文章基本信息

标题：How Do Intensification Practices Affect Weed Management and Yield in Quinoa (iChenopodium quinoa/i Willd) Crop?
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作者：Ali reza Safahani Langeroodi ; Roberto Mancinelli ; Emanuele Radicetti 等
期刊名称：Sustainability
印刷版ISSN：2071-1050
出版年度：2020
卷号：12
期号：15
页码：6103
DOI：10.3390/su12156103
语种：English
出版社：MDPI, Open Access Journal
摘要：Quinoa cultivation is well-adapted to sustainable cropping systems, even if seed yield could be severely limited due to several constraints, such as weeds. Field trials were performed in Gorgan (Iran) to quantify the effects of agro-ecological service crops (rye, CCsubr/sub; winter vetch, CCsubw/sub; and no cover, CCsub0/sub), tillage regimes (conventional tillage, CT; and no-tillage, ZT), and herbicide rates (100% rate, Hsup100/sup; 75% rate, Hsup75/sup; and without herbicide, Hsup0/sup). Weed characteristics and quinoa yield were measured. Quinoa seed yield was the highest in CCsubw/sub-ZT-Hsup100/sup. Seed yield in Hsup100/sup and Hsup75/sup were higher compared with Hsup0/sup (2.30 vs. 1.58 t hasup−1/sup, respectively). Under conventional tillage, 46% of weed seeds were observed in the 0–10 cm soil layer and 54% in 10–20 cm soil layers, respectively, while, under no-tillage, about 63% of weed seeds were located up to 10 cm of soil. iAmaranthus retroflexus/i L. was the most abundant species. The total weed density was the lowest in CCsubr/sub-ZT-Hsup100/sup and tended to be higher in CCsub0/sub (30.9 plant msup−2/sup) and under CT (29.0 plant msup−2/sup). These findings indicate that cover crops have potential for managing weeds in quinoa; however, their inclusion should be supported by chemical means to maintain high seed.