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Weed harrowing and inter-row hoeing in organic grown quinoa (Chenopodium quinoa Willd.)

Jacobsen, Sven-Erik; Christiansen, J.L. and Rasmussen, Jesper (2010) Weed harrowing and inter-row hoeing in organic grown quinoa (Chenopodium quinoa Willd.). Outlook on Agriculture, 39 (3), pp. 323-327.

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Weeds, with their negative influence on both yield and quality, constitute a major problem in the organic production of quinoa, a potential new seed crop for protein feed and human consumption in Europe. To attain effective weed control, mechanical weeding strategies, such as weed harrowing and inter-row hoeing, were studied. Weed harrowing operates over the entire plot with flexible tines, affecting both crop and weeds, whereas inter-row hoeing is performed between the rows, aiming only at the weeds. The study showed that both hoeing and harrowing reduced the quinoa density in one out of two years, whereas there was no effect on quinoa density in the other year. Yield was increased by both methods, but hoeing increased yield more than harrowing due to better weed control. Regression analysis showed that crop yield was related to weed dry matter and showed no indications of higher crop damage associated with weed harrowing. Protein content was low when weeds were not treated, and increased ignificantly when weeds were controlled. As a conclusion, inter-row hoeing was more efficient than weed harrowing with respect to weed control; however, weed harrowing should be optimized in future trials in narrow row spacing systems, and the results.

EPrint Type:Journal paper
Subjects: Crop husbandry
Crop husbandry > Weed management
Research affiliation: Denmark > KU - University of Copenhagen > KU-LIFE - Faculty of Life Sciences
Deposited By: Rasmussen, Associate professor Jesper
ID Code:18194
Deposited On:12 Jan 2011 08:04
Last Modified:27 Apr 2013 07:41
Document Language:English
Refereed:Peer-reviewed and accepted

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