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| Effect of citrus intercropping with other crops onthe nutrient status of rhizospheric soils |
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| Abstract: |
| Effects of citrus/peanut, citrus/ginger intercropping, systems and peanut, citrus, ginger monocropping
systems on the nutrients status of rhizospheric soils were investigated comparatively in Xinhui reclaimed wetlands,
Guangdong province. Results showed that (1) The pH value of rhizospheric soil varied greatly in the five farming systems
after 7 months cultivation. The pHs of rhizospheric soils in citrus/peanut and citrus/ginger farming systems were
significantly lower than those under the peanut, citrus and ginger monocropping system. Especially, the pH of rhizospheric
soil of citrus/peanut farming system was the lowest among the five kinds of planting systems; (2)The contents of available
nitrogen in rhizospheric soil of citrus/peanut and citrus/ginger intercropping system were significantly higher than those of
peanut and ginger monocropping system. No significant difference was found between the citrus/peanut and citrus/ginger
intercropping systems. Also, the available nitrogen contents in the five farming systems all improved significantly after 7-
month plantation;(3) The available phosphorus content of rhizospheric soil in citrus monocropping was significantly higher
than that in citrus/peanut, citrus//ginger intercropping,
and peanut monocropping systems. Meanwhile, The
available phosphorus contents of rhizospheric soil in
citrus/peanut and citrus/ginger interplanting systems did
not show any significant differences from those in the
peanut and ginger monocropping systems. (4) After 7-
month planting, the available potassium content of
rhizospheric soil in citrus/ginger farming system was
significantly higher than that in the citrus monocropping systems; available potassium content in citrus/peanut intercropping was similar to that in citrus/ginger interplanting, and
was significantly improved in 7 months.(5) The organic matter contents of rhizospheric soils in the five farming systems
were very close and no obvious change with time in this study. It would be concluded that citrus/ginger and citrus/peanut
intercropping systems could improve some nutrients status of rhizospheric soils. So citrus/ginger and citrus/peanut
intercropping systems may be good examples for orchard land use in the study area. |
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