期刊
FIELD CROPS RESEARCH
卷 270, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.fcr.2021.108208
关键词
Intercropping pattern; Temporal niche differentiation; Relative sowing time; Nitrogen input; Mixed effects model; Random effects
类别
资金
- National Key Research and Development Program of China [2016YFD0300202]
- Liaoning Revitalization Talents Program [XLYC2007041, XLYC1807056]
- National Natural Science Foundation of China [41807388, 31461143025]
- State Administration of Foreign Experts Affairs of the People's Republic of China [P182006002]
- European Union's Horizon 2020 Programme for Research Innovation [727217]
Intercropping maize and peanut has been shown to be more land use efficient than sole crops, with an average yield advantage mainly due to maize.
Intercropping cereals and legumes can increase agricultural productivity and reduce inputs of nitrogen fertilizer but there is a need for further literature synthesis on the size of intercropping advantages and the factors affecting these advantages. Here we present a global meta-analysis of 36 studies, 66 experiments and 260 treatments addressing the land productivity of maize (Zea mays L.) and peanut (Arachis hypogaea L.) intercropping. Data were extracted from the literature and analyzed with mixed effects models to assess the land equivalent ratio (LER) and the factors affecting LER. The worldwide average LER of maize/peanut intercropping was 1.31 +/- 0.03. The LER did not vary with continent, intercrop planting pattern and temporal niche differentiation, but sowing maize earlier than peanut (relative sowing time: RSTm<0) increased the partial LER of maize without significantly decreasing the partial LER of peanut. Increased N rate increased the partial LER of maize and decreased the partial LER of peanut but did not affect the total LER. This meta-analysis shows that maize/peanut intercropping is more land use efficient than the sole crops, it attains on average a win-no win yield advantage and mainly due to the maize.
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