[1]LI Yin-ke,LIU Shi-zeng,LIU Hu-jun,et al.Study on Soil Characteristics of Desert-riverside Ecotone in Middle and Lower Reaches of Shiyang River[J].Research of Soil and Water Conservation,2012,19(06):29-35.
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Study on Soil Characteristics of Desert-riverside Ecotone in Middle and Lower Reaches of Shiyang River
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
19
Number of periods:
2012 06
Page number:
29-35
Column:
Public date:
2012-12-20
- Title:
- Study on Soil Characteristics of Desert-riverside Ecotone in Middle and Lower Reaches of Shiyang River
- Keywords:
- middle and lower reaches of Shiyang River; desert-riverside ecotone; soil physical and chemical properties
- CLC:
- S158.3
- DOI:
- -
- Abstract:
- Physical and chemical properties of soil in 0-200cm layer in the desert-riverside ecotone were examined at dryer section (DS), springs overflow section (SOS) in middle reaches of Shiyang river, and wet section above Hongyashan reservoir (WSA) and drying section in Hongyashan reservoir below (DSB) in lower reaches of Shiyang river. The results showed that the order of the soil water contents was WSA>SOS>DSB>DS. Precipitation in rainy season has little effect on WSA, whereas relatively big effect on the others, and its contribution to soil moisture mainly focused in 10-40cm soil layer; the bulk density of soil was high, and the value of soil surface was higher than that in sublayer. The soil pH value was 7.70～8.55, and the value in soil surface was lower than that in sublayer. Soil pH value decreased in turn from upper to lower reaches, the changes were related with organic matter content, salt composition and total salt content; the soil nutrient was insufficient with the low content of organic matter, total nitrogen and available phosphorus, and with high content of available potassium. Soil organic matter and total nitrogen were the highest at WSA, and available phosphorus was the highest at DS; soil salt content increased in turn from upper to lower reaches. The soil salinization has happened at WSA and DSB, the salinization types were chloride-sulfate and sulfate-chloride, respectively. The soil properties were of great variability because of hydraulic force and wind, the difference of soil properties between each river section was mostly insignificant.
- References:
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