Annual Net Primary Production on the Main Cropping System Experiment at the Kellogg Biological Station, Hickory Corners, MI (1990 to 2016)

Dataset Abstract Aboveground annual net primary production (ANPP) has been measured on the LTER main site since 1990 and on the successional and forested sites since 1993. ANPP is measured at peak biomass for a given treatment. In some systems with multiple harvests or complex communities that have peaks occurring at different times of the year, measurements are taken at multiple times per year. Additional ANPP measurements are made where appropriate using leaf litter traps, estimates of diameter from tree basal diameter and for the poplar treatment occasional destructive harvests. See the ANPP protocol for descriptions of the sampling and measurement methods for each of the treatments. original data source http://lter.kbs.msu.edu/datasets/22

数据集摘要：地上年净初级生产力（Aboveground Annual Net Primary Production, ANPP）的测定工作自1990年起在长期生态研究（Long-Term Ecological Research, LTER）主样地启动，自1993年起将测定范围拓展至演替样地与森林样地。ANPP的测定均在对应实验处理组的生物量峰值时段开展。针对存在多次收获需求或群落结构复杂、全年存在多个生物量峰值的生态系统，研究人员会在一年内进行多次采样测定。此外，在适宜场景下，研究人员还可通过叶面凋落物收集器、依据树木基径推算胸径的方法，以及针对杨树处理组的偶发性破坏性收获来补充ANPP测定数据。各实验处理组的采样与测定方法细节，请参阅ANPP测定规程。原始数据来源：http://lter.kbs.msu.edu/datasets/22