Interactions between Plants and Plant-Soil in Functionally Complex Mixtures including Grass Pea, Faba Bean and Niger, Intercropped with Oilseed Rape

Agronomy

Xavier Bousselin¹  Alice Baux¹  Juan Manuel Herrera¹  Muriel Valantin-Morison²  Joëlle Fustec³  Mathieu Lorin³  Marie Hédan³  Nathalie Cassagne³ 

[1] Agroscope, Plants and Plants Products, Route de Duillier 50, CH-1260 Nyon, Switzerland;UMR Agronomie, INRAE, AgroParisTech, Université Paris-Saclay, F-78850 Thiverval-Grignon, France;USC 1432 LEVA, Ecole Supérieure d’Agricultures, INRAE, SFR 4207 QUASAV, 55 rue Rabelais, F-49100 Angers, France;

关键词: intercropping;    oilseed rape;    service plants;    companion plant;    faba bean;    grass pea;   

DOI  :  10.3390/agronomy11081493

来源: DOAJ

【 摘 要 】

Winter oilseed rape (OSR) can be grown intercropped with frost-sensitive service plant mixtures. This practice may reduce weed pressure and contribute to providing N for OSR after service plant freezing. However, there is little knowledge of how plants interact together and with the soil in diverse annual crop mixtures. To assess these interactions, two contrasting legume service plants were selected: faba bean and grass pea, as well as a non-legume, the niger plant. OSR and the legumes were then grown in mesocosms alone or intercropped in mixtures of two to four species. The biomass, N contents, N₂ fixation, and soil substrate-induced respiration were measured. A single species mostly drove the total dry biomass and the amount of N accumulated by the cover, OSR and faba bean for dry weight and N contents, respectively. Grass pea was highly sensitive to competition with OSR, and its N₂ fixation was lower than that of faba bean. The addition of niger did not lead to additional N₂ fixation of legumes or total N accumulation and contributed to reducing OSR biomass. The specific composition of the plant mixture did not explain the soil microorganism activity.

【 授权许可】

Unknown