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Article

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

Rural Homestead Research Division, Agricultural Information Institute of CAAS, Beijing 100081, China
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Academic Editors: Mohammad Ibrahim Al-Wabel, Adel R.A. Usman, Abdullah Alfarraj and Munir Ahmad
Sustainability 2021, 13(14), 7982; https://doi.org/10.3390/su13147982
Received: 15 May 2021 / Revised: 12 July 2021 / Accepted: 14 July 2021 / Published: 16 July 2021
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. View Full-Text
Keywords: crop layout; N and P balance; chemical fertilizer; N and P surplus; N and P use efficiency crop layout; N and P balance; chemical fertilizer; N and P surplus; N and P use efficiency
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MDPI and ACS Style

Zhao, Z.; Fan, B. Evaluating the Impact of Crop Layout Changes on N and P Nutrient Balance: A Case Study in the West Liaohe River Basin, China. Sustainability 2021, 13, 7982. https://doi.org/10.3390/su13147982

AMA Style

Zhao Z, Fan B. Evaluating the Impact of Crop Layout Changes on N and P Nutrient Balance: A Case Study in the West Liaohe River Basin, China. Sustainability. 2021; 13(14):7982. https://doi.org/10.3390/su13147982

Chicago/Turabian Style

Zhao, Zijuan, and Beilei Fan. 2021. "Evaluating the Impact of Crop Layout Changes on N and P Nutrient Balance: A Case Study in the West Liaohe River Basin, China" Sustainability 13, no. 14: 7982. https://doi.org/10.3390/su13147982

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