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首页> 外文期刊>American-Eurasian Journal of Agricultural and Environmental Sciences >Accumulation and Leaching Risk of Soil Phosphorus in Lei Bamboo Stands in the Upper Reaches of Taihu Lake
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Accumulation and Leaching Risk of Soil Phosphorus in Lei Bamboo Stands in the Upper Reaches of Taihu Lake

机译：太湖上游雷竹林土壤磷的积累与淋溶风险。

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摘要

Phosphorus accumulation and losses were measured in the soils in Lei bamboo (Phyllostachys praecox) stands located in the upper reaches of Taihu Lake to determine evolution trend of soil P and its leaching risk. The contents of total P (TP) and available P (AP) in the soils increased with time or cultivation ages and decline with soil depth. Average annual rate of P accretion in 0-25 cm plow layer during 1999-2010 were 102 kg ha~(-1) yr~(-1) . Rates of P accretion in 0-20. 20-40. 40-60 and 60-80 cm soil depth with 15 year-cultivation history were 135, 65, 40 and 20 kg ha~(-1) yr~(-1) , respectively. The average contents of AP in the soils decreased in the order: Lei bamboo stand (652 mg kg~(-1) ) > vegetable land (386 mg kg~(-1) ) > Lei bamboo standand Masson pine stands (6.1-6.6 mg kg~(-1) ). Total P leaching loads via infiltration and runoff water in the treatments applied P ranged from 4.32 to 7.77 kg ha~(-1) , which accounted for 5.3 to 7.5% of total P rates applied. Application of median P +pig manure,median P and phosphate rock decreased TP leaching loads by 15.4, 36.2 and 44.4%, respectively, as compared to the high P treatment. It is concluded that Lei bamboo stands have become important agricultural nonpoint source pollution in the upper reaches of Taihu Lake.
机译：在太湖上游的雷竹（Phyllostachys praecox）林分中测量了土壤中磷的积累和损失，以确定土壤P的演变趋势及其浸出风险。土壤中总磷（TP）和有效磷（AP）的含量随时间或耕龄的增加而增加，随土壤深度的增加而减少。在1999-2010年间0-25 cm耕层中P的年平均生长速率为102 kg ha〜（-1）yr〜（-1）。 P的吸收率在0-20之间。 20-40。已有15年耕作历史的40-60和60-80 cm土壤深度分别为135、65、40和20 kg ha〜（-1）yr〜（-1）。土壤中AP的平均含量依次降低：雷竹林（652 mg kg〜（-1））>菜地（386 mg kg〜（-1））>雷竹林和马尾松林（6.1-6.6） mg kg〜（-1））。在施磷处理中，通过渗透和径流水的总磷淋失负荷为4.32至7.77 kg ha〜（-1），约占施磷总量的5.3至7.5％。与高磷处理相比，施用中位数P +猪粪，中位数P和磷酸盐岩分别使TP淋溶负荷降低了15.4％，36.2％和44.4％。结论是，雷竹林已成为太湖上游重要的农业面源污染。

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