scholarly journals Scaling of nitrogen and phosphorus across plant organs in shrubland biomes across Northern China

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Xian Yang ◽  
Zhiyao Tang ◽  
Chengjun Ji ◽  
Hongyan Liu ◽  
Wenhong Ma ◽  
...  
Keyword(s):  
Northern China ◽  
Nitrogen And Phosphorus ◽  
Plant Organs

Mechanism Analysis and Experimental Research on the Interception of Nitrogen and Phosphorus Pollutants by Gullies in Northern China

2011 ◽  
Vol 250-253 ◽  
pp. 3392-3396
Author(s):  
Yu Jia Song ◽  
Hui Qing Liu
Keyword(s):  
Total Phosphorus ◽  
Nitrate Nitrogen ◽  
Northern China ◽  
Careful Analysis ◽  
Ammonia Nitrogen ◽  
Mechanism Analysis ◽  
Nitrogen And Phosphorus ◽  
Urban Sewage ◽  
Control Section ◽  
Nitrogen Pollutants

The discharge of urban sewage and agricultural non-point source pollutants is the main reason causing eutrophication in gullies in most cities of northern China. Based on a careful analysis on the ecological structure and ecological characteristics of a gully, this article preliminarily studies the interception and degradation mechanisms of nitrogen pollutants by the gully. Meanwhile, to take gullies in Changchun as the object of the study, this article carries out an experiment on the interception effect of nitrogen pollutants by gullies. This experiment respectively establishes a control section in the upper and lower reaches of a gully, and takes water samples four times in each section from May to August to determine total nitrogen, total phosphorus, nitrate nitrogen, ammonia nitrogen and salinity. The result shows: the gully plays some role in the interception of pollutants; total phosphorus accounts for the largest interception in pollutants in the experimented gully section, with the relative interception rate of 27.46%, followed by ammonia nitrogen, with the interception rate of 21.80%, which is the result of the combined effects of aquatic plants, microorganisms and sediment in the gully.

scholarly journals Enhancement of Carbon Sequestration in Soil in the Temperature Grasslands of Northern China by Addition of Nitrogen and Phosphorus

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e77241 ◽  
Author(s):  
Nianpeng He ◽  
Qiang Yu ◽  
Ruomeng Wang ◽  
Yunhai Zhang ◽  
Yang Gao ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Northern China ◽  
Nitrogen And Phosphorus

scholarly journals Nitrogen and Phosphorus Purification in Simulated Wastewater By Two Aquatic Plants

2021 ◽  
Author(s):  
Jianling Xu ◽  
Jiao Liu ◽  
Jiaqi Hu ◽  
Hanxi Wang ◽  
Lianxi Sheng ◽  
...  
Keyword(s):  
Aquatic Plants ◽  
Removal Rate ◽  
Low Cost ◽  
Domestic Wastewater ◽  
Northern China ◽  
Pollutant Concentration ◽  
Nitrogen And Phosphorus ◽  
Simulated Wastewater ◽  
High Level ◽  
Static Conditions

Abstract Aquatic plants have attracted wide attention because of their low cost and high level of resource utilization. In order to study the effects of emergent and submerged plants on the purification of different concentrations of wastewater, two common aquatic plants found in Northeast China, Iris ensata Thunb. and Potamogeton malaianus Miq., were selected Under static conditions, nitrogen and phosphorus removal from simulated wastewater with different concentrations (high, medium and low) and lake samples of Nanhu Park, Changchun, Jilin Province, China, were studied. The results showed that the removal rate of total nitrogen (TN) in medium- and high-pollutant concentration water samples and total phosphorus (TP) in medium- and low-pollutant concentration water with I. ensata reached more than 75%. The removal rate of TN in the medium-pollutant concentration water with P. malaianus reached 71.4%, while the removal efficiency of TN and TP in the low-pollutant concentration water was higher than 80%. It is more advantageous to use plants to purify high-pollutant concentration water after further purification. The purification plants suitable for medium-pollutant concentration water are limited, but under low-pollutant concentration water conditions, there are more diverse options regarding the choice of wastewater purification plants. In the Nanhu lake samples, I. ensata had the highest removal rates of TN (80.38%), and TP (85.62%). This study shows that both I. ensata and P. malaianus can be used as aquatic plants to restore the water quality of urban lakes. A reasonable combination of different plants for addressing different pollutants is more beneficial to improve the purification effect. This research provides an important basis for the phytoremediation and treatment of urban domestic wastewater and urban surface water bodies in northern China.

scholarly journals Stoichiometry of Carbon, Nitrogen and Phosphorus in Shrub Organs Linked Closely With Mycorrhizal Strategy in Northern China

2021 ◽  
Vol 12 ◽  
Author(s):  
Shuang Yang ◽  
Zhaoyong Shi ◽  
Menghan Zhang ◽  
Yang Li ◽  
Jiakai Gao ◽  
...  
Keyword(s):  
Nitrogen Concentration ◽  
Northern China ◽  
Nutrient Cycle ◽  
Ecosystem Functions ◽  
Phosphorus Concentration ◽  
Nitrogen And Phosphorus ◽  
Mycorrhizal Status ◽  
N Concentration ◽  
Stems And Leaves ◽  
The Impact

Mycorrhizal strategies include mycorrhizal statuses and mycorrhizal types, which are important reflections of the functional characteristics of ecosystems. The stoichiometry of carbon, nitrogen, and phosphorus in plant organs is an important part of ecosystem functions, which has an important impact on the nutrient cycle of the ecosystem. The concentration of carbon, nitrogen, and phosphorus played a crucial role in ecosystem functioning and dynamics. The purpose of this study is to provide theoretical basis and data support for improving the properties of global terrestrial ecosystems by exploring the impact of mycorrhizal strategies on the stoichiometry of C, N, and P in different shrub organs. In this study, stoichiometric patterns of carbon (C), nitrogen (N) and phosphorus (P) in different shrub organs under different mycorrhizal status or types were analyzed at 725 samples across Northern China. Results showed that in different mycorrhizal status, the highest carbon concentration in shrub organs appeared in the facultatively mycorrhizal (FM) mycorrhizal status, and the highest nitrogen concentration appeared in the Non-mycorrhizal (NM) mycorrhizal status. Under different mycorrhizal types, the nitrogen concentration in the shrub organs under the arbuscular mycorrhiza (AM) mycorrhizal type was the highest, and the phosphorus concentration under the ecto-mycorrhiza (ECM) mycorrhizal type was the highest. In the OM or FM mycorrhizal status, the concentrations of C, N, and P in the stems and leaves increase with the increase of the concentrations of C, N, and P in the roots. In the NM mycorrhizal status, the N concentration in the stems and leaves increases with the increase of the N concentration in the roots. Under AM, AM+ECM, and ECM mycorrhizal type, the concentrations of C, N, and P are closely related in roots, stems and leaves. The content of plant nutrients in different organs is closely related. It turned out that mycorrhizal statuses or types are able to alter the allocation of C, N, and P in different organs, and the relationships of C, N, and P among different organs are able to present different trend with the varying of mycorrhizal statuses or types.

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