Olsen P评估植物有效磷的有效性和土壤P吸附参数及它们间的关系
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摘要
为了查明Olsen法(碳酸氢钠提取态磷)是否适用于酸性土壤有效磷的测定,土壤P吸附参数及它们之间的关系,利用同质地不同磷含量酸性土壤提供了这方面的信息。结果表明,Olsen法适用于酸性土壤植物有效磷的测定,Olsen P与植物磷吸收量表现出极显著相关。磷最大吸附量(Qm)与磷吸附强度(K)显著负相关。土壤缓冲容量随取样次数增加逐步减少,第3次取样时,土壤缓冲容量高磷处理(P3)>中磷处理(P2)>低磷处理(P1)>无磷处理(P0),说明随着生长时间增加,作物从土壤带走磷量增加,含磷量低的土壤磷缓冲容量随之降低。Olsen P与Qm,K均无显著相关,但土壤磷吸附饱和度、Olsen P均证实,实验用土壤目前不会因增加施磷量而引发环境问题。磷吸附参数与Olsen P从环境和农业生产需求两方面说明了土壤磷素丰缺状况。
The aim of this study was to assess the feasibility of bicarbonate-extractable P(Olsen P) on detecting plant available P in acid soil and analyze phosphorus(P) sorption characteristics in soil and their relationships with Olsen P. Results showed that plant available P could be estimated by Olsen P in this acid soil and an extremely significant correlation between Olsen P and plant available P was observed. Phosphorous sorption was characterized by Langmuir equation summarized by three sorption parameters: P sorption maximum(Qm), P sorption strength(K), and P saturation degree. P adsorption maximum(Qm) had a significant negative correlation with P sorption strength(K). The soil P buffer capacity decreased over time. At the third soil sampling time, P buffer capacity was the highest with the highest P rate(P3) followed by the second P rate(P2), the lowest P rate(P1), and P0(no P adding) in the 75 th day sampling soils. This suggested that adsorption of P by crops may decrease soil buffer capacity due to a lower P content than other soils. Qm and K were not significantly correlated to Olsen P. However, P saturation degree and Olsen P confirmed that an increase of P application could not cause environmental issues. P status in soil can be characterized by P adsorption parameters and Olsen P.
The aim of this study was to assess the feasibility of bicarbonate-extractable P(Olsen P) on detecting plant available P in acid soil and analyze phosphorus(P) sorption characteristics in soil and their relationships with Olsen P. Results showed that plant available P could be estimated by Olsen P in this acid soil and an extremely significant correlation between Olsen P and plant available P was observed. Phosphorous sorption was characterized by Langmuir equation summarized by three sorption parameters: P sorption maximum(Qm), P sorption strength(K), and P saturation degree. P adsorption maximum(Qm) had a significant negative correlation with P sorption strength(K). The soil P buffer capacity decreased over time. At the third soil sampling time, P buffer capacity was the highest with the highest P rate(P3) followed by the second P rate(P2), the lowest P rate(P1), and P0(no P adding) in the 75 th day sampling soils. This suggested that adsorption of P by crops may decrease soil buffer capacity due to a lower P content than other soils. Qm and K were not significantly correlated to Olsen P. However, P saturation degree and Olsen P confirmed that an increase of P application could not cause environmental issues. P status in soil can be characterized by P adsorption parameters and Olsen P.
引文
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[18]RENNESON M,VANDENBERGHE C,DUFEY J,et al.Degree of phosphorus saturation in agricultural loamy soils with a near neutral p H[J].Eur J Soil Sci,2015,66(1):33-41.
[19]ANGHINONI I,BALIGAR V C,WRIGHT R J.Phosphorus sorption isotherm characteristics and availability parameters of Appalachian acidic soils[J].Commun Soil Sci Plan,1996,27(9/10):2033-2048.
[20]LABOSKI C A M,LAMB J A.Impact of manure application on soil phosphorus sorption characteristics and subsequent water quality implications[J].Soil Sci,2004,169:440–448.
[2]WANG Y T,O’HALLORN I P,ZHANG T Q,et al.Phosphorus sorption parameters of soils and their relationships with soil test phosphorus[J].Soil Sci Soc Am J,2015,79(2):672-680.
[3]SIMS J T,EDWARDS A C,SCHOUMANS O F,et al.Integrating soil phosphorus testing into environmentally based agricultural management practices[J].J Environ Qual,2000,29:60-71.
[4]OLSEN S R,COLE C V,WATANABE F S,et al.Estimation of available phosphorus in soils by extraction with sodium bicarbonate[R].Washington DC:USDA Circular939,US Government Printing Office,1954.
[5]HARTONO A,FUNAKAWA S,KOSAKI T.Transformation of added phosphorus to acid upland soils with different soil properties in Indonesia[J].Soil Sci Plant Nutr,2006,52(6):734-744.
[6]KAMPERTH E J,FOX R L.Phosphate sorption isotherms for evaluating the phosphate requirements of soils[J].Soil Sci Soc Am J,1970,34(6):902-907.
[7]ROY A C,DATTA DE S K.Phosphate sorption isotherms for evaluating phosphorus requirement of wetland rice soils[J].Plant Soil,1985,86(2):185-196.
[8]SHARPLEY A N.Dependence of runoff phosphorus on extractable soil phosphorus[J].J Environ Qual,1995,24(5):920-926.
[9]PAUTLER M C,SIMS J T.Relationships between soil test phosphorus,soluble phosphorus,and phosphorus saturation in Delaware soils[J].Soil Sci Soc Am J,2000,64(2):765-773.
[10]B?RLING K,OTABBONG E,BARBERIS E.Soil variables for predicting potential phosphorus release in Swedish non calcareous soils[J].J Environ Qual,2004,33(1):99-106.
[11]SIMS J T,SIMARD R R,JOERN B C.Phosphorus loss in agricultural drainage:Historical perspective and current research[J].J Environ Qual,1998,27:277-293.
[12]MAGDOFF F R,HRYSHKO C,JOKELA W E,et al.Comparison of phosphorus soil test extratants for plant availability and environmental assessment[J].Soil Sci Soc Am J,1999,63(4):999-1006.
[13]DELGADO A,SCALENGHE R.Aspects of phosphorus transfer in Europe[J].J Plant Nutr Soil Sc,2008,171:552–575.
[14]鲁如坤.土壤农化分析法[M].北京:中国农业科技出版社,1999.
[15]DELGADO A,TORRENT J.Phosphate-rich soils in the European Union:estimating total plant-available phosphorus[J].Eur J Agron,1997,6(3/4):205-214.
[16]BARROW N J.Reaction of anions and cations with variable charge soils[J].Adv Agron,1985,38:183-230.
[17]YLI-HALLA M,HARTIKAINEN H,V??T?INEN P.Depletion of soil phosphorus as assessed by several indices of phosphorus supplying power[J].Eur J Soil Sci,2002,53(3):431-438.
[18]RENNESON M,VANDENBERGHE C,DUFEY J,et al.Degree of phosphorus saturation in agricultural loamy soils with a near neutral p H[J].Eur J Soil Sci,2015,66(1):33-41.
[19]ANGHINONI I,BALIGAR V C,WRIGHT R J.Phosphorus sorption isotherm characteristics and availability parameters of Appalachian acidic soils[J].Commun Soil Sci Plan,1996,27(9/10):2033-2048.
[20]LABOSKI C A M,LAMB J A.Impact of manure application on soil phosphorus sorption characteristics and subsequent water quality implications[J].Soil Sci,2004,169:440–448.