PellerinParentTremblayEtAl2006

Référence

Pellerin, A., Parent, L.-E., Tremblay, C., Fortin, J.A., Tremblay, G., Landry, C.P. and Khiari, L. (2006) Agri-environmental models using Mehlich-III soil phosphorus saturation index for corn in Quebec. Canadian Journal of Soil Science, 86(5):897-910. (Scopus )

Résumé

Soil phosphorus (P), which is potentially a risk for environmental contamination, is currently interpreted using soil P saturation in North America. Our objective was to assess the ratio of P to aluminum (Al) in the Mehlich-III (M-III) soil test to build P requirement models for corn and soybean. We analyzed 129 corn and 19 soybean P fertilizer trials. For corn, the (P/Al)M-III ratio improved soil fertility classification compared with PM-III alone. The critical PM-III value as determined by the Cate-Nelson procedure was found to be 31.5 mg PM-III kg -1, close to published values. The critical (P/Al)M-III ratios of 0.025 for > 300 g clay kg-1 soils and 0.040 for ≤ 300 g clay kg-1 soils differed significantly between the two soil groups. For (P/Al)M-III ratios above 0.214, there was no positive response to added P for all soils regardless of texture. Using published critical environmental (P/Al)M-III ratios of 0.076 for > 300 g clay kg-1 soils and 0.131 for ≤ 300 g clay kg-1 soils as benchmarks values, agri-environmental P requirement models were built using conditional expectations of 50 to 80% of computed optimum P values within a soil class. A validation study supported the low critical (P/Al)M-III ratios and the 50% conditional expectation model except for a high carbon soil which was outside the application range of the models. However, banded P decreased corn yield at four validation sites although the model predicted positive response to P. Soybean did not respond to P except at extremely low fertility levels ((P/Al)M-III ≤ 0.02) and behaved as a P-mining crop even in low-P soils. Corn-soybean rotations can reduce soil P to low (P/Al)M-III ratios with minimal agronomic risk.

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@ARTICLE { PellerinParentTremblayEtAl2006,
    AUTHOR = { Pellerin, A. and Parent, L.-E. and Tremblay, C. and Fortin, J.A. and Tremblay, G. and Landry, C.P. and Khiari, L. },
    TITLE = { Agri-environmental models using Mehlich-III soil phosphorus saturation index for corn in Quebec },
    JOURNAL = { Canadian Journal of Soil Science },
    YEAR = { 2006 },
    VOLUME = { 86 },
    NUMBER = { 5 },
    PAGES = { 897-910 },
    NOTE = { cited By 7 },
    ABSTRACT = { Soil phosphorus (P), which is potentially a risk for environmental contamination, is currently interpreted using soil P saturation in North America. Our objective was to assess the ratio of P to aluminum (Al) in the Mehlich-III (M-III) soil test to build P requirement models for corn and soybean. We analyzed 129 corn and 19 soybean P fertilizer trials. For corn, the (P/Al)M-III ratio improved soil fertility classification compared with PM-III alone. The critical PM-III value as determined by the Cate-Nelson procedure was found to be 31.5 mg PM-III kg -1, close to published values. The critical (P/Al)M-III ratios of 0.025 for > 300 g clay kg-1 soils and 0.040 for ≤ 300 g clay kg-1 soils differed significantly between the two soil groups. For (P/Al)M-III ratios above 0.214, there was no positive response to added P for all soils regardless of texture. Using published critical environmental (P/Al)M-III ratios of 0.076 for > 300 g clay kg-1 soils and 0.131 for ≤ 300 g clay kg-1 soils as benchmarks values, agri-environmental P requirement models were built using conditional expectations of 50 to 80% of computed optimum P values within a soil class. A validation study supported the low critical (P/Al)M-III ratios and the 50% conditional expectation model except for a high carbon soil which was outside the application range of the models. However, banded P decreased corn yield at four validation sites although the model predicted positive response to P. Soybean did not respond to P except at extremely low fertility levels ((P/Al)M-III ≤ 0.02) and behaved as a P-mining crop even in low-P soils. Corn-soybean rotations can reduce soil P to low (P/Al)M-III ratios with minimal agronomic risk. },
    AUTHOR_KEYWORDS = { Corn; Fertilizer P requirement model; Mehlich-III soil extraction method; Soil fertility classification; Soil phosphorus saturation; Soil texture; Soybean },
    DOCUMENT_TYPE = { Article },
    KEYWORDS = { agricultural modeling; aluminum; crop rotation; crop yield; environmental risk; extraction method; fertilizer application; index method; maize; model validation; phosphorus; saturation; soil fertility; soil test; soil texture; soybean; yield response, Canada; North America; Quebec [Canada], Glycine max; Zea mays },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-34248195376&partnerID=40&md5=e94aff322c00e1039430b3c8163dd702 },
}

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