Agronomic threshold of soil available phosphorus in grey desert soils in Xinjiang, China

2nd International Conference on Agricultural and Biological Sciences

农业科学;生物科学

Wang, B.^1 ; Liu, H.^1 ; Hao, X.Y.^2 ; Wang, X.H.^1 ; Sun, J.S.^1 ; Li, J.M.^3 ; Ma, Y.B.^3

Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi

830091, China^1

Agriculture and Agri-Food Canada, Lethbridge Research Centre, 5403 1st Ave. S., AB, Lethbridge

T1J 4B1, Canada^2

National Soil Fertility and Fertilizer Effects Long-term Monitoring Network, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing

100081, China^3

关键词: Available phosphorus;    Desert soils;    Fertilizer management;    Linear plateaux;    Olsen-p;    Threshold model;    Xinjiang;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/41/1/012010/pdf
DOI  :  10.1088/1755-1315/41/1/012010

来源: IOP

【 摘 要 】

Based on 23 years of data, yields of maize, wheat and cotton were modelled under different fertilizer management practices and at different levels of available phosphorus (Olsen-P) in soil. Three types of threshold models were used, namely linear-linear (LL), linear- plateau (LP), and Mitscherlich type exponential (Exp). The agronomic thresholds of available phosphorus were 25.4 mgkg-1for cotton, 14.8 mgkg-1for wheat, 13.1 mgkg-1for maize and 25.4 mgkg-1for the grey desert soil regions of Xinjiang in China as a whole.