Assessing potassium environmental losses from a dairy farming watershed with the modified SWAT model
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- 作者：Chunying Wanga ; b ; wangchunying1987@yahoo.com" class="auth_mail" title="E-mail the corresponding author ; Rui Jiangc ; Laurie Boithiasd ; Sabine Sauvaged ; José ; -Miguel Sá ; nchez-Pé ; rezd ; Xiaomin Maoe ; Yuping Hana ; Atsushi Hayakawaf ; Kanta Kuramochib ; Ryusuke Hatanob
- 关键词：Potassium ; Solid&ndash ; liquid distribution ; Stream load ; Plant uptake ; Potassium budget ; SWAT-K
- 刊名：Agricultural Water Management
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：175
- 期：Complete
- 页码：91-104
- 全文大小：2081 K
文摘
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The SWAT model was upgraded with a new potassium (K) module.
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Model outputs were compared to observed stream dissolved K load and plant K yield.
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The validated modified model allowed quantifying the K budget at watershed scale.
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Soil K surplus was estimated 75 kg ha−1 year−1; plant K uptake was 28 kg ha−1 year−1.
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Adsorption maximum for K normalized for clay content was 4 to 20 g K kg−1