Effects of Long-Term Located Fertilization on Evolution of Available Phosphorus and Phosphorus Pool in Shandong Fluvo-aquic Soil
Zhong Ziwen
Sun Cuiping
Zhang Yingpeng
Sun Ming
Jing Yongping
Luo Jiafa
Bo Luji
Li Yan
Abstract：To study the effects of long-term located fertilization on soil phosphorus,the changes of soil available phosphorus (Olsen-P),the evolution of soil total phosphorus (TP) and the ratio change of Olsen-P to TP (PAC) were studied by 33-year fertilization experiments in winter wheat-summer maize rotation system in Shandong fluvo-aquic soil.Eight treatments were designed as no fertilization (CK),nitrogen fertilizer (N),nitrogen and phosphate fertilizer (NP),nitrogen and potassium fertilizer (NK),phosphate and potassium fertilizer (PK),nitrogen-phosphate-potassium fertilizer (NPK),reduced NPK fertilizer (N15PK),increased NPK fertilizer (N25PK).At the same time,eight organic fertilizer added treatments were designed based on the application of inorganic fertilizer same as the above ones.The results showed that TP,Olsen-P and PAC of organic fertilizer added treatments were higher than those without organic fertilizer,and those of the treatments adding phosphate fertilizer were higher than those of no phosphate fertilizer.With the increase of years,soil P pool reduced due to crop absorption,nutrient loss and morphological transformation and other causes under the treatments of without and only phosphate fertilizer,while remained stable under the treatments adding organic fertilizer.The PAC values were generally lower in fluvo-aquic soils,and it could be improved by the application of organic fertilizer.On the whole,the application of chemical phosphate fertilizer combined with organic fertilizer could improve the phosphorus content in soil and ensure the supply of phosphorus nutrition,which provided scientific basis for fertilization management and soil fertility in fluvo-aquic soil.
Keywords：Long-term located fertilizationFluvo-aquic soilTotal phosphorusAvailable phosphorusPhosphorus poolActivity coefficient
Publication Date：2017-12-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 59-67 )