Journal of Integrative Agriculture ›› 2016, Vol. 15 ›› Issue (1): 200-208.DOI: 10.1016/S2095-3119(14)60947-3

• 论文 • 上一篇    下一篇

Long-term phosphorus accumulation and agronomic and environmtal critical phosphorus levels in Haplic Luvisol soil, northern China

 XI Bin, ZHAI Li-mei, LIU Jian, LIU Shen, WANG Hong-yuan, LUO Chun-yan, REN Tian-zhi, LIU Hong-bin   

  1. 1、Key Laboratory of Nonpoint Source Pollution Control, Ministry of Agriculture/Institute of Agricultural Resources and Regional
    Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
    2、USDA-Agricultural Research Service, Pasture Systems and Watershed Management Research Unit, PA 16802, USA
    3、Institute of Agro-Environmental Protection, Ministry of Agriculture, Tianjin 300191, P.R.China
  • 收稿日期:2014-10-23 出版日期:2016-01-08 发布日期:2016-01-11
  • 通讯作者: LIU Hong-bin, Tel: +86-10-82108763,Fax: +86-10-82106225, E-mail: liuhongbin@caas.cn
  • 基金资助:

    This work was financially supported by the National Natural Science Foundation of China (41203072) and the Special Fund for Agro-Scientific Research in the Public Interest from Ministry of Agriculture of China (20100314).

Long-term phosphorus accumulation and agronomic and environmtal critical phosphorus levels in Haplic Luvisol soil, northern China

 XI Bin, ZHAI Li-mei, LIU Jian, LIU Shen, WANG Hong-yuan, LUO Chun-yan, REN Tian-zhi, LIU Hong-bin   

  1. 1、Key Laboratory of Nonpoint Source Pollution Control, Ministry of Agriculture/Institute of Agricultural Resources and Regional
    Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
    2、USDA-Agricultural Research Service, Pasture Systems and Watershed Management Research Unit, PA 16802, USA
    3、Institute of Agro-Environmental Protection, Ministry of Agriculture, Tianjin 300191, P.R.China
  • Received:2014-10-23 Online:2016-01-08 Published:2016-01-11
  • Contact: LIU Hong-bin, Tel: +86-10-82108763,Fax: +86-10-82106225, E-mail: liuhongbin@caas.cn
  • Supported by:

    This work was financially supported by the National Natural Science Foundation of China (41203072) and the Special Fund for Agro-Scientific Research in the Public Interest from Ministry of Agriculture of China (20100314).

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摘要： Sufficient soil phosphorus (P) content is essential for achieving optimal crop yields, but accumulation of P in the soil due to excessive P applications can cause a risk of P loss and contribute to eutrophication of surface waters. Determination of a critical soil P value is fundamental for making appropriate P fertilization recommendations to ensure safety of both environment and crop production. In this study, agronomic and environmental critical P levels were determined by using linear-linear and linear-plateau models, and two segment linear model, for a maize (Zea mays L.)-winter wheat (Triticum aestivum L.) rotation system based on a 22-yr field experiment on a Haplic Luvisol soil in northern China. This study included six treatments: control (unfertilized), no P (NoP), application of mineral P fertilizer (MinP), MinP plus return of maize straw (MinP+StrP), MinP plus low rate of farmyard swine manure (MinP+L.Man) and MinP plus high rate of manure (MinP+ H.Man). Based on the two models, the mean agronomic critical levels of soil Olsen-P for optimal maize and wheat yields were 12.3 and 12.8 mg kg−1, respectively. The environmental critical P value as an indicator for P leaching was 30.6 mg Olsen-P kg−1, which was 2.4 times higher than the agronomic critical P value (on average 12.5 mg P kg−1). It was calculated that soil Olsen-P content would reach the environmental critical P value in 41 years in the MinP treatment, but in only 5–6 years in the two manure treatments. Application of manure could significantly raise soil Olsen-P content and cause an obvious risk of P leaching. In conclusion, the threshold range of soil Olsen-P is from 12.5 to 30.6 mg P kg−1 to optimize crop yields and meanwhile maintain relatively low risk of P leaching in Haplic Luvisol soil, northern China.

关键词: critical phosphorus value , crop yield , Olsen P , phosphorus leaching , soil phosphorus test , water quality

Abstract: Sufficient soil phosphorus (P) content is essential for achieving optimal crop yields, but accumulation of P in the soil due to excessive P applications can cause a risk of P loss and contribute to eutrophication of surface waters. Determination of a critical soil P value is fundamental for making appropriate P fertilization recommendations to ensure safety of both environment and crop production. In this study, agronomic and environmental critical P levels were determined by using linear-linear and linear-plateau models, and two segment linear model, for a maize (Zea mays L.)-winter wheat (Triticum aestivum L.) rotation system based on a 22-yr field experiment on a Haplic Luvisol soil in northern China. This study included six treatments: control (unfertilized), no P (NoP), application of mineral P fertilizer (MinP), MinP plus return of maize straw (MinP+StrP), MinP plus low rate of farmyard swine manure (MinP+L.Man) and MinP plus high rate of manure (MinP+ H.Man). Based on the two models, the mean agronomic critical levels of soil Olsen-P for optimal maize and wheat yields were 12.3 and 12.8 mg kg−1, respectively. The environmental critical P value as an indicator for P leaching was 30.6 mg Olsen-P kg−1, which was 2.4 times higher than the agronomic critical P value (on average 12.5 mg P kg−1). It was calculated that soil Olsen-P content would reach the environmental critical P value in 41 years in the MinP treatment, but in only 5–6 years in the two manure treatments. Application of manure could significantly raise soil Olsen-P content and cause an obvious risk of P leaching. In conclusion, the threshold range of soil Olsen-P is from 12.5 to 30.6 mg P kg−1 to optimize crop yields and meanwhile maintain relatively low risk of P leaching in Haplic Luvisol soil, northern China.

Key words: critical phosphorus value , crop yield , Olsen P , phosphorus leaching , soil phosphorus test , water quality