Academic Journal
Is the Lack of Response of Maize to Fertilization in Soils with Low Bray1-P Related to Labile Organic Phosphorus?
| العنوان: | Is the Lack of Response of Maize to Fertilization in Soils with Low Bray1-P Related to Labile Organic Phosphorus? |
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| المؤلفون: | Appelhans, Stefania Carolina, Barbagelata, Pedro Aníbal, Melchiori, Ricardo J M, Gutiérrez Boem, Flavio Hernán, Caviglia, Octavio Pedro |
| بيانات النشر: | Sociedad Chilena de la Ciencia del Suelo |
| المجموعة: | CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
| مصطلحات موضوعية: | FERTILIZER RECOMMENDATION, LABILE P, RELATIVE YIELD, https://purl.org/becyt/ford/4.1, https://purl.org/becyt/ford/4 |
| الوصف: | The usual soil test phosphorus (P) neglects the P supply from labile organic P (Po) fractions, which could explain the nonresponse of maize (Zea mays L.) in sites with soil P testing below the critical level. We aim to determine Po and inorganic P (Pi) in NaHCO3 extracts and in the coarse soil fraction (hereinafter, CF) from responsive and nonresponsive sites to P fertilization in maize. We then compare the classification errors of the Cate and Nelson method by comparing the relationship between maize relative yield and the soil Bray1-P concentration vs. the new proposed indices. The study included responsive and nonresponsive sites to P fertilization carried out across the Pampas Region in the center-east of Argentina. Treatments included four P fertilization rates: 0, 12, 24, and 36 kg P ha−1. The experiments were laid out in a randomized complete block design with three replicates. We determined Bray1-P, Pi, and Po in NaHCO3 extracts and in the coarse soil fraction. Sites non-responsive to P fertilization and with Bray1-P concentrations below the critical level showed 70% more Po in the coarse soil fraction (Po-CF) than sites with high crop response and similar Bray1-P level. However, Po-Bic alone did not improve the relationship with maize relative yield. Po-CF and Bray1-P included in a soil integrative P index improved the prediction of crop response to P fertilization and reduced classification errors, which suggests that Po-CF is a source of available P for the crops. The novelty reported in this study was to demonstrate the organic P contribution to relative yield by including it into an integrative soil testing. We find that nonresponsive sites to P fertilization, with low Bray1-P, were correctly classified when including Po-CF in a new soil test P. Improvements in the P fertilization diagnostic prescription tool contribute to an increase in economic profit and reduce environmental impact. ; Fil: Appelhans, Stefania Carolina. Universidad Nacional de Entre Ríos. Facultad de Ciencias Agropecuarias. ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0718-9516 0718-9508 |
| Relation: | info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s42729-020-00387-8; http://hdl.handle.net/11336/153200; Appelhans, Stefania Carolina; Barbagelata, Pedro Aníbal; Melchiori, Ricardo J M; Gutiérrez Boem, Flavio Hernán; Caviglia, Octavio Pedro; Is the Lack of Response of Maize to Fertilization in Soils with Low Bray1-P Related to Labile Organic Phosphorus?; Sociedad Chilena de la Ciencia del Suelo; Journal of Soil Science and Plant Nutrition; 21; 1; 1-2021; 612-621; CONICET Digital; CONICET |
| الاتاحة: | http://hdl.handle.net/11336/153200 |
| Rights: | info:eu-repo/semantics/restrictedAccess ; https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
| رقم الانضمام: | edsbas.D4457865 |
| قاعدة البيانات: | BASE |
| تدمد: | 07189516 07189508 |
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