scholarly journals Evaluating the Impact of Crop Layout Changes on N and P Nutrient Balance: A Case Study in the West Liaohe River Basin, China

2021 ◽  
Vol 13 (14) ◽  
pp. 7982
Author(s):  
Zijuan Zhao ◽  
Beilei Fan
Keyword(s):  
River Basin ◽  
Nutrient Balance ◽  
Fertilizer Application ◽  
Chemical Fertilizer ◽  
The West ◽  
Liaohe River ◽  
Nutrient Surplus ◽  
P Balance ◽  
Liaohe River Basin ◽  
The Impact

Regional crop layout has changed significantly due to climate, policy, and other factors, which has impacted farmland nutrient balance. Here, we evaluated the impact of crop layout changes on N and P nutrient balance in the West Liaohe River Basin from 2000–2015. The study area has long been in a N and P surplus state. The unit N surplus exhibited a downward trend and the unit P surplus showed an increasing trend. Significant correlations existed between planting areas and nutrient surplus. The N and P surplus layout was mainly concentrated in the West Liaohe River lower reaches basin. The planting area of wheat must be reduced and the areas of maize and soybean must be controlled to adjust the N and P balance and reduce the environmental pollution risk. Chemical fertilizer and seed inputs are the main sources of N input. Furthermore, combining farming and pastoral farming is conducive to improving N and P use efficiency. Manure can be absorbed by farmland, the ratio of organic and chemical fertilizers can be reasonably set, and chemical fertilizer application can be reduced.

scholarly journals Changes in Crop Layout, Effects on Farmland Nutrient Balance: A Case Study in The West Liaohe River Basin, China

2021 ◽  
Author(s):  
Zijuan Zhao ◽  
Beilei Fan
Keyword(s):  
River Basin ◽  
Critical Role ◽  
Nutrient Balance ◽  
Utilization Efficiency ◽  
Nitrogen And Phosphorus ◽  
The West ◽  
Liaohe River ◽  
Nutrient Surplus ◽  
Liaohe River Basin ◽  
The Impact

Abstract: Estimating regional soils Nitrogen and phosphorus balance in cropland is essential to improve management practices, reduce environmental risks and develop sustainable agriculture. In this study,spatial and temporal variations in crop layout, the impact on soil N and P nutrient balance were assessed from 2000 to 2015 in the West Liaohe River Basin between 2000 and 2015. The result shows that the area of cropland is on the rise, and the spatial distribution of arable land is consistent with the distribution of the main tributaries of the West Liaohe River basin. The change in planting layout for maize and soybeans has a significant impact on the nutrient balance of farmland, which plays a critical role in modifying surplus nutrients. Nutrient surpluses on farmland were mostly concentrated in areas where maize planting layout changed between 2000 and 2015. The N nutrient surplus rate decreased by 39.3%, N utilization efficiency, increased by 70.7%; P nutrient surplus rate decreased by 3.8%, and P utilization efficiency increased by 49.3%. The average utilization efficiencies of N and P nutrients were 27.8% and 9.1%, respectively, and the utilization efficiency was low. Chemical manure is the main source of nutrients. The risk of phosphorus pollution was higher than the risk of nitrogen pollution in the West Liaohe River Basin. The lower Liaohe River Basin (below the Sujiapu) was the region with the most violent changes in nitrogen and phosphorus nutrient balance. It is recommended that reduce the amount of chemical fertilizer application, especially, reduce the amount of P application, improve the ef-ficiency of nutrient use, and focus on strengthening pollution control in key areas such as the West Liaohe River lower reaches basin (below Sujiabao), reducing the risk of agricultural nonpoint source pollution.

scholarly journals Groundwater Depletion in the West Liaohe River Basin, China and Its Implications Revealed by GRACE and In Situ Measurements

2018 ◽  
Vol 10 (4) ◽  
pp. 493 ◽  
Author(s):  
Yulong Zhong ◽  
Min Zhong ◽  
Wei Feng ◽  
Zizhan Zhang ◽  
Yingchun Shen ◽  
...  
Keyword(s):  
River Basin ◽  
In Situ Measurements ◽  
Groundwater Depletion ◽  
The West ◽  
Liaohe River ◽  
Liaohe River Basin

Groundwater Storage Dataset Derived from GRACE and In Situ Measurements in the West Liaohe River Basin, China

GCdataPR ◽  
2020 ◽  
Author(s):  
Yulong ZHONG ◽  
Yulong ZHONG ◽  
Min ZHONG ◽  
Min ZHONG ◽  
Wei FENG ◽  
...  
Keyword(s):  
River Basin ◽  
In Situ Measurements ◽  
The West ◽  
Groundwater Storage ◽  
Liaohe River ◽  
Liaohe River Basin

Environment Study on Liaohe River Basin Ecological Footprint and Ecological Restoration Measures

2013 ◽  
Vol 830 ◽  
pp. 372-375 ◽  
Author(s):  
Yang Wang ◽  
Yu Min Shi ◽  
Jun Zhao
Keyword(s):  
Water Quality ◽  
Environmental Pollution ◽  
Ecological Restoration ◽  
River Basin ◽  
Pollution Control ◽  
Ecological Footprint ◽  
Liaohe River ◽  
Environment Study ◽  
Liaohe River Basin ◽  
Restoration Measures

Liaohe River is one of seven big river in China, its environmental pollution control is an important task all the time. In this paper, Liaohe River basin ecological footprint was introduced, water quality and ecological restoration measures were analyzed in the period of the 9th Five-Year, the 10th Five-Year and the 11th Five-Year, the development on ecological restoration in the 12th Five-Year was put forward.

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