Identifying the Tillage Effects on Phosphorus Export from Phaeozems-Dominated Agricultural Watershed: a Plot-Scale Rainfall-Runoff Study in Northeast China
- Авторлар: Zhou Y.1,2, Xu Y.2, Xiao W.1, Wang J.1, Hao C.1, Zhou P.1, Shi M.3
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Мекемелер:
- China Institute of Water Resources and Hydropower Research
- School of Renewable Natural Resources
- Liuyang Environment Protection Monitoring Station
- Шығарылым: Том 50, № 12 (2017)
- Беттер: 1494-1505
- Бөлім: Agricultural Chemistry and Soil Fertility
- URL: https://journals.rcsi.science/1064-2293/article/view/224313
- DOI: https://doi.org/10.1134/S1064229317130075
- ID: 224313
Дәйексөз келтіру
Аннотация
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.
Авторлар туралы
Yuyan Zhou
China Institute of Water Resources and Hydropower Research; School of Renewable Natural Resources
Email: xwsen998@163.com
ҚХР, Beijing, 100038; Baton Rouge, LA, 70803
Y. Xu
School of Renewable Natural Resources
Email: xwsen998@163.com
АҚШ, Baton Rouge, LA, 70803
Weihua Xiao
China Institute of Water Resources and Hydropower Research
Хат алмасуға жауапты Автор.
Email: xwsen998@163.com
ҚХР, Beijing, 100038
Jianhua Wang
China Institute of Water Resources and Hydropower Research
Email: xwsen998@163.com
ҚХР, Beijing, 100038
Cailian Hao
China Institute of Water Resources and Hydropower Research
Email: xwsen998@163.com
ҚХР, Beijing, 100038
Pu Zhou
China Institute of Water Resources and Hydropower Research
Email: xwsen998@163.com
ҚХР, Beijing, 100038
Min Shi
Liuyang Environment Protection Monitoring Station
Email: xwsen998@163.com
ҚХР, Changsha, 410300