| Study on ecological environment influence of different age of hippophae in hilly and gully region on the Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2008.05.24 |
| Key Words: hippophae soil moisture soil nutrient pH value |
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| Abstract: |
| In order to discuss the effect of hippophae with different ages to the ecological environment in hilly and gully region on the Loess Platea, an experiment was made in a plot in Ansai station to study the soil moisture and nutrient change characteristics of the field with different ages of hippophae.The result indicated that the soil moisture content of hippophae forest land in the root system weak use level (0～20 cm) and normal use level (20～300 cm) showed adecline tendency along with aging of hippophae and increase of soil layer depth. The average exactable nitrogen accumulation quantity of 4～15 a-aged hippophae is 28.0 g/kg, while the 8 a-aged hippophae's exactable nitrogen, fast-acting P are 28.0 and 1.72 g/kg respectively; and the 12 a-aged hippophae's exactable nitrogen, fast-acting P are 29.2 and 1.18 g/kg respectively. Along with the increase of hippophae's age, the fast-acting P accumulation quantity assumes a drop tendency, but exactable nitrogen assumes an increase one, with the maximum value of accumulation quantity of 15 a hippophae being 30.2 g/kg. Tests in the region show that the soil assumes the alkalinity, the pH value changes between 8.0～8.6. which diaplays a trend of escalation along with the hippophae treeage growth. |
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