| Effect of green manure on soil fertility properties in summer fallow period in Weibei dryland |
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| DOI：10.7606/j.issn.1000-7601.2011.02.21 |
| Key Words: dryland,leguminous green manure soil fertility soil property |
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| Abstract: |
| An experiment was carried out in Weibei area to investigate the effecet of leguminous green manure plants(soybean，Huai bean and mungbean) on soil fertility and other properties in summer fallow period. The results showed that Huai bean and mungbean had greater biomass than soybean. Huai bean contributed the most nitrogen and potasium by incoporation into soil while soybean contributed the least. Mungbean contributed the most phosphorous to soil while soybean contributed the least. Huai bean had greater root nodules and significant higher nitrogen content than mungbean and soybean. Compared to keeping summer fallow，planting and incorporating green manure plants into soil improved the content of soil organic matter, total N and available K. No remarkable differences of CEC was found between qreen ma-nure treatments and summer fallw after 4 weeks of incoporation. However, the trend was showed that green manures in-creased soil pH and decreased soil bulk density . There was no differences of soil pH among treatments after winter wheat harvest. Green manure plants consumed much soil water during growth period. After wheat harvest，soil water storage in 0~200 cm layer with green manure treatments was still lower than that with summer fallow treatment. No significant differences of soil properties were found among three green manure treatments. Planting and incorporating leguminous green manure plants into soil in summer fallow period is an effective way to improve soil fertility in dryland. |
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