西南林业大学学报2013，Vol.33Issue(3)：8-14,19,8.DOI:10.3969/j.issn.2095-1914.2013.03.002
氮磷水平对中美山杨幼苗碳氮积累与分配的影响
Effect of N and P Supply Levels on C and N Accumulation and Distribution in Populus davidiana × P.tremuloides Seedlings
摘要
Abstract
The biomasses of root system,stem and leaves,the photosynthesis,the carbon (C) and nitrogen (N) accumulation and distribution of Populus davidiana × P.tremuloides seedlings under 4 different N and 4 phosphorus (P) nutrition levels were studied by sand culture in greenhouse.The results showed that the dry biomasses of different organs,the chlorophyll content,the photosynthesis rate and C and N accumulation were all influenced by N levels.The aboveground biomass was the highest under middle level of N nutrition supply (8 mmol/L),while the biomass of root system was the highest under lower N level (4 mmol/L).Both of the highest total biomass and the highest aboveground biomass were obtained at the intermediate P level (1.000 mmol/L).The contents of chlorophyll a,chlorophyll b,chlorophyll (a + b) and carotenoid content all increased along with the N concentration varied from the lowest level (1 mmol/L) to the highest level (16 mmol/L).But the four indexes were not significantly correlated with different P concentrations.In general,higher N level was more beneficial to the C and N accumulation of root system.But the C and N accumulation in the stem and leaves reached the highest at the intermediate N level.The different P level did not affect much on the C and N accumulation in the seedlings.关键词
中美山杨/氮磷水平/碳氮积累/碳氮分配Key words
Populus davidiana × P.tremuloides/nitrogen and phosphorus supply levels/carbon and nitrogen accumulation/carbon and nitrogen distribution分类
农业科技引用本文复制引用
李海霞,李正华,戴伟男,卓泳杉..氮磷水平对中美山杨幼苗碳氮积累与分配的影响[J].西南林业大学学报,2013,33(3):8-14,19,8.基金项目
黑龙江省森工总局青年基金项目(sgzjQ2011003)资助 （sgzjQ2011003）
黑龙江省科技攻关重大项目(GA09B202-02)资助 （GA09B202-02）
黑龙江省森工总局科技计划项目(sgzjY2010012)资助. （sgzjY2010012）
