摘要
为了解具有特殊地表生境的喀斯特森林的凋落物特征和物质循环关系,为该地区森林生态系统的物质循环研究和土壤肥力、森林水文效应的评价提供科学依据和基础数据,采用收集器定位研究方法,于2006—2010年连续5年在木论保护区森林内进行凋落物采集并进行分析。结果表明:1)年凋落物量为7.85～10.49t/hm2,年平均值为8.71t/hm2;2)凋落物量的月变化为0.48～1.01t/hm2,季节分配为秋季(2.91t/hm2)>冬季(2.14t/hm2)>春季(1.93t/hm2)>夏季(1.73t/hm2);3)年凋落物组分为叶子(4.88t/hm2)>枝条(3.14t/hm2)>花果(0.40t/hm2)>其他杂物(0.30t/hm2);4)年凋落物养分归还量为Ca(16.07kg/hm2)>N(14.69kg/hm2)>K(3.30kg/hm2)>Mg(1.74kg/hm2)>Mn(0.79kg/hm2)>Fe(0.12kg/hm2),P、Zn、B分别为0.03～0.04kg/hm2;5)回归分析表明,凋落物量的月变化与月降雨量呈负相关,而与其他气象因子的关系不明显。
The litter output and nutrient return quantity in Mulun National Nature Reserve were analyzed for continuous five years from 2006 to 2010 to understand the litter characteristics and material circulation relation in karst forest with special earth’s surface habitat and to provide the scientific basis and basic data for material circulation research and elevation of soil fertility and forest hydrological effect.The results showed that ： 1） The annual litter output was 7.89~10.49 t/hm2 and the annual mean value was 8.71 t/hm2;2）The monthly variation of the litter output was 0.48~1.01 t/hm2 and the season distribution was Autumn（2.91 t/hm2）〉Winter（2.14 t/hm2）〉Spring（1.93 t/hm2）〉Summer（1.73 t/hm2）;3）The annual litter composition was leaves（4.88 t/hm2）〉branches（3.14 t/hm2）〉flowers and fruits（0.40 t/hm2）〉other debris（0.30 t/hm2）;4）The different nutrient return quantity of the annual litter was Ca（16.07 kg/hm2）〉N（14.69 kg/hm2）〉K（3.30 kg/hm2）〉Mg（1.74 kg/hm2）〉Mn（0.79kg/hm2）〉Fe（0.12 kg/hm2） and the nutrient return of P,Zn and B was 0.03~0.04 kg/hm2;5）The monthly variation of the litter was negatively related to monthly rainfall mainly and there was no obvious relation between monthly variation of the litter and other meteorological factors.
出处
《贵州农业科学》
CAS
北大核心
2012年第2期152-155,共4页
Guizhou Agricultural Sciences
基金
河池市科技局资助项目"木论自然保护区森林气象水文生态效益监测研究"(河科字2009-32)
