Frontiers Publishing Partnerships Changes in Soil Phosphorus Pools in Long-Term Wheat-Based Rotations in Saskatchewan, Canada With and Without Phosphorus Fertilization
Por um escritor misterioso
Last updated 27 maio 2024
Phosphorus (P) is an essential nutrient for all organisms, and many crops require P fertilization for optimum yield. However, there are concerns about the P in agriculture, including the sustainability of phosphate sources for fertilizers and water quality problems from P loss in runoff from agricultural lands. Most crops do not use all of the P added each year as fertilizer, leaving residual soil P that could potentially be used by subsequent crops, minimizing the need for additional fertilization. However, more information is needed to understand soil residual P pools, and their availability to crops. In Swift Current, SK, Canada, a long-term study was initiated in 1967, with four wheat-based rotations [including continuous wheat (CW), fallow-wheat-wheat (FWW), fallow-wheat (FW) and lentil-wheat (WL), with P fertilization and with or without nitrogen (N) fertilization. In 1995, P fertilization ceased on subplots in the CW and FWW rotations, and in 2008 for the FW and WL rotations. This study examined changes in soil P pools (total P, organic P, and Olsen P) from 1995-2015 for CW and FWW rotations and from 2008-2016 for FW and WL rotations, plus crop yield and grain and straw N and P concentrations. Long-term P addition increased concentrations of soil total and Olsen P in FWW, CW and FW rotation, particularly in plots without N fertilization. However, calculated P depletions based on fertilizer addition and crop P removal were negative only for plots without N fertilization. Cessation of P fertilization reduced concentrations of soil total and Olsen P, especially in plots with N fertilization. Annual yields were affected more by N fertilization and precipitation than P fertilization. Grain and straw P concentrations were not significantly reduced with short-term P cessation in FW and WL rotation, but were reduced with longer-term P fertilizer cessation in FWW and CW rotations.
PDF) Changes in Soil Phosphorus Pools in Long-Term Wheat-Based Rotations in Saskatchewan, Canada With and Without Phosphorus Fertilization
Agronomy, Free Full-Text
Quantifying Uncertainties in Sequential Chemical Extraction of Soil Phosphorus Using XANES Spectroscopy
Model-Based Analysis of the Long-Term Effects of Fertilization Management on Cropland Soil Acidification
Options for Improved Phosphorus Cycling and Use in Agriculture at the Field and Regional Scales - Schneider - 2019 - Journal of Environmental Quality - Wiley Online Library
Model-Based Analysis of the Long-Term Effects of Fertilization Management on Cropland Soil Acidification
Long-term cover crops improved soil phosphorus availability in a rain-fed apple orchard - ScienceDirect
Assessment of phosphorus status in a calcareous soil receiving long‐term application of chemical fertilizer and different forms of swine manures - Kodaolu - Journal of Environmental Quality - Wiley Online Library
Frontiers Publishing Partnerships Changes in Soil Phosphorus Pools in Long -Term Wheat-Based Rotations in Saskatchewan, Canada With and Without Phosphorus Fertilization
Phosphorus fertility studies reveal best placement - Grainews
Phosphorus, not nitrogen, limits plants and microbial primary producers following glacial retreat
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