Wheat-legume temporary intercropping with legume devitalization in late winter can increase the N self-sufficiency of cropping systems and improve the N nutrition of wheat as a cash crop. However, this practice has been scarcely investigated. In this study, carried out in a Mediterranean environment with cold winters, we compared 14 treatments over 3 years with different weather patterns: (A) pure stands of common wheat (Triticum aestivum L.) grown at 0, 40, 80, 120, 160 kg N ha−1; (B) pure stands of faba bean (Vicia faba L. minor), pea (Pisum sativum L.), and squarrose clover (Trifolium squarrosum L.); (C) temporary intercrops of wheat and faba bean, pea, or clover; and (D) permanent intercrops of wheat and the same legumes. In the temporary intercrops, all legumes improved the wheat N availability compared with the unfertilized control. The “N effect” of legumes for wheat was consistent across years and proportional to the competitive ability of the legumes, i.e., faba bean > pea > clover. The higher the legume competitive ability, the higher was its N accumulation before devitalization, and the higher/earlier was the N supplied to wheat. Our findings demonstrate that the date of legume devitalization represents a key factor to be managed each year in order to maximize legume N supply while preventing excessive legume competition, which could undermine wheat growth and yield. Such a modulation was not possible in permanent intercrops, where legume competition depressed wheat grain yield. The N supplied with legume devitalization increased wheat grain N accumulation during grain filling. This is the first work comparing temporary and permanent intercrops of wheat with different legumes and over different seasons. Overall, temporary intercropping appears to be a feasible and efficient tool for the sustainable management of N nutrition in winter wheat.
Agronomy for Sustainable Development – Springer Journals
Published: May 30, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera