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农业科学学报 (英文)
2016,15
(7)
Position: Home > Articles > Soil nutrient loss due to tuber crop harvesting and its environmental impact in the North China Plain
Journal of Integrative Agriculture
2016,15
(7)
Soil nutrient loss due to tuber crop harvesting and its environmental impact in the North China Plain
作 者：
Yu Han-qing;Li Yong;Zhou Na;Chappell, Adrian;Li Xiao-yu;Poesen, Jean
单 位：
Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Agr Clean Watershed Res Grp, Beijing 100081, Peoples R China;Katholieke Univ Leuven, Div Geog, B-3001 Heverlee, Belgium;CSIRO Land & Water Natl Res Flagship, Canberra, ACT 2601, Australia
关键词：
soil nutrient losses;potato;sweet potato;crop harvesting;water pollution
摘 要：
Soil loss due to crop harvesting (SLCH) is a soil erosion process that significantly contributes to soil degracthtion in croplands. However, little is known about soil nutrient losses caused by SLCH and its environmental impacts. In the North China Plain area, we measured the losses of soil organic carbon (SOC) and nitrogen as well as phosphorus due to SLCH and assessed their relationship with soil particle size composition, agronomic practices and soil moisture content. Our results show that the losses by harvesting potato of SOC, total nitrogen (TN), available nitrogen (AN), available phosphorus (AP) and total phosphorus (TP) were 1.7, 1.8, 1.8, 15.9 and 14.1 times compared by harvesting sweet potato, respectively. The variation of SOC, N and P loss by SLCH are mainly explained by the variation of plant density (PD) (17-50%), net mass of an individual tuber (M-crop/p) (16-74%), soil clay content (34-70%) and water content (19-46%). Taking into account the current sewage treatment system and the ratio of the nutrients adhering to the tubers during transportation from the field (NTRP/SP), the loss of TN and TP by harvesting of potato and sweet potato in the North China Plain area amounts to 3% N and 20% P loads in the water bodies of this region. The fate of the exported N and P in the sewage treatment system ultimately controls the contribution of N and P to the pollution of lakes and rivers. Our results suggest that a large amount of SLCH-induced soil nutrient export during transportation from the field is a potential pollutant source for agricultural water for vast planting areas of tuber crops in China, and should not be overlooked.
作 者：
YU Han-qing;LI Yong;ZHOU Na;Adrian Chappell;LI Xiao-yu;Jean Poesen;Agricultural Clean Watershed Research Group, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences (CAAS);CSIRO Land & Water National Research Flagship;Division of Geography;
关键词：
soil nutrient losses;;potato;;sweet potato;;crop harvesting;;water pollution
摘 要：
Soil loss due to crop harvesting(SLCH) is a soil erosion process that significantly contributes to soil degradation in croplands. However, little is known about soil nutrient losses caused by SLCH and its environmental impacts. In the North China Plain area, we measured the losses of soil organic carbon(SOC) and nitrogen as well as phosphorus due to SLCH and assessed their relationship with soil particle size composition, agronomic practices and soil moisture content. Our results show that the losses by harvesting potato of SOC, total nitrogen(TN), available nitrogen(AN), available phosphorus(AP) and total phosphorus(TP) were 1.7, 1.8, 1.8, 15.9 and 14.1 times compared by harvesting sweet potato, respectively. The variation of SOC, N and P loss by SLCH are mainly explained by the variation of plant density(PD)(17–50%), net mass of an individual tuber(Mcrop/p)(16–74%), soil clay content(34–70%) and water content(19–46%). Taking into account the current sewage treatment system and the ratio of the nutrients adhering to the tubers during transportation from the field(NTRP/SP), the loss of TN and TP by harvesting of potato and sweet potato in the North China Plain area amounts to 3% N and 20% P loads in the water bodies of this region. The fate of the exported N and P in the sewage treatment system ultimately controls the contribution of N and P to the pollution of lakes and rivers. Our results suggest that a large amount of SLCH-induced soil nutrient export during transportation from the field is a potential pollutant source for agricultural water for vast planting areas of tuber crops in China, and should not be overlooked.
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Soil nutrient loss due to tuber crop harvesting and its environmental impact in the North China Plain [Han‐Qing Yu, Yong Li, Na Zhou, Adrian Chappell, Xiaoyü Li, Jean Poese] 农业科学学报(英文版) 2016,15 (7)
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