Nitrogen fixation and net primary production in a young Sitka alder stand

摘要

Biomass, net primary production and nitrogen fixation rates were measured in a 5-year-old Sitka alder (Alnus sinuata(Regel) Rydb.) stand. Acetylene reduction assays yielded a nitrogen fixation estimate of 35ensp;kgensp;Nensp;haminus;1yearminus;1. The biomass of leaves, stems, roots, and nodules was 13ensp;720ensp;kgensp;haminus;1and aboveground net primary production was 6000ensp;kgensp;haminus;1yearminus;1.