有机酸对暗棕壤磷的持续释放效应及其动力学特征

宋金凤; 刘星平; 孙金兵; 黄文斌; 马瑞; 崔晓阳

doi:10.13332/j.1000-1522.20140008

有机酸对暗棕壤磷的持续释放效应及其动力学特征

doi: 10.13332/j.1000-1522.20140008

东北林业大学林学院

基金项目:

国家自然科学基金项目(31370613)、“973”国家重点基础研究发展计划项目(2011CB403202)、国家自然科学基金重点项目(40930107)。

详细信息

作者简介:
宋金凤,博士,副教授。主要研究方向:森林土壤学与土壤生态学。Email:songnefu@126.com 地址:150040 黑龙江省哈尔滨市香坊区和兴路26号东北林业大学林学院。责任作者: 崔晓阳,教授,博士生导师。主要研究方向:森林土壤学与土壤生态学。Email:c_xiaoyang@126.com 地址:同上。

宋金凤,博士,副教授。主要研究方向:森林土壤学与土壤生态学。Email:songnefu@126.com 地址:150040 黑龙江省哈尔滨市香坊区和兴路26号东北林业大学林学院。责任作者: 崔晓阳,教授,博士生导师。主要研究方向:森林土壤学与土壤生态学。Email:c_xiaoyang@126.com 地址:同上。

计量
- 文章访问数: 915
- HTML全文浏览量: 84
- PDF下载量: 20
- 被引次数: 0
出版历程
- 收稿日期: 2014-02-27
- 刊出日期: 2015-10-31

Sustained release and the kinetics of phosphorus from dark brown forest soils by organic acids.

School of Forestry, Northeast Forestry University, Harbin, 150040, P. R. China.

摘要

摘要: 模拟东北林区主要森林凋落物淋洗液中草酸/草酸盐和柠檬酸/柠檬酸盐浓度范围,配制0.5和2.0 mmol/L等不同浓度草酸/草酸盐和柠檬酸/柠檬酸盐溶液,分别用上述溶液以不同的浸提时间和次数浸提处理A1层暗棕壤,探讨不同浸提时间和次数处理时有机酸的磷释放效果,并确定最佳浸提时间。研究旨在探明草酸和柠檬酸对暗棕壤磷的持续活化效应,明确有机酸对暗棕壤磷素的活化程度和动力学特征。结果表明,用草酸/草酸盐和柠檬酸/柠檬酸盐浸提A1层暗棕壤时,随浸提时间延长磷释放量先增后减,有最佳浸提时间,大多数处理为12 h。从磷累积释放量上看,在1~72 h内,上述浸提剂对A1层暗棕壤的磷释放动力学能很好地用对数方程进行拟合。用草酸/草酸盐和柠檬酸/柠檬酸盐溶液连续10次和18次浸提A1层暗棕壤,第2次浸提的释磷量均大于第1次浸提,第3次后大体随浸提次数增加而下降,直到第10次或第18次时,较高浓度处理仍有一定的磷释放,特别是柠檬酸/柠檬酸盐处理;这说明,有机酸对暗棕壤中磷的释放具有累加效应。多次连续浸提时,随浸提次数增加,土壤磷的累积释放量增大,且草酸/草酸盐和柠檬酸/柠檬酸盐对A1层暗棕壤的磷累积释放量与浸提次数间都能很好地用对数方程进行拟合。
- 有机酸 /
- 暗棕壤 /
- 磷释放 /
- 浸提时间 /
- 浸提次数 /
- 动力学特征
Abstract: By simulating oxalic/oxalate and citric acid/citrate concentrations in forest litter leachates of northeast China, we prepared 0.5 and 2.0 mmol/L oxalic acid/oxalate and citrate/citrate solutions. Dark brown forest soils of A1 horizon were extracted with different concentrations of oxalic acid/oxalate and citrate/citrate solutions, in which different extraction time and frequencies were set, and the effects of extraction time and frequency on phosphorus release of dark brown forest soils by organic acids were studied, and the optimum extraction time was determined. The aims of this study were to ascertain the effects of oxalic acid and citric acid on phosphorus sustained activation from dark brown forest soils, and clarify the degrees and kinetics of phosphorus activation by organic acids from dark brown forest soils. The results showed that, when extracting A1 horizon of dark brown forest soils with oxalic acid/oxalates and citric acid/citrates, phosphorus release firstly increased and then decreased, and the optimum extraction time was 12 h. As for cumulative phosphorus release, within1--72 h, phosphorus release kinetics by the above extraction agents could be well fitted by a logarithmic equation. When extracting dark brown forest soils of A1 horizon with oxalic acid/oxalates and citric acid/citrates for 10 times and 18 times respectively, phosphorus release of the second extraction was greater than that of the first one, and after the third extraction, it generally decreased with increasing extraction times. And there were still some high concentrations of phosphorus release till the tenth or eighteenth extraction, particularly in citric acid/citrate treatments, indicating that phosphorus release caused by organic acids was cumulative. Release of cumulative phosphorus increased with increasing extraction times, and those from A1 horizon caused by oxalic acid/oxalates and citric acid/citrates and extraction times could all be well fitted by a logarithmic equation. Our study provides a theoretical basis for the better understanding of the sustained effects of organic acids on phosphorus activation under field conditions, and is of significance in practice.
- organic acids /
- dark brown forest soils /
- phosphorus release /
- extraction time /
- extraction frequency /
- kinetics

HTML全文

参考文献(26)

[1]	SHEN H, WANG X, SHI W, et al. Isolation and identification of specific root exudates in elephantgrass in response to mobilization of iron and aluminum phosphates [J]. Journal of Plant Nutrition, 2001, 24(7): 1117-1130.
[1]	GONG S G, WANG X X, ZHANG T L, et al.Release of inorganic phosphorus from red soils induced by low molecular weight organic acids [J]. Acta Pedologica Sinica, 2010, 47(4):692-697.
[2]	LIU L, LIANG C H, WANG Q, et al.Effect of low-molecular-weight organic acids on soil phosphorus release [J]. Plant Nutrition and Fertilizer Science, 2009, 15(3):593-600.
[2]	STR M L, OWEN A G, GODBOLD D L, et al. Organic acid behaviour in a calcareous soil implications for rhizosphere nutrient cycling [J]. Soil Biology and Biochemistry, 2005, 37(11):2046-2054.
[3]	龚松贵, 王兴祥, 张桃林, 等. 低分子量有机酸对红壤无机磷活化的作用[J]. 土壤学报, 2010, 47(4):692-697.
[3]	WANG Y L, HE Y Q, LI C L. Persistent activating effect of citric acid on phosphorus in red soil and its mechanism [J]. Acta Pedologica Sinica, 2007, 44(1):130-136.
[4]	PALOMO L, CLAASSEN N, JONES D L. Differential mobilization of P in the maize rhizosphere by citric acid and potassium citrate [J]. Soil Biology and Biochemistry, 2006, 38(4):683-692.
[4]	YU W Y. Study on the effect of low-molecular-weight organic acids/salt on phosphorus release of southern forest red soil [D]. Fuzhou: Fujian Agriculture and Forestry University, 2010.
[5]	LIANG Y Y, HUANG Y Z, MENG F Q, et al.Effects of organic acids on the activation of phosphorus in vegetable garden soils [J]. Acta Ecologica Sinica, 2005, 25(5):1171-1177.
[5]	刘丽, 梁成华, 王琦, 等. 低分子量有机酸对土壤磷活化影响的研究[J]. 植物营养与肥料学报, 2009, 15(3):593-600.
[6]	王艳玲, 何园球, 李成亮. 柠檬酸对红壤磷的持续活化效应及其活化机理的探讨[J]. 土壤学报, 2007, 44(1):130-136.
[6]	SONG J F, CUI X Y, WANG Z Q.Effects and mechanism of citric acid/citrate loading on phosphorus release of dark brown forest soil [J]. Journal of Soil and Water Conservation, 2008, 22(2): 182-186.
[7]	SONG J F, SONG J J, CHU Y L, et al. Effects of malic acid/malate on phosphorus availability of dark brown forest soils and absorption of forest seedlings [J]. Journal of Soil and Water Conservation, 2011, 25(5):161-167.
[7]	余文煜. 低分子有机酸、盐对南方红壤森林土壤磷的释放规律研究[D]. 福州: 福建农林大学, 2010.
[8]	梁玉英, 黄益宗, 孟凡乔, 等. 有机酸对菜地土壤磷素活化的影响[J]. 生态学报, 2005, 25(5):1171-1177.
[8]	The National Environmental Protection Bureau. Monitoring and analysis method for water and wastewater. [M].3rd ed. Beijing: China Environmental Press, 1997: 280-286.
[9]	LU W L, WANG J G,CAO Y P, et al. Kinetics of phosphorus release from soils, as affected by organic acids with low-molecular-weight [J] . Acta Pedologica Sinica, 1998, 35(4): 493-499.
[9]	宋金凤, 崔晓阳, 王政权. 柠檬酸/柠檬酸盐对暗棕壤磷的释放效应及机制[J]. 水土保持学报, 2008, 22(2): 182-186.
[10]	FENG C, YAN L, GUAN L Z.Mobilization of five different synthetic phosphate compounds by organic acids and its activation pathway [J]. Plant Nutrition and Fertilizer Science, 2011, 17(6):1395-1402.
[10]	宋金凤, 宋俊杰, 褚永磊, 等. 苹果酸/盐对暗棕壤P有效性及林木吸收的影响[J]. 水土保持学报, 2011, 25(5):161-167.
[11]	国家环保局. 水和废水监测分析方法 [M]. 3版.北京: 中国环境出版社, 1997: 280-286.
[12]	SMET J D, VANDERDEELEN J, HOFMAN G. Effect of soil properties on the kinetics of phosphate release [J].Communications in Soil Science and Plant Analysis, 1998, 29(11-14):2135-2147.
[13]	VAN DERZEE S E A T M, FOKKINK L G J, VAN RIEMSDIJK W H. A new technique for assessment of reversibly adsorbed phosphate [J]. Soil Science Society of America Journal, 1987, 51(3):599-604.
[14]	KPOMBLEKOU A K, TABATABAI M A. Effect of low-molecular weight organic acids on phosphorus release and phytoavailability of phosphorus in phosphate rocks added to soils [J]. Agriculture Ecosystems and Environment, 2003, 100(2):275-284.
[15]	陆文龙, 王敬国, 曹一平, 等. 低分子量有机酸对土壤磷释放动力学的影响[J]. 土壤学报, 1998, 35(4): 493-499.
[16]	冯晨, 颜丽, 关连珠. 有机酸对五种人工合成磷酸盐活化作用及活化途径的研究[J]. 植物营养与肥料学报, 2011, 17(6):1395-1402.