Effect of soil changes caused by red alder (Alnusrubra) on biomass and nutrient status of Douglas-fir (Pseudotsugamenziesii) seedlings
Effect of soil changes caused by red alder (Alnusrubra) on biomass and nutrient status of Douglas-fir (Pseudotsugamenziesii) seedlings
复制标题
红桤木 (Alnusrubra) 引起的土壤变化对花旗松 (Pseudotsugamenziesii) 幼苗生物量和养分状况的影响
DOI：
10.1139/x90-175
复制
发表时间：
1990
影响因子：
2.2
通讯作者：
S. Brożek
中科院分区：
文献类型：
--
作者：
S. Brożek
研究了红桤木（Alnusrubra Bong.）对花旗松（Pseudotsugamenziesii（Mirb.）Franco）幼苗的测定是通过比较前花旗松和红桤木站点上种植的两个相邻地块的幼苗。生长在前红桤木网站上的幼苗表现出65%的生物量增加目前的树枝，41%的老树枝增加，45%的茎增加。叶和根没有受到显着影响。幼苗的根系也比以前被花旗松占据的地方浅，但更宽。幼苗在红桤木网站表现出增加N和减少P，Ca和Mg的浓度。氮磷比和氮钾比较高，土壤磷的有效性较低，土壤中可提取磷的消耗加快。幼苗的营养差异和生物量的变化可以部分归因于前红桤木林土壤中积累的N和有机质。
The effect of soil changes caused by red alder (Alnusrubra Bong.) on the biomass and nutrition of Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) seedlings was determined by comparing two adjacent plots of seedlings planted on former Douglas-fir and red alder sites. The seedlings grown on the former red alder site showed a 65% biomass increase in current twigs, 41% increase in older twigs, and 45% increase in stems. Foliage and roots were not significantly affected. The seedlings also developed shallower but wider root systems than those on the site formerly occupied by Douglas-fir. The seedlings on the red alder site showed an increase in N and decrease in P, Ca, and Mg concentrations. There were also higher N/P and N/K ratios and lower availability of soil P. Accelerated depletion of extractable P in soil was observed. Nutritional differences and biomass changes in seedlings can be attributed in part to the N and organic matter accumulated in the soil by the former red alder forest.