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Position: Home > Articles > Soil Phosphorus Fractions Change in Winter in a Corn-Soybean Rotation with Tillage and Phosphorus Fertilization Pedosphere 2015,25 (1)

Soil Phosphorus Fractions Change in Winter in a Corn-Soybean Rotation with Tillage and Phosphorus Fertilization

作  者：
Yichao Shi;Noura Ziadi;Aimé J. Messiga;Roger Lalande;Zhengyi H
单  位：
College of Resources and Environment, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049 (China); Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada (AAFC), 2560 Hochelaga Blvd., Quebec, QC G1V 2J3 (Canada);Environmental and Resource Studies Program, Trent University, 1600 West Bank Drive, Peterborough, ON K9J 7B8 (Canada);Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada (AAFC), 2560 Hochelaga Blvd., Quebec, QC G1V 2J3 (Canada);College of Resources and Environment, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049 (China
关键词：
winter;tillage;2001;soil p fractions;2002;the tw
摘  要：
Determining how agricultural management practices affect soil phosphorus (P) over the winter may further our understanding of the soil P cycle under specific environmental conditions in eastern Canada. This study assessed changes over winter for soil P fractions and other selected chemical properties as affected by tillage and P fertilization. In 1992, a long-term corn (Zea mays L.) and soybean (Glycine max L.) rotational experiment was established in the province of Quebec, Canada. Soil samples (0-15 cm) were collected in fall 2001 and 2007 after a soybean harvest, and in the following spring 2002 and 2008 before corn seeding, in main plots under moldboard plow and no-till managements and selected subplots fertilized with 0, 17.5, or 35 kg P ha(-1) and 160 kg N ha(-1). Soil samples were analyzed for P fractions and other chemical properties to assess changes over winter for 2001-2002 and 2007-2008. Changes over winter of all soil P fractions were significant for the two periods, indicating the occurrence of soil P transformation and movement over winter. The Mehlich-3-extractable Fe, Al, Ca, and Mg decreased during the two studied periods. Tillage had no significant effect on all soil P fractions. The resin-extractable P in 2001-2002 and NaHCO3-extractable inorganic P and NaOH-extractable organic P during the two winters were significantly increased under P fertilization. This study demonstrated that P in cultivated soils changed during winter as a result of changes in labile P fractions possibly due to the solubilization of residual fertilizer P combined with environmental factors.

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