›› 2019, Vol. 31 ›› Issue (7): 1128-1137.DOI: 10.3969/j.issn.1004-1524.2019.07.13

• Environmental Science • Previous Articles     Next Articles

Dynamics of soil phosphorus in paddy-upland rotation paddy soil under different fertilization modes

WU Chunyan1, LIU Xiaoxia2, CHEN Yi1, LI Yan1, TANG Xu1, LU Ruohui2,*   

  1. 1. Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
    2. Zhejiang Cultivated Land Quality and Fertilizer Administration Station, Hangzhou 310020, China
  • Received:2018-12-18 Online:2019-07-25 Published:2019-08-07

Abstract: The changes of phosphorus in topsoil under paddy-upland rotation was studied through a long-term field fertilizer experiment. It was shown that the contents of total phosphorus and Olsen-P exhibited a decreasing trend without P supply, and the soil P balance was defect; while the contents of total phosphorus and Olsen-P exhibited an increasing trend with P supply either in organic or inorganic form. With organic P supply, the contents of total phosphorus and Olsen-P increased more rapidly than that with inorganic P supply, and the soil P balance was surplus. Under the experiment conditions, phosphorus input should not exceed 13.5, 42.4, 31.6 kg·hm-2 in barley, rice, rape growing season, respectively, to meet the crop growth requirement and keep soil Olsen-P balance.

Key words: long-term experiment, phosphorus balance, soil available phosphorus

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