硝态氮与氨态氮对大豆幼苗生长及氮素积累的影响

• 作 者: 宋海星 申斯乐 闫石 马淑英 孙晶霞
• 机 构: 中国人民解放军农牧大学,长春市效区农业技术推广站
• 出 处: 大豆科学
• 发表日期: 1997年02期
• 关键词: 大豆幼苗 氨态氮 硝态氮含量 幼苗长势 氮素形态 全氮含量 大豆种子 叶中 鲜重 试验设计

无论是ＮＯ－３－Ｎ，还是ＮＨ＋４－Ｎ使用单一氮源大豆幼苗长势均不如二者混合。以ＮＯ－３－Ｎ或混合氮为氮源时，幼苗生长受ｐＨ值影响较小，而以ＮＨ＋４－Ｎ为氮源时，ｐＨ７．５时幼苗生长明显优于ｐＨ５．５。在本试验设计的七种氮素形态配比中，大豆茎叶全氮含量高低的顺序为ＮＯ－３－Ｎ∶ＮＨ＋４－Ｎ３∶１＞５∶１＞１∶１＞１∶３＞１∶５＞１∶０＞０∶１，与株高及鲜重的顺序相一致。随着营养液中ＮＯ－３－Ｎ比例的增加，茎叶中硝态氮含量增加；同样随着营养液中ＮＨ＋４－Ｎ比例的增加，茎叶中氨态氮含量增加

Both NO-3-N and NH + 4-N use a single source of nitrogen for seedling growth. When NO-3-N or mixed nitrogen was used as nitrogen source, the seedling growth was less affected by pH value. When NH + 4-N was used as nitrogen source, the seedling growth at pH7.5 was significantly better than that of pH5.5. In this experiment, the order of total nitrogen content in stems and leaves of soybean was NO-3-N: NH + 4-N 3:1> 5:1> 1:1> 1:3> 1: 5> 1: 0> 0: 1, consistent with the order of plant height and fresh weight. With the increase of NO-3-N ratio in nutrient solution, the content of nitrate nitrogen in stems and leaves increased. With the increase of NH + 4-N ratio in nutrient solution, the content of ammonia nitrogen in stems and leaves increased