[1]TIAN Mao-jie.Spatial Differentiation of Soil Properties in the Dry Valley along a River’s Length of the Hengduan Mountains[J].Research of Soil and Water Conservation,2011,18(03):19-23.
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Spatial Differentiation of Soil Properties in the Dry Valley along a River’s Length of the Hengduan Mountains
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
18
Number of periods:
2011 03
Page number:
19-23
Column:
Public date:
2011-06-20
- Title:
- Spatial Differentiation of Soil Properties in the Dry Valley along a River’s Length of the Hengduan Mountains
- Keywords:
- dry valley of Hengduan Mountains; spatial differentiation of soil fertility; Jinsha River; Panxi Region
- CLC:
- S158.3;S153.6+1
- DOI:
- -
- Abstract:
- Typical dry valley of Jinsha River is characterized by dry season and monsoon,which is very susceptible to soil degradation in the context of the fragile environment.In order to assess the impacts of environmental gradients on soil chemical fertility quality of dry valleys,soil chemical fertility status in dry valley of Heishui River,one branch of Jinsha River,have been monitored.The results showed that soil chemical properties were impacted significantly along altitudinal gradients.There was no difference in contents of soil organic matter of all elevations.Available nitrogen and available phosphorus along Masangping(upstream) altitudinal gradients were the highest from 1 100～1 200m asl;while along Pisha(midstream) altitudinal gradients they were the highest from 1 100～1 200m asl,and would decrease with elevation.Available nitrogen and available phosphorus along Hulukou(downstream) altitudinal gradients deteriorated greatest from about 700m asl.Soil exchangeable Ca,Mg and base along Masangping altitudinal gradients were the highest at 1 400m asl,and exchangeable K was the lowest in riverbank.Soil exchangeable cation and base decreased along Ningnan altitudinal gradients with elevation while increased above 2 000m asl.Soil exchangeable Ca,Mg,Na and base along Hulukou altitudinal gradients decreased with elevation while soil exchangeable K increased with elevation.Therefore,assessment indices of soil quality and countermeasures of degraded soil restoration should be adapted even in a dry valley because dominant factors reflecting changes in soil quality vary with different section from upstream to downstream.
- References:
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1900-01-01