Identifying the Tillage Effects on Phosphorus Export from Phaeozems-Dominated Agricultural Watershed: a Plot-Scale Rainfall-Runoff Study in Northeast China
- Authors: Zhou Y.1,2, Xu Y.J.2, Xiao W.1, Wang J.1, Hao C.1, Zhou P.1, Shi M.3
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Affiliations:
- China Institute of Water Resources and Hydropower Research
- School of Renewable Natural Resources
- Liuyang Environment Protection Monitoring Station
- Issue: Vol 50, No 12 (2017)
- Pages: 1494-1505
- Section: Agricultural Chemistry and Soil Fertility
- URL: https://journals.rcsi.science/1064-2293/article/view/224313
- DOI: https://doi.org/10.1134/S1064229317130075
- ID: 224313
Cite item
Abstract
Evaluating tillage effects on soil phosphorus (P) loss at the plot-scale has significant implication for developing best management practices (BMPs) to protect water quality and soil productivity management in agricultural watersheds. This paper aims to quantify P loss from tilled soils under different rainfall patterns in a Phaeozems-dominated agricultural watershed. Eleven rainfall events were monitored at three experimental sites growing corns with conventional till, conservational till, and no-till during a growing season from July to August in 2013. Mean event mean concentration of dissolved phosphorus was 0.130, 0.213 and 0.614 mg L–1 and mean particulate phosphorus transfer rate was 103.502, 33.359 and 27.127 g ha–1 hr–1, respectively for three tillage practices. Results showed that less tillage practices could significantly reduce sediment runoff and PP loss, accompanied with a moderate reduction of runoff yield. While the proportion of PP has been cut down, the proportion of DP could account for the majority. Hydrological factors, including antecedent soil moisture and rainfall variables, could exert various effects on DP, PP and sediment losses under different tillage conditions. Further, the results of this study imply that the soil P loss management and water quality protection in black soil region of Northeast China should take consideration of diverse effects of tillage on phosphorus loss and the dynamics of P between different forms.
About the authors
Yuyan Zhou
China Institute of Water Resources and Hydropower Research; School of Renewable Natural Resources
Email: xwsen998@163.com
China, Beijing, 100038; Baton Rouge, LA, 70803
Y. Jun Xu
School of Renewable Natural Resources
Email: xwsen998@163.com
United States, Baton Rouge, LA, 70803
Weihua Xiao
China Institute of Water Resources and Hydropower Research
Author for correspondence.
Email: xwsen998@163.com
China, Beijing, 100038
Jianhua Wang
China Institute of Water Resources and Hydropower Research
Email: xwsen998@163.com
China, Beijing, 100038
Cailian Hao
China Institute of Water Resources and Hydropower Research
Email: xwsen998@163.com
China, Beijing, 100038
Pu Zhou
China Institute of Water Resources and Hydropower Research
Email: xwsen998@163.com
China, Beijing, 100038
Min Shi
Liuyang Environment Protection Monitoring Station
Email: xwsen998@163.com
China, Changsha, 410300