[1]LI Xiaoyu,QI Mingming,LI Cong,et al.Effects of Flooding Occurrence Time and Duration on P. australis Growth and Soil Physical-Chemical Characteristics in Degraded Inland Marshes[J].Research of Soil and Water Conservation,2016,23(06):83-89.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 06
Page number:
83-89
Column:
Public date:
2016-12-28
- Title:
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Effects of Flooding Occurrence Time and Duration on P. australis Growth and Soil Physical-Chemical Characteristics in Degraded Inland Marshes
- Author(s):
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LI Xiaoyu1, QI Mingming2, LI Cong2, LI Xiujun1, LIU Xingtu1, WANG Ying3, LIN Jixiang2
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1. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;
2. Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field, Ministry of Education, Harbin 150040, China;
3. Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, China
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- Keywords:
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flooding; occurrence and duration; degraded P. australis; saline-alkaline soils
- CLC:
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Q142.8,S153
- DOI:
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- Abstract:
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Pot experiments were conducted to compare effects of flooding occurrence time and duration on Phragmites australis growth and soil physical-chemical characteristics in degraded inland marshes. The results showed that both flooding occurrence and duration time affected the growth of P. australis and saline-alkaline soil characteristics. With the increase of flooding duration, height of P. australis increased with the highest value in FD5. The above and under ground biomass increased first and then decreased with the highest value in FD3 (2 months flooding). Although Na+ and K+ contents did not show a regular change, they was the lowest in FD3. The characteristic parameters (pH value, EC, Na+, Ca2+, HCO3- and CO2-3content) decreased first and then increased with the lowest value in FD3 too. With delay of flooding occurrence time, there was no change on height and aboveground biomass of P. australis, but the tendency of underground biomass increased first and then decreased. Na+ had opposite tendency of underground biomass. The K+ content and the main characteristics of soil showed lower value in FO1 and FO2 treatments than FO3 and FO4 treatments. Meanwhile, flooding occurrence and duration time had no significant effects on organic matter, K+, Mg2+, Cl-, SO42- contents. Therefore, June and July was the key growth period with enough water. Supply water at this stage was quite important for restoring P. australis growth, and also improved the quality of saline-alkaline soil.