[1]QIN Jia-ke,YIN Xing-Hua,LÜ,et al.A Study of Seasonal Changes in Soil Nutrients of Ecological Restoration Orchards in Karst[J].Research of Soil and Water Conservation,2010,17(06):101-105.
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A Study of Seasonal Changes in Soil Nutrients of Ecological Restoration Orchards in Karst
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
17
Number of periods:
2010 06
Page number:
101-105
Column:
Public date:
2010-12-20
- Title:
- A Study of Seasonal Changes in Soil Nutrients of Ecological Restoration Orchards in Karst
- CLC:
- S158.3;S153.6
- DOI:
- -
- Abstract:
- For sampling plots of plum, Chinese wampee and dagon orchards in the demonstration areas of Karst ecological restoration, soil nitrogen, phosphorus, potassium and their relationships with these plots were analyzed. Results showed that there were seasonal variations in the contents of soil nitrogen, phosphorus, potassium in orchards, depending on the difference in the nutrient uptakes during the growth, and that those nutrients exhibit obviously vertical changes in space, being decreased with increasing soil depth. The significant correlationship could be found between the contents of total nitrogen and hydrolyzed nitrogen, as also is the case with total phosphorous and available phosphorus. However, total K and available K are not related. In September, orchard demonstration areas have rich soil nitrogen content, relatively balanced phosphorus content, but are very short of potassium. In the Karst, the projects of ecological restoration are constrained by environmental characteristics of Karst rocky desertification area including thin soil layer, poor water-holding capacity, nutrient deficiencies and seasonal fluctuations. It is suggested that soil status must be surveyed during the ecological restoration in the Karst, associated with different soil improvement according to the standing types and that suitable plant species should be chosen, in a progressive way, followed by those principles of ecological restoration.
- References:
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