<div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div style="font-family:tahoma,sans-serif"><div><div><div><br><table cellspacing="0" cellpadding="0" width="100%" bgcolor="#474444" style="font-family:Arial,Helvetica,sans-serif"><tbody><tr><td style="font-size:0px;height:33px;line-height:0"></td></tr><tr><td valign="top"><table cellspacing="0" cellpadding="0" width="600" align="center" border="0" style="width:600px;margin:0px auto"><tbody><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:0px;text-align:left;background-color:rgb(254,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="44" style="height:44px"><th style="border-width:medium;border-style:none;border-color:initial;width:477px;vertical-align:middle;font-weight:normal;padding:10px 0px 0px 10px;text-align:left;background-color:rgb(66,176,91)"><p align="left" style="margin-bottom:1em;font-size:14px;font-family:tahoma,geneva,sans-serif;color:rgb(253,251,251);margin-top:0px;line-height:18px;background-color:transparent"><strong> <span>Seminario</span> IFEVA</strong></p></th><th style="border-width:medium;border-style:none;border-color:initial;width:103px;vertical-align:middle;font-weight:normal;padding:0px 5px;text-align:left;background-color:transparent"><div style="padding:10px;text-align:right"><table cellspacing="0" cellpadding="0" border="0" style="display:inline-block"><tbody><tr><td style="padding-right:5px"><a href="https://twitter.com/ifevaok?ref_src=twsrc%5Etfw%7Ctwcamp%5Eembeddedtimeline%7Ctwterm%5Eprofile%3Aifevaok&ref_url=http%3A%2F%2Fwww.ifeva.edu.ar%2Findex.tw.html" rel="noreferrer noreferrer" target="_blank"><img title="Twitter" alt="Twitter" src="https://mailchef.s3.amazonaws.com/uploads/mailstyler/images/478A2A14-0536-35C1-A7E4-6A014235947D_Image_1_9f1117f4-4654-4d62-878f-885c62b8fa59.png" width="24" 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style="border-width:medium;border-style:none;border-color:initial;width:580px;font-weight:normal;padding:0px 20px 0px 0px;text-align:left;background-color:rgb(254,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:580px"><tbody><tr height="92" style="height:92px"><th style="border-width:medium;border-style:none;border-color:initial;width:580px;vertical-align:middle;font-weight:normal;padding:0px;text-align:left;background-color:transparent"><table cellspacing="0" cellpadding="0" align="center" border="0" style="margin:0px auto"><tbody><tr><td align="center" style="padding:0px"><table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td style="border-width:medium;border-style:none;border-color:initial;background-color:transparent"><img alt="" src="https://mailchef.s3.amazonaws.com/uploads/mailstyler/images/152EFEE1-9961-67DB-42C9-BDFED3ECD20D_Image_4_2f0431fb-1968-435e-bed4-e7fa8fc21754.png" width="570" hspace="0" vspace="0" style="border-width:medium;border-style:none;border-color:initial;display:block"></td></tr></tbody></table></td></tr></tbody></table></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:0px;text-align:left;background-color:rgb(254,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="76" style="height:76px"><th style="border-width:medium;border-style:none;border-color:initial;width:326px;vertical-align:middle;font-weight:normal;padding:10px 10px 0px 20px;text-align:left;background-color:rgb(243,54,62)"><p align="left" style="margin-bottom:1em;font-size:14px;font-family:tahoma,geneva,sans-serif;color:rgb(253,251,251);margin-top:0px;line-height:18px;background-color:transparent"><strong>VIERNES<br>24 de NOVIEMBRE 2023<br>12.00 hs</strong></p></th><th style="border-width:medium;border-style:none;border-color:initial;width:244px;vertical-align:middle;font-weight:normal;padding:10px 0px 0px;text-align:left;background-color:rgb(108,108,108)"><p align="center" style="margin-bottom:1em;font-size:14px;font-family:tahoma,geneva,sans-serif;color:rgb(56,56,56);text-align:center;margin-top:0px;line-height:18px;background-color:transparent"><a title="" href="https://www.youtube.com/channel/UCCC_QmqL9yuKBnZ6p4mnxBw" rel="noreferrer noreferrer" style="color:rgb(253,251,251);text-decoration-line:none" target="_blank">Presencial: SUM <strong>IFEVA</strong></a></p></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:0px;text-align:left;background-color:rgb(254,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="121" style="height:121px"><th style="border-width:medium;border-style:none;border-color:initial;width:600px;vertical-align:middle;font-weight:normal;padding:0px;text-align:left;background-color:transparent"><table cellspacing="0" cellpadding="0" align="center" border="0" style="margin:0px auto"><tbody><tr><td align="center" style="padding:0px"><table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td style="border-width:medium;border-style:none;border-color:initial;background-color:transparent"><img alt="" src="https://mailchef.s3.amazonaws.com/uploads/mailstyler/images/A1D4E880-2191-4DD7-2282-E4EBD8D61287_Image_5_91564d99-8f65-4b8d-9d26-1320ac7ed277.jpg" width="600" hspace="0" vspace="0" style="border-width:medium;border-style:none;border-color:initial;display:block"></td></tr></tbody></table></td></tr></tbody></table></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:10px 0px 5px;text-align:left;background-color:rgb(253,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="126" style="height:126px"><th style="border-width:medium;border-style:none;border-color:initial;width:54px;vertical-align:top;padding:10px 5px 5px;text-align:left;background-color:transparent"><span class="gmail_default" style="font-family:tahoma,sans-serif;font-weight:normal"></span><table cellspacing="0" cellpadding="0" align="center" border="0" style="margin:0px auto"><tbody><tr><td align="center" style="padding:0px"><table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td style="border-width:medium;border-style:none;border-color:initial;background-color:transparent"><img alt="" src="https://mailchef.s3.amazonaws.com/uploads/mailstyler/images/5A4A5834-3F9A-6A31-826B-CB9282750DB7_Image_6_f652f2ce-f80b-4f92-bd91-eb57b875ac83.png" width="18" hspace="0" vspace="0" style="border-width:medium;border-style:none;border-color:initial;display:block"></td></tr></tbody></table></td></tr></tbody></table></th><th style="border-width:medium;border-style:none;border-color:initial;width:526px;vertical-align:top;padding:5px;text-align:left;background-color:transparent"><div style="background-color:rgb(255,255,255)"><span style="font-family:Calibri,"sans-serif""><font size="6">Mitigating crop yield losses through weed diversity.</font></span><br></div><p align="left" style="margin-bottom:1em;font-family:tahoma,geneva,sans-serif;color:rgb(0,0,0);margin-top:0px;line-height:30px;background-color:transparent"></p><p style="margin-bottom:0.21cm;line-height:19.2px;font-family:Arial,serif;direction:ltr"></p></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:5px 0px;text-align:left;background-color:rgb(254,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="564" style="height:564px"><th style="border-width:medium;border-style:none;border-color:initial;width:570px;vertical-align:top;padding:10px 15px;text-align:left;background-color:transparent"><p align="left" style="margin-bottom:1em;color:rgb(56,56,56);margin-top:0px;line-height:20px;background-color:transparent"><font size="4" face="arial, sans-serif"><span style="color:rgb(66,176,91)">Autor:</span><span style="font-weight:normal"> </span><span style="background-color:transparent;color:rgb(34,34,34)"><i>Paolo Barberi</i></span></font></p><p align="left" style="margin-bottom:1em;margin-top:0px;line-height:20px;background-color:transparent"><font face="arial, sans-serif"><font size="4" style="color:rgb(56,56,56);background-color:transparent;font-weight:normal"><strong><span style="color:rgb(66,176,91)">Filiación: </span></strong></font><font size="4" color="#000000"><span style="background-color:rgb(248,248,248);font-variant-ligatures:common-ligatures;font-weight:500">Centro di Ricerca di Scienze delle Piante</span><span style="background-color:rgb(248,248,248);font-variant-ligatures:common-ligatures;font-weight:500">, </span><span style="background-color:rgb(255,255,255);font-weight:400">Sa</span><span style="background-color:rgb(255,255,255);font-weight:400">nt'Anna Scuola Universitaria Superiore, Pisa, Italia </span></font></font></p><p align="left" style="margin-bottom:1em;color:rgb(56,56,56);margin-top:0px;line-height:20px;background-color:transparent"><font face="arial, sans-serif"><strong style="background-color:transparent;color:rgb(34,34,34)"><span style="color:rgb(66,176,91)"><font size="4">Resumen: </font></span></strong><font size="4" style="background-color:transparent;font-weight:normal"><span style="background-color:transparent;color:rgb(34,34,34)">Reconciling crop productivity with biodiversity conservation is one of the main challenges of agriculture worldwide. The importance of weed diversity in mitigating yield losses has been identified as one of the top five research priorities in weed science. In a PhD project run in collaboration between SSSA (Italy) and INRAE (France), we have tested the hypotheses that (i) not all weed communities generate yield losses and (ii) that more diversified weed communities can mitigate yield losses. The study was based on three years of observations of weed densities, weed biomass and crop biomass at four critical growth stages of winter cereals across 54 in-field zones (36 unweeded and 18 weeded). Out of the six weed communities types identified, only four generated significant yield losses in unweeded zones, ranging from 19% to 56%. The number of winter cereals ears per plant and the number of grains per ear were systematically affected, but only one weed community was capable of reducing 1,000-kernel weight. Weed biomass decreased by 83% over a gradient of weed community evenness, whereas crop productivity increased by 23%. Diversified weed communities limited the negative effect of competitive and dominant species on crop productivity while potentially promoting ecosystem services provided by subordinate species. Further data indicating the same trend will be shown, and the implications of these findings for the promotion of low-pesticide, agroecological cropping and farming systems will be discussed</span><span style="background-color:transparent;color:rgb(34,34,34)">.</span></font><br></font></p><br><p align="left" style="margin-bottom:1em;color:rgb(56,56,56);margin-top:0px;line-height:20px;background-color:transparent"><font face="arial, sans-serif"><strong style="background-color:transparent;font-size:large"><span style="color:rgb(66,176,91)">Palabras claves:</span></strong><font size="4" style="background-color:transparent;font-weight:normal"><span style="background-color:transparent"> Biodiversity conservation; </span></font></font><font size="4"><span style="background-color:transparent;font-weight:normal;color:rgb(34,34,34)"><font face="arial, sans-serif">Crop yield losses; weed communities; weed diversity.</font></span><br></font></p></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:5px 0px;text-align:left;background-color:rgb(253,251,251)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="163" style="height:163px"><th style="border-width:medium;border-style:none;border-color:initial;width:140px;vertical-align:top;padding:5px;text-align:left;background-color:transparent"><img src="cid:ii_lox32j8r22" alt="image (1).png" width="197" height="198" style="outline:0px;margin-right:0px"><br></th><th style="border-width:medium;border-style:none;border-color:initial;width:440px;vertical-align:top;padding:5px;text-align:left"><span style="background-color:rgb(254,251,251)"><i>Paolo Barberi </i></span><span style="font-weight:normal">i<font face="arial, sans-serif">s MSc in Agricultural Science and PhD in Environmentally-Sound Innovative Crop Management Practices, University of Pisa, Italy. Professor in Agronomy and Field Crops. Coordinator of the Group of Agroecology, Area Agroecosystem Services, Institute of Life Sciences.</font></span><font face="arial, sans-serif" style="font-weight:normal"> <span lang="IT" style="background-color:rgb(255,255,255)">Coordinator, PhD Programme in Agrobiodiversity. Sant’Anna Scuola Universitaria Superiore Pisa. </span><span lang="EN-US" style="background-color:rgb(255,255,255)">Research topics: Agroecology, Cropping systems, Functional agrobiodiversity, Organic and low external input agriculture, Provision of agroecosystem services, Weed ecology and management</span><span style="background-color:rgb(254,251,251)"><i> </i></span></font><br><br><p style="margin-bottom:0.21cm;line-height:19.5px;direction:ltr"></p><p style="margin-bottom:0.21cm;line-height:19.5px;direction:ltr"></p></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:0px;text-align:left;background-color:rgb(229,229,229)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="93" style="height:93px"><th style="border-width:medium;border-style:none;border-color:initial;width:570px;vertical-align:middle;font-weight:normal;padding:10px 10px 0px 20px;text-align:left;background-color:transparent"> <img src="cid:ii_lox2yd4415" alt="cf6d4fa3-c656-48ee-9f5a-6c3dcb5e4ab2.png" width="472" height="58"><br><p align="left" style="margin-bottom:1em;font-size:14px;font-family:verdana,arial,helvetica,sans-serif;color:rgb(56,56,56);margin-top:0px;line-height:18px;background-color:transparent"><span style="background-color:transparent;line-height:18px"><strong>Certificados:</strong> </span><span style="background-color:transparent;font-family:Arial,Helvetica,sans-serif;font-size:small;color:rgb(34,34,34)">los alumnos que necesiten certificar su asistencia, deberán enviar </span><span style="background-color:transparent;font-size:small">su nombre y DNI</span><span class="gmail_default" style="background-color:transparent;font-size:small;font-family:tahoma,sans-serif"> </span><span class="gmail_default" style="background-color:transparent;font-size:small;font-weight:700;font-family:tahoma,sans-serif"><span style="font-weight:normal">al moderador (</span><a href="mailto:mtexeira@agro.uba.ar" rel="noreferrer noreferrer" style="font-weight:normal" target="_blank">mtexeira@agro.uba.ar</a><span style="font-weight:normal">) </span>durante el transcurso del <span>seminario</span> o en la hora posterior a la finalización del mismo</span><span style="background-color:transparent;font-size:small">. </span><br></p></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:0px;text-align:left;background-color:rgb(66,176,91)"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="62" style="height:62px"><th style="border-width:medium;border-style:none;border-color:initial;width:560px;vertical-align:top;font-weight:normal;padding:25px 20px 10px;text-align:left;background-color:transparent"><p align="center" style="margin-bottom:1em;font-size:12px;font-family:tahoma,geneva,sans-serif;color:rgb(9,9,9);text-align:center;margin-top:0px;line-height:15px;background-color:transparent"><strong><span style="color:rgb(255,255,255)">Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura</span></strong></p></th></tr></tbody></table></th></tr><tr><th style="border-width:medium;border-style:none;border-color:initial;width:600px;font-weight:normal;padding:1px 0px;text-align:left;background-color:transparent"><table cellspacing="0" cellpadding="0" align="left" style="width:600px"><tbody><tr height="66" style="height:66px"><th style="border-width:medium;border-style:none;border-color:initial;width:590px;vertical-align:middle;font-weight:normal;padding:5px;text-align:left;background-color:transparent"><p align="center" style="margin-bottom:1em;font-size:12px;font-family:tahoma,geneva,sans-serif;color:rgb(253,251,251);text-align:center;margin-top:0px;line-height:15px;background-color:transparent"><br>IFEVA - Facultad de Agronomía - Universidad de Buenos Aires<br> Av. San Martín 4453 - C1417DSE - Buenos Aires - Argentina</p></th></tr></tbody></table></th></tr></tbody></table></td></tr><tr><td style="font-size:0px;height:8px;line-height:0"> </td></tr></tbody></table></div></div></div></div><div>--<br></div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Marcos Texeira<br>Departamento de Métodos Cuantitativos y Sistemas de Información // <br>LART - IFEVA - CONICET<br>(011) 452870829</div><div>Facultad de Agronomía<br>Universidad de Buenos Aires</div><div><span>Av. San Martín 4453 (C1417DSE)<br></span></div></div></div></div>
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