Effects of Low Molecular-weight Organic Acids on P,Fe and K Availability of Dark Brown Forest Soils and Absorption of Forest Seedlings

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- Effects of Low Molecular-weight Organic Acids on P,Fe and K Availability of Dark Brown Forest Soils and Absorption of Forest Seedlings
- Vol. 25, Issue 1, (2011)
- 作者机构：
  
  东北林业大学,黑龙江,哈尔滨,150040
- 作者简介：
- 基金信息：
- DOI：
  CLC： S158.3
- Published：2011
- 稿件说明：
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SONG Jin-feng, CUI Xiao-yang, WANG Zheng-quan. Effects of Low Molecular-weight Organic Acids on P,Fe and K Availability of Dark Brown Forest Soils and Absorption of Forest Seedlings[J]. 2011, 25(1).
DOI：

SONG Jin-feng, CUI Xiao-yang, WANG Zheng-quan. Effects of Low Molecular-weight Organic Acids on P,Fe and K Availability of Dark Brown Forest Soils and Absorption of Forest Seedlings[J]. 2011, 25(1). DOI：

模拟东北林区森林凋落物淋洗液中低分子有机酸浓度范围

研究了不同浓度外源草酸、柠檬酸溶液对暗棕壤中P、Fe、K等养分元素有效性、以及落叶松和水曲柳幼苗吸收P、Fe、K的影响.结果表明

合适浓度的草酸和柠檬酸促进暗棕壤中磷的活化

并促进落叶松和水曲柳苗木根系对磷的吸收

但较高浓度时(50.0 mmol/L)水曲柳叶片含磷量却降低;合适浓度草酸和柠檬酸促进暗棕壤中Fe、K等金属元素的活化释放

并促进落叶松和水曲柳幼苗对Fe、K的吸收和运输;在有机酸活化土壤P、Fe、K养分、促进林木吸收的过程中

柠檬酸的作用效果强于同浓度草酸

这主要与柠檬酸较强的络合能力及较大的解离常数有关.

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