草业学报2012，Vol.21Issue(6)：30-41,12.
氮、磷输入对黄河口潮滩湿地不同生境下碱蓬种子萌发与幼苗生长的影响
Effects of nitrogen and phosphorus on seed germination and seedling growth of Suaeda salsa under different growth conditions of the Yellow River Estuary
摘要
Abstract
From October to November in 2010, the effects of nitrogen and phosphorus on seed germination and seedling growth of different phenotypes of Suaeda salsa under different growth conditions of the Yellow River Estuary were studied. Seed germination rates of S. salsa in the middle (JP1) and low (JP2) tidal flats reduced with increasing salinity. Under the same conditions of salinity, the JP1 germination rate was higher than that of JP2, due to growth rhythm and tidal action. Under high salinity conditions, germination rate, root/weight and root/shoot reached the maximum at a high nitrogen concentration. Thus high concentrations of nitrogen alleviated the saline toxicity. The effect of phosphorus on S. salsa was complex. Without salinity, there was no effect of phosphorus on root/weight, root/shoot, stem/weight and leaf/weight. At a salt concentration of 300 mmol/L, a moderate level of phosphorus retarded the growth of roots and stems, but favored leaf growth, and the root/shoot reached a maximum at the highest phosphorus concentration. Under high salinity conditions, S. salsa seedling growth depended on location: for JP1, root/weight and root/shoot increased as phosphorus concentration increased, and leaf/weight decreased but for JP2, the opposite changes were observed.关键词
种子萌发/碱蓬/氮和磷/盐分胁迫/黄河口Key words
seed germination/ Suaeda salsa/ nitrogen and phosphorus/ salinity stress/ Yellow River Estuary分类
农业科技引用本文复制引用
宋红丽,孙志高,孙景宽,牟晓杰,姜欢欢,孙文广..氮、磷输入对黄河口潮滩湿地不同生境下碱蓬种子萌发与幼苗生长的影响[J].草业学报,2012,21(6):30-41,12.基金项目
山东省自然科学基金重点项目(ZR2010DZ001),国家自然科学基金(41171424,40803023),中国科学院知识创新工程重要方向项目(KZCX2-YW-223),中国科学院战略性先导科技专项(XDA05030404)和中国科学院青年创新促进会人才培养基金资助. （ZR2010DZ001）
