摘要
以蓝灰类型玉簪‘蓝伞’(Hosta‘Blue Umbrella’)为材料,研究了4种光强(自然光照的100%、50%、30%、10%)和4种氮素水平(盆栽土施尿素量0、0.5、1.5和2.5g.kg-1)处理对玉簪生长和光合特性的影响。结果表明:‘蓝伞’玉簪的生长和光合特性受光强、氮素水平以及光氮互作的影响。在同一氮素水平下,随着光照强度的减弱,玉簪的生物量、叶面积、叶片数、光合速率及可溶性蛋白含量均表现先上升后下降的趋势,在30%~50%光强下达到最大值;叶绿素含量则随光强的减弱而增加。在同一光照强度下,随着氮素水平的升高,玉簪的生物量、叶面积、叶片数、光合速率及叶绿素和可溶性蛋白含量均呈先上升后下降的趋势,在0.5g.kg-1氮素水平下达到最大值。
The single and interactive effects of nitrogen application rate and light conditions on Hosta ‘Blue Umbrella' growth and photosynthetic characteristics were studied in this paper. The Hosta was cultivated with sands under four kinds of light conditions ( 100%, 50%, 30% and 10% of natural sunlight respectively) and four kinds of nitrogen application rates (0, 0. 5, 1.5 and 2.5 g · kg^-1 soil respectively). Results showed that biomass, growth characters, photosynthetic rate and soluble protein content increased at first and then decreased as light density decreased in the same nitrogen application rate, the suitable light intensities for Hosta ‘Blue Umbrella' were 30% to 50% of natural sunlight. However, chlorophyll contents increased as light density decreased in the same nitrogen application rate. In the different nitrogen application rate, biomass, growth characters, photosynthetic characteristic, chlorophyll and soluble protein content increased at first and then decreased as nitrogen application rate increased, the suitable nitrogen application rate for Hosta ‘Blue Umbrella' was 0. 5 g · kg^-1.
出处
《园艺学报》
CAS
CSCD
北大核心
2007年第6期1497-1502,共6页
Acta Horticulturae Sinica
基金
中国科学院方向性项目(KSCXZ-YWN-44-03)
中科院植物所前沿项目(110600J005)
关键词
玉簪
氮素
光照强度
互作
生长
光合特性
Hosta
Nitrogen
Light intensity
Interaction
Growth
Photosynthesis characteristics