| Effects of straw mulching and root interaction on intercropped maize physiological characteristics and yield |
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| DOI：10.7606/j.issn.1000-7601.2013.04.013 |
| Key Words: straw mulching maize/soybean intercropping root interaction chlorophyll photosynthetic characteristics yield |
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| Abstract: |
| A pot experiment was conducted to study the effect of different straw mulching levels and root interaction in maize/soybean intercropping system on maize. The results showed that straw mulching and root interaction increased the green leaf area per maize plant at maturity stage and the chlorop
hyll content of different growth stages, and the effect of root interaction was enhanced with the increase of straw mulching level. The plant water content and the root bleeding sap of maize at maturity stage were significantly affected by mulching, but not affected (P>0.05) by root interaction. Mulching and root interaction increased the photosynthetic rate, stomatal conductance, transpiration rate of maize, and reduced the intercellular CO2 concentration. With the sam
e root separation, the differences between the treatments T1 and T0 were significant. Mulching and root interaction improved maize yield components, and increased biological and economic yields per plant at maturity stage. Correlation analysis revealed that the green leaf area per maize plant, the chlorophyll content, the root bleeding sap rate, and the photosynthetic rate were all linearly positi
ve correlated with maize yield. In conclusion, the mulching and root interaction improved maize physiological characteristics and increased yield. The beneficial effect of root interaction was enhanced with the increase of the straw mulching level. |
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