小兴安岭泥炭沼泽土排水改造前后营养元素生物循环的实验研究

Biological cycle of nutrient element after drainage alteration of sphagnum on Xiaoxingan mountain

研究了小兴安岭落叶松－泥炭藓沼泽排水改造前后土壤与落叶松之间的营养元素循环．排水改造后泥炭沼泽土中Ｋ、Ｃｕ、Ｂ三种元素的含量明显提高，Ｐ、Ｃｏ、Ｚｎ、Ｍｎ的含量减少，Ｎ素的含量变化不大，排水改造前后，落叶松中营养元素的含量均表现为叶＞根＞茎，并且改造后比改造前的含量增加．植物器官能选择性地从土壤中吸收营养元素，排水改造后落叶松各器官对营养元素的富集情况有所不同．

This article studies the biological cycle of nutrient element between sphagnum - bog soil and larch on Xiaoxingan mountaion. The content of K, Cu, B increase evidently after drainage alteration, while P, Co, Zn, Mn decrease. The content of nutrient element in root stick and leaf of larch is leaf>root>stick. Plant absorb selectively nutrient element from soil. Different apparatus of larch have different enrichment for nutrient element.