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[Soil nutrient leaching patterns in maize field under different fertilizations: an in situ study]
Zong-xin Li1, Shu-ting Dong, Kong-jun Wang
1State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai' an 271018, Shandong, China. lizx@saas.ac.cn
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|April 19, 2008
Summary
Different fertilization strategies impact nutrient leaching in summer maize fields. Wheat stalk plus nitrogen application significantly increases nitrogen, phosphorus, and potassium leaching compared to nitrogen fertilization alone.
Area of Science:
- Soil Science
- Agronomy
- Environmental Science
Background:
- Nutrient leaching from agricultural soils poses environmental risks.
- Understanding fertilizer impacts on nutrient loss is crucial for sustainable agriculture.
Purpose of the Study:
- To investigate the effects of various fertilization methods on nutrient leaching in brown soil during summer maize cultivation.
- To identify key factors influencing nutrient loss and compare different application strategies.
Main Methods:
- An in situ field experiment utilizing lysimeters was conducted.
- Measurements focused on nutrient content (NO3- -N, NH4+ -N, available P, available K) in leached water.
- Data were collected throughout the summer maize growth season.
Main Results:
- Abundant rainfall and irrigation were primary drivers of nutrient leaching.
- Leaching losses were highest early in the maize growth cycle and decreased over time.
- Wheat stalk plus nitrogen application led to greater leaching of N, P, and K compared to N fertilization alone.
- Nitrogen leaching primarily occurred as nitrate (NO3- -N), with losses increasing with higher N application rates.
- Low N treatments showed higher leaching rates than high N treatments.
Conclusions:
- Fertilization practices, particularly the inclusion of wheat stalk with nitrogen, significantly influence nutrient leaching dynamics.
- Management strategies should consider the timing and type of fertilizer application to minimize nutrient loss and environmental impact.
- Further research is needed to optimize fertilization for reduced leaching and improved nutrient use efficiency.
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