摘要
通过对４种以２：１型粘上矿物为主的土壤所进行的盆栽黑麦草试验，结果表明，Ｋ￣＋，Ｎａ￣＋，Ｃａ￣（２＋）等阳离子不仅影响粘上矿物对ＮＨ￣＋＿４的固定量，更重要的是它们对矿物固定态铵的释放有截然不同的影响。Ｎａ￣＋，Ｃａ￣（２＋）有助于２：１型粘上矿物层间铵的释放，而Ｋ￣＋却阻止ＮＨ￣＋＿４的释放，最终导致了黑麦草吸氮量的不同。
Pot experiment was conducted to determine the effect of cations,namely,K￣+, Na￣+ and Ca￣(2+)on the fixation and release of ammonium in soils.Four soils were dominated with 2:1 clay minerals.Rye-grass was chosen as a testing crop.Results showed the cations tested did affect the anlmonium fixation capac-ity,but in different way。 Na￣+ and Ca￣(2+) facilitated the release of fixed NH￣ +_4 while K￣+ hampered.
出处
《江苏农学院学报》
CSCD
1994年第3期1-5,共5页
Jiangsu Agricultural Research
基金
国家自然科学基金
关键词
土壤
阳离子
铵固定
释放
soils:cations
ammoniurn fixation /release
