[1]WANG Yun,ZHAO Pengxiang.Effect of Land Use Types on Stability of Soil Aggregates, Soil Organic Carbon Fractions and Soil Respiration in Northern China[J].Research of Soil and Water Conservation,2020,27(01):59-65.
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Effect of Land Use Types on Stability of Soil Aggregates, Soil Organic Carbon Fractions and Soil Respiration in Northern China
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 01
Page number:
59-65
Column:
Public date:
2020-02-20
- Title:
- Effect of Land Use Types on Stability of Soil Aggregates, Soil Organic Carbon Fractions and Soil Respiration in Northern China
- Keywords:
- northern China; land use type; soil aggregates; soil respiration
- CLC:
- -
- DOI:
- -
- Abstract:
- Soil aggregates and aggregates have the important effect on soil fertility, soil quality and the sustainable utilization of soil. In this paper, in order to study the effect of land use types on stability of soil aggregates and soil respiration in Northern China, we took soil samples from five land use types which are secondary forest, artificial forest, shrubland, farmland and orchard, then we got the proportion of large macroaggregates(>2 mm), small macroaggregates(0.25～2 mm), microaggregates(53 μm～0.25 mm)and silt+clay(<53 μm)by wet sieving method and measured soil respiration. The results showed that soil respiration increased at first and then decreased over the months, and got the peak in July, after July, soil respiration decreased sharply, soil respiration decreased in the order: secondary forest>artificial forest>shrubland>farmland>orchard, and there was no significant difference in soil respiration between farmland and orchard (p>0.05); soil total organic carbon(TOC), particulate organic carbon(POC)and light component organic carbon(SLOC)were significantly affected by different land use types, which decreased in the order: secondary forest>artificial forest>shrubland>farmland>orchard. Reclamation of woodland will lead to fragmentation of macroaggregates and deterioration of soil structure, respectively. Changing the sloping farmland to abandoned land, led to the conversion of soil fraction from silt +clay to large macroaggregates and small macroaggregates, and could improve the soil structure. We found the MWD and GWD in farmland were significantly lower than those in woodland (p<0.05), while the MWD and GWD increased significantly (p<0.05)after changing the sloping farmland to abandoned land, which indicated that reclamation of woodland could lead to the decrease of stability of soil aggregates. In addition, correlation and regressive analysis showed that >0.25 mm WAS, MWD, GMD and soil respiration were significantly (p<0.01 )related to TOC, LFOC, and POC. More significant correlations between POC and >0.25 mm WAS, MWD and GMD with greater coefficients were founded, suggesting that soil particulate organic C plays a more important role in maintaining soil aggregate stability and soil respiration.
- References:
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Last Update:
2020-02-25