title: [Dynamics of soil phosphorus adsorption-desorption in maize/soybean relay intercropping system in purple hilly area].
abstract: Field plot experiment was carried out to study the effect of phosphorus application on soil phosphorus adsorption-desorption characteristics under three cropping patterns including maize/soybean relay intercropping (M/S), maize monoculture (M), and soybean monoculture (S). Results showed that without phosphorus fertilization, the system crop yield under M/S was increased by 9.8% and 79. 1% compared with that of M and S, respectively, and the land equivalent ratio (LER) was 1.58. With phosphate fertilizer application, the system crop yield under M/S was increased by 10.4% and 80.3% compared with that of M and S, respectively, and the LER was 1.62. The system crop yields under M/S, M and S with phosphate fertilizer application were increased by 12.7%, 12. 2% and 17. 6%, respectively, compared with that without phosphorus fertilization. Among three cropping patterns, the soil buffer capacity (SBC) values were in the order of M/S>M >S regardless of phosphate fertilizer applied or not. The SBC values of M/S, M and S without phosphate fertilizer application were reduced by 19.6%, 30.3% and 12.0% compared with phosphate fertilizer application treatments, respectively. The soil desorption per absorption (b) values of the three cropping patterns with phosphate fertilizer application were in the order of M/S>M>S, and the b values increased by 10.9%, 39.1% and -9.6%, respectively, compared with non phosphate fertilizer application. The soil phosphorus maximum absorption (Qm) and soil phosphorus desorption rate also showed the same trend.
authors.forename: Min
authors.initials: M
authors.lastname: Xu
authors.forename: Chun
authors.initials: C
authors.lastname: Song
authors.forename: Wei
authors.initials: W
authors.lastname: Dai
authors.forename: Xia
authors.initials: X
authors.lastname: Xiao
authors.forename: Lu
authors.initials: L
authors.lastname: Mao
authors.forename: Xiao-chun
authors.initials: XC
authors.lastname: Wang
authors.forename: Wen-yu
authors.initials: WY
authors.lastname: Yang
mesh_terms: D000327:Adsorption; D000383:Agriculture / Q000379:methods*; D005308:Fertilizers; D010710:Phosphates; D010758:Phosphorus / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D013025:Glycine max / Q000254:growth & development*; D003313:Zea mays / Q000254:growth & development*
chemical_list: D005308:Fertilizers; D010710:Phosphates; D012987:Soil; D010758:Phosphorus