were faster in poplar, pomegranate and crape myrtle, while the total P released faster in crape myrtle, poplar and spring elm.No significant differences of cellulose decomposition rate were found in the 10 tree species.Lignin decomposes slowly, while hemicellulose decomposes faster in spring elm, poplar and pomegranate.3)The litter decomposition rate significantly declined with the increase of litter initial concentration of organic C and total N,and the litter N/P ratio, while presented no significant correlations to litter C/N ratio, lignin/N ratio and lignin concentration.
作者
方玲
陈敏
林玉虎
孙旭东
陈长清
陈娟
FANG Ling;CHEN Min;LIN Yuhu;SUN Xudong;CHEN Changqing;CHEN Juan(College of Urban and Rural Construction and Planning,Mianyang Normal University,Mianyang,Sichuan 621000;Sichuan University Engineering Research Center of Rural Human Settlement Environment Construction in Northwest Sichuan,Mianyang,Sichuan 621000;Mianyang Taiyi Xianshan Botanical Garden,Mianyang,Sichuan 621000)
出处
《北方园艺》
CAS
北大核心
2022年第5期75-82,共8页
Northern Horticulture
基金
国家自然科学基金资助项目(31500505)
四川省科技厅资助项目(2021YJ0293)。
关键词
凋落物
分解速率
养分释放
分解因素
litter
decomposition rate
nutrient release
decomposition factor
