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Characteristics of the Wetland Vegetations and Their Potential Capacity for Water Purification in Hetao Area

Author: LiuXinYao
Tutor: LiQingFeng
School: Inner Mongolia Agricultural University
Course: Ecology
Keywords: Wetlands Primary productivity Water purification The content of N, P
CLC: Q948
Type: Master's thesis
Year: 2011
Downloads: 51
Quote: 0
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Abstract

The Loop area farmland retire water N , P content exceeded the pollution caused by the Yellow River has become increasingly serious . By plant absorption and utilization of sewage treatment has become a social hot spot . In this study, based on survey Loop area of wetland plant resources , to explore the relationship between wetland vegetation productivity and diversity of water purification function . The results showed that : 1 , relative to the entire plant formations , the Loop species of wetland vegetation structure relatively monotonous . Were found in the investigation of the 49 species of plants ( except trees outside ) . Wetland plant families and species accounted for 39.62% , 24.22% , and 16.72% of the Loop area plant families and species . The composition of the vegetation is mainly reeds, false reed Calamagrostis arundinacea , which accounted for 81.57% of the total area of ??wetland area of ??Phragmites communis , fake reed of Calamagrostis epigejos community area accounted for 12.60% of the total area of ??wetland . Depends on grass , water , candles and other plant communities within the wetland , about 5.83% . 2 , reed and cattail wetland areas in the Loop , the more important of the two plants . Loop area dominant species Phragmites communis primary production capacity is high, dry matter yield up to 0.8 × 10 ~ 4kg/hm ~ 2. However, due to its low reproducibility , suitable multiple harvesting utilize . Spring incineration the vegetation removal stubble to promote the reeds growth and accumulation of nutrients , and its dry matter yields of up to 1.2 × 10 4kg/hm to 53.80% higher than the same period of not burning reeds dry matter yield significantly higher than incineration . 3 different vegetation mowing in different seasons and different ways that can be removed from the N and P content different . Such as reed up to 1.30% of N and 0.24% of P , false reed Calamagrostis Mao up to 0.53% of N and 0.15% P , up to 1.10% of N and 0.35% P cattail . Therefore, should reasonably arrange production according to the different production purposes . Annually through the rational use of wetland vegetation can take away a lot of N and P, up to 113.46kg / hm2 N and 17.08kg / hm2 P . By reed and cattail mowing Wuliangsuhai Lake each year also can remove a large amount of N, P , and up to 63.2 kg / hm2 N and 0.79 kg / hm2 P . Through the absorption and utilization of vegetation to remove the wetlands of N, P , in order to reduce eutrophication of the wetland is feasible .

Characteristics of the Wetland Vegetations and Their Potential Capacity for Water Purification in Hetao Area

Abstract

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