| 摘要: |
| 在采自不同地区的8种土壤上进行盆栽试验，研究菠菜不同器官硝态氮与钾素的含量及关系。结果表明，菠菜体内的硝态氮和钾素含量因器官而异，且两者在不同器官的分布表现出相反的趋势，即叶片的钾素含量最高，根次之，叶柄最低；硝态氮含量的分布以叶柄最高，根次之，叶片最低。在每千克土施氮0.15和0.30 g时，菠菜各器官硝态氮和钾素含量的相关系数分别为－0.398和－0.493，说明钾素含量高的器官，硝态氮还原转化速度较快。 |
| 关键词: 菠菜 硝态氮 钾素 |
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| 基金项目:国家自然科学基金资助项目(39970429);陕西省星火计划;杨凌科技开发基金项目(2000J-01) |
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| Contents of nitrate-N and K in different organs of spinach and its relationship |
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| Abstract: |
| Pot experiments were carried out on 8 different soils sampled from different sites using spinach as indicating crop,to study the contents of nitrate N and K in different organs of spinach and its relationship.The obtained results showed that both the contents of nitrate N and K were different with organs,and their distribution among different organs showed an opposite tendency.The K contents of blades were the highest,then of the roots,and those of stems were the lowest,but the nitrate N contents of blades were the lowest,then of the roots,and those of stems were the highest.Correlation analysis indicated that the coefficient (r) was -0.398 and -0.493 at 0.15,0.30 g/kg soil respectively.This kind of tendency between K and nitrate N in different organs indicated that higher potassium content could promote the transformation and reduction of nitrate. |
| Key words: spinach nitrate-N content K content |
