IN INOCULANTS Nodulaid - 17th International Nitrogen Fixation ...
IN INOCULANTS Nodulaid - 17th International Nitrogen Fixation ...
IN INOCULANTS Nodulaid - 17th International Nitrogen Fixation ...
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17 th <strong>International</strong> Congress on <strong>Nitrogen</strong> <strong>Fixation</strong><br />
Fremantle, Western Australia<br />
27 November – 1 December 2011<br />
Session Details: Wednesday 30 November 2011<br />
Concurrent Session 15 – Quantification of N-<strong>Fixation</strong><br />
1600 – 1740<br />
Authors: Alejandro del Pozo 1 , Carlos Ovalle 2 & Soledad Espinoza 2<br />
1 Facultad de Ciencias Agrarias, Universidad de Talca, Talca, Chile.<br />
2 CRI-Quilamapu, <strong>IN</strong>IA, Chillán, Chile.<br />
Presentation Title: <strong>Nitrogen</strong> fixation of grain legumes in two contrasting mediterranean environments of<br />
Chile<br />
Presentation Time: 1640 – 1700<br />
Grain legumes are important components of Mediterranean farming systems due to their capacity to fix nitrogen<br />
and to improve soil fertility, as well as to reduce weeds in legume-cereal rotations. In this work we evaluate the<br />
nitrogen fixation capacity of four grain legumes, Pisum sativum, Lupinus angustifolius, L. luteus and L. albus, in<br />
rotation with wheat, by using the 15 N natural abundance technique. Field experiments were conducted in two<br />
contrasting Mediterranean environments and in two years (2008 and 2009). In the interior dryland (granitic<br />
Alfisol; 650 mm of annual rainfall), total dry matter production was higher in P. sativum (average 10.5 ton ha -1 )<br />
than in L. angustifolius and L. luteus (average 5.5 ton ha -1 ). The N derived from the atmosphere (%Ndfa) was<br />
significant (p