https://scholars.lib.ntu.edu.tw/handle/123456789/625075
標題: | Application of Soil and Water Assessment Tool (SWAT) to evaluate the fates of nitrogenous fertilizer in subtropical mountainous watershed tea farms | 作者: | Lin G.-Z Hsu S.-Y Ho C.-C Chen C.-F JR-CHUAN HUANG Lee T.-Y. |
關鍵字: | Diffuse pollution; Fertilization strategy; Nitrate flux; Sustainable agricultural practices; Taiwan | 公開日期: | 2022 | 卷: | 194 | 期: | 3 | 來源出版物: | Environmental Monitoring and Assessment | 摘要: | Extensive nutrient loss is one of the most challenging issues faced by agricultural production regions worldwide. However, diffuse pollution in the subtropical mountainous watersheds is rarely simulated. A watershed model with regional parameter values is essential for watershed management. In this study, SWAT, one of the most popular models was applied to simulate daily discharge (years of 2008–2014), NO3-N flux (2012–2014), and tea yield (2012–2014) in the Ping-Lin watershed (PLW) of Taiwan, as well as to test the effectiveness of a modified fertilization strategy. The results demonstrated that SWAT was capable of simulating daily discharge variation, daily riverine NO3-N flux, and tea yield in the PLW. NO3-N yield of the tea farm (47 kg/ha/yr) was 9 times higher than that of the forest (5.1 kg/ha/yr). A significant proportion (~ 50%) of the input nitrogen (including dry/wet deposition and fertilizer) infiltrated into the soil, resulting in a poor fertilizer uptake efficiency of the tea tree. It was demonstrated that the modified fertilization strategy (apply fertilizer in small rainfall event, i.e., daily rainfall < 20 mm/day, and not in a single day) could increase the nitrogen uptake and harvest yield of the tea tree by 14% and 4%, respectively, with a 10% reduction in nitrogen input. Furthermore, this strategy significantly reduced the nitrogen yields from surface flow (75%), lateral flow (36%), percolation (50%), and groundwater (48%). A popular model with verified parameter values could help in developing a win–win strategy for both farmers and regulators, thus realizing the goals of sustainable agricultural practices. © 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125213259&doi=10.1007%2fs10661-022-09858-0&partnerID=40&md5=ef9e1706116dd614d381bcda0ed16353 https://scholars.lib.ntu.edu.tw/handle/123456789/625075 |
ISSN: | 01676369 | DOI: | 10.1007/s10661-022-09858-0 | SDG/關鍵字: | Forestry; Groundwater; Nitrogen fertilizers; Rain; Soil conservation; Solvents; Tropics; Water conservation; Water management; Water pollution; Agricultural practices; Diffuse pollution; Fertilisation; Fertilization strategy; Nitrate fluxes; Soil and Water assessment tools; Sustainable agricultural; Sustainable agricultural practice; Taiwan; Tea farm; Watersheds; ground water; nitrate; nitrogen; fertilizer; nitric acid derivative; nitrogen; water; agricultural practice; agricultural production; environmental fate; fertilizer; nitrate; soil and water assessment tool; tea; water pollution; watershed; agricultural land; Article; flow; forest; harvest; mountain; Soil and Water Assessment Tool model; soil fertilization; soil pollution; Taiwan; tea; tropics; watershed; agriculture; environmental monitoring; soil; Taiwan; Agriculture; Environmental Monitoring; Farms; Fertilizers; Nitrates; Nitrogen; Soil; Tea; Water |
顯示於: | 地理環境資源學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。