Understanding the characteristics and influences of various factors on phosphorus(P)fractions is of significance for promoting the efficiency of soil P.Based on long-term experiments on black soil,fluvo-aquic soil,and loess soil,which belong to Phaeozems,Cambisols,and Anthrosols in the World Reference Base for Soil Resources(WRB),respectively,five fertilization practices were selected and divided into three groups:no P fertilizer(CK/NK),balanced fertilizer(NPK/NPKS),and manure plus mineral fertilizer(NPKM).Soil inorganic P(Pi)fractions and soil properties were analyzed to investigate the characteristics of the Pi fractions and the relationships between Pi fractions and various soil properties.The results showed that the proportion of Ca10-P in the sum of total Pi fractions was the highest in the three soils,accounting for 33.5％in black soil,48.8％in fluvo-aquic soil,and 44.8％in loess soil.Long-term fertilization practices resulted in periodic changes in soil Pi accumulation or depletion.For black soil and fluvo-aquic soil,the Pi accumulation was higher in the late period(10-20 years)of fertilization than in the early period(0-10 years)under NPK/NPKS and NPKM,whereas the opposite result was found in loess soil.The Pi accumulation occurred in all Pi fractions in black soil;mainly in Ca8-P,Fe-P,and Ca10-P in fluvo-aquic soil;and in Ca2-P,Ca8-P,and O-P in loess soil.Under CK/NK,the soil Pi was depleted mainly in the early period in each of the three soils.In addition to the labile Pi(Ca2-P)and moderately labile Pi(Ca8-P,Fe-P,Al-P),the Ca10-P in black soil and fluvo-aquic soil and O-P in loess soil could also be used by crops.Redundancy analysis showed that soil properties explained more than 90％of the variation in the Pi fractions in each soil,and the explanatory percentages of soil organic matter(SOM)were 43.6％in black soil,74.6％in fluvo-aquic,and 38.2％in loess soil.Consequently,decisions regarding the application of P fertilizer should consider the accumulation rate and the variations in Pi fractions driven by soil properties in non-acidic soils.

ZHANG Nai-yu;WANG Qiong;ZHAN Xiao-ying;WU Qi-hua;HUANG Shao-min;ZHU Ping;YANG Xue-yun;ZHANG Shu-xiang

Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences/National Engineering Laboratory for Improving Quality of Arable Land,Beijing 100081,P.R.China;TERRA,Gembloux Agro-Bio Tech,University of Liege,Gembloux 5030,Belgium;Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences,Beijing 100081,P.R.China;Institute of Bioengineering,Guangdong Academy of Sciences/Guangdong Modern Agricultural Technology Research and Development Center,Guangzhou 510316,P.R.China;Institute of Plant Nutrient,Agricultural Resources and Environmental Sciences,Henan Academy of Agricultural Sciences,Zhengzhou 450002,P.R.China;Institute of Agricultural Resources and Environment,Jilin Academy of Agricultural Sciences,Changchun 130033,P.R.China;College of Natural Resources and Environment,Northwest A&F University,Yangling 712100,P.R.China

农业科学学报（英文）

[1]ZHANG Nai-yu;WANG Qiong;ZHAN Xiao-ying;WU Qi-hua;HUANG Shao-min;ZHU Ping;YANG Xue-yun;ZHANG Shu-xiang-.Characteristics of inorganic phosphorus fractions and their correlations with soil properties in three non-acidic soils)[J].农业科学学报（英文）,2022(12):3626-3636

Phaeozems,Cambisols,Anthrosols

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