{"id":82736,"date":"2019-01-30T12:11:49","date_gmt":"2019-01-30T17:11:49","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/short-term-physiological-responses-black-walnut-juglans-nigra-plantation-thinning\/"},"modified":"2019-01-30T12:11:49","modified_gmt":"2019-01-30T17:11:49","slug":"short-term-physiological-responses-black-walnut-juglans-nigra-plantation-thinning","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/short-term-physiological-responses-black-walnut-juglans-nigra-plantation-thinning\/","title":{"rendered":"Short-term physiological responses of black walnut (Juglans nigra L.) to plantation thinning"},"content":{"rendered":"\n<p>Published in <strong>Forest Science&nbsp;55(3): 221-229<\/strong><\/p>\n<p>We studied physiological responses of mature black walnut (<em>Juglans nigra<\/em> L.) trees to determine the time necessary for photosynthetic adaptation to plantation thinning. Measurements were taken before treatment (July 25, 2007) and for the first 3 days after thinning (July 29, 30, and 31, 2007). Measurements did not continue in August because trees had developed leaf anthracnose and senescence was occurring, but measurements resumed on May 29, 2008 and July 29, 2008. Repeated measures of net photosynthetic rates (<em>A<\/em>) showed that thinned trees did not respond immediately to partial release, but nearly doubled in <em>A<\/em> compared with a 35% increase in control trees 1 year after thinning. Significant increases in light, leaf water status, relative humidity of the air, and nitrogen content per unit leaf area were also found in thinned trees 1 year after treatment. From these variables, light (<em>r<sup>2<\/sup><\/em> = 0.79) showed the strongest relationship with <em>A<\/em>. Results suggest that black walnut requires a full growing season before it responds to treatment when thinned late in the growing season. Thinning earlier, such as in June, may trigger a more rapid adaptation in <em>A<\/em> of thinned trees that was not detected in our study.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in Forest Science&nbsp;55(3): 221-229 We studied physiological responses of mature black walnut (Juglans nigra L.) trees to determine the time necessary for photosynthetic adaptation to plantation thinning. Measurements were taken before treatment (July 25, 2007) and for the first 3 days after thinning (July 29, 30, and 31, 2007). Measurements did not continue in [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1180,1181,1182],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[],"class_list":["post-82736","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-forestry-research","cptt_theme-forests","cptt_theme-silviculture","cptt_categ_publi-scientific-article"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Short-term physiological responses of black walnut (Juglans nigra L.) to plantation thinning - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Results suggest that black walnut requires a full growing season before it responds to treatment when thinned late in the growing season.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/short-term-physiological-responses-black-walnut-juglans-nigra-plantation-thinning\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Short-term physiological responses of black walnut (Juglans nigra L.) to plantation thinning - 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