摘要
对北京密云水库库西试验区12年生的麻栎人工混交林凋落物养分归还特征进行了观测和研究。结果表明:12年生麻栎人工混交林的年凋落物量为1455.71kg.hm-2;凋落物N、P、K的年归还总量为14.06kg.hm-2,其中N在凋落物归还总量中占的比例最大,为9.06kg.hm-2,占元素总归还量的64.46%;其次是K,为4.33kg.hm-2,占30.76%;P所占的比例最低,为0.67kg.hm-2,占4.78%。凋落物现存量约为5.66t.hm-2,凋落物层的平均分解率为0.26t.hm-2;凋落物层N、P、K总贮量为50.72kg.hm-2。
An experiment was conducted to study the characteristics of nutrient return of litterfall in a 12-year-old Quercus acutissima and Platycladus orientalis mixed plantation in the western reservoir of Miyun in Beijing. Results show that the average annual litterfall production in the mixed plantation was 1 455.71 kg·hm-2,and the annual total return of N,P and K in litterfall was 14.06 kg·hm-2. The annual return of N (9.06 kg·hm-2) contributed 64.46 percent to the total return,followed by K (4.33 kg·hm-2,30.76 percent) and P (0.67 kg·hm-2,4.78 percent). The total current biomass of the litter on the ground surface was 5.66 t·hm-2,and annual decomposition rate was 0.26 t·hm-2. The total amount of N,P,and K in the litter layer was 50.72 kg·hm-2.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2010年第7期13-15,共3页
Journal of Northeast Forestry University
基金
国家"十一五"科技支撑计划课题(2006BAD03A02)
北京市科委2006年度科技计划重大项目(D0706007040191-07)资助
关键词
麻栎
侧柏
人工林
凋落物
养分
Quercus acutissima
Platycladus orientalis
Plantations
Litterfall
Nutrients
作者简介
肖洋,男,1978年12月,教育部水土保持重点实验室(北京林业大学),讲师。
通信作者:陈丽华,教育部水土保持重点实验室(北京林业大学),北京林业大学水土保持学院,教授。