| Effect of roots partitions on interspecific competition and nitrogen fixation in the pea-maize intercropping |
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| DOI：10.7606/j.issn.1000-7601.2016.06.27 |
| Key Words: intercropped maize and pea root partition interspecific competition nitrogen fixation |
| Author Name | Affiliation | | LI Juan | Institute of Soil and Fertilizer and Water-Saving Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | WANG Wen-li | Institute of Soil and Fertilizer and Water-Saving Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | ZHAO Xu | Institute of Soil and Fertilizer and Water-Saving Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | SUN Jian-hao | Institute of Soil and Fertilizer and Water-Saving Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Using a pot experiment, the interspecific competition and nitrogen fixation under maize intercropped with pea was investigated. Two N fertilizer levels (0, 0.15 g·kg-1 soil) and three root partition (no seperation, separated by plastic film and by nylon mesh) was included. The results showed that both maize biomass and its nutrient acquisition were higher in intercropping than those in monoculture. Compared to monoculture, for no N fertilizer, maize biomass in intercropping was increased by 28.5%, 32.8%, 48.7% respectively; At seedling stage, early podding stage and harvesting stage of pea, they are -8.6%, 8.1%, 63.2%, respectively, for 0.15 g·kg-1 soil. Maize biomass of three root partition showed no seperation＞separated by nylon mesh＞separated by plastic film＞monoculture. For no N fertilizer, at seedling stage of pea, pea biomass in intercropping was increased by 35.8% compared with monoculture. The increasing of pea biomass decreased with the development of maize, there was no difference in pea biomass at harvesting between intercropping and monoculture. Pea biomass under three root partition showed the rank: separated by plastic film >no seperation > separated by nylon mesh > monoculture. For 0.15 g·kg-1 soil, the yield of intercropped pea was decreased compared with monoculture pea. Pea biomass under three root partition at harvesting showed the rank: separated by nylon mesh＞separated by plastic film＞monoculture＞no separation. Compared with monoculture, the nodulation number of pea under no seperation, separated by nylon mesh and by plastic were increased 120%, 82.5%,22.5%, respectively. |
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