浙江农林大学学报2012，Vol.29Issue(6)：817-821,5.
盐胁迫下施氮对海滨锦葵营养生长期生长的影响
Growth of salt stressed Kosteletzkya virginica with addition of nitrogen
摘要
Abstract
Kostelezkya virginica, an important economic plant with strong saline tolerance, was tested to better understand the effects of nitrogen additions on biomass characteristics and their relationship to K. virginica seedlings undergoing salt stress. Using completely random design, seedlings with 3-4 leaves were exposed for 35 d to treatments of 50, 150, and 250 mmol-L-1 NaCl and treatments of 50, 150, and 250 mmol·L-1 NaCl + 15 mmol·L-1 NH4NO3 with 5 replications. Results showed that N addition significantly increased stem heights (P<0.05), but did not affect axial root length. For 50 mmol·L-1 NaCl + 15 mmol·L-1 NH4NO3, the average stem height was 26.1 cm, but without N it was 18.9 cm; and with N the average axial root diameter was 9.2 mm, but without N it was 6.8 mm. Additionally, leaf-weight ratios increased significantly (P<0.05) with N addition. Using 250 mmol·L1 NaCl + 15 mmol·L-1 NH4NO3, leaf-weight ratios were 0.25 g·g-1, but without N they were 0.14 g·g-1. Root-weight ratios and root-to-shoot ratios significantly decreased (P<0.05) with N additions. Also, N inhibited fine root growth; whereas it promoted leaf growth. Finally, N significantly strengthened (P<0.05) the relationship between root mass and leaf mass. This could be helpful for utilization and关键词
植物学/氮添加/海滨锦葵/生物量/关联性Key words
botany/nitrogen addition/Kosteletzkya virginica/biomass/correlation分类
农业科技引用本文复制引用
闫道良,连俊方,任燕燕,盛琳杰,钦佩..盐胁迫下施氮对海滨锦葵营养生长期生长的影响[J].浙江农林大学学报,2012,29(6):817-821,5.基金项目
"十一五"国家科技支撑计划项目(2006BAD09A04,2006BAD09A08) （2006BAD09A04,2006BAD09A08）
浙江农林大学人才启动基金资助项目(2034020060) （2034020060）
