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| Effects of different vegetation restoration methods on contentsof mineral elements in slope soil of Longcha highway |
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| Abstract: |
| In order to determine the effects of different vegetation restoration methods on the soil，the contents
of mineral elements，pH value and organic matter in slope soil were determined after treated for one year. The
results showed that the nitrogen element content of samples with planting Verbena tenera，Photinia × fraseri and
Rhododendron simsii increased the most，8.6 times of that of new soil. The phosphorus content of sample treated
with coconut network protection plus spray sowing soil increased the most，which was 8.3 times of that of new soil，
while the phosphorus content of sample treated with Indigofera pseudotinctoria increased by 7.7 times. The potassium
content of sample treated with coconut network protection plus spray seeding increased the most，6.5 times of that
of new soil. The Magnesium content of sample with I. pseudotinctoria increased the most，4.6 times of that of new
soil. The pH values were less than 7 except the sample treated with Amorpha fruticosa. Compared to the new soil and
coal gangue，the contents of organic matters of all treatments greatly improved，but far less than those of natural
community. The organic matter content of sample treated with coconut network protection plus spray sowing increased
the most，11 times of that of new soil. The organic content of the sample with planting I. pseudotinctoria and sample
with glass were high. The less increase of organic matter content was found in the sample with Sedum lineare，4 times
of that of new soil. Those results show that the coconut network protection plus spray sowing technology is the most
suitable for the slope revegetation，because it could
increase the contents of mineral elements in the soil and
organic matter content in a relatively short time，which
is conducive to the growth of plants. |
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