水土保持学报2025，Vol.39Issue(2)：82-91,10.DOI:10.13870/j.cnki.stbcxb.2025.02.003
设施菜地养分累积现状及氮磷流失特征
Characteristics of Soil Nutrients Accumulation and Nitrogen and Phosphorus Loss of Greenhouse Vegetable Field
摘要
Abstract
[Objective]This study aimed to clarify the characteristics of soil nutrient accumulation and nitrogen and phosphorus loss for the greenhouse vegetable in Jiangxi Province,thereby providing scientific data for the accurate evaluation on pollution risk and promoting the healthy development of vegetable industry in this province.[Methods]Multipoint sampling was used for analysis cumulative amount of nutrients within the 0-100 cm depth soil layer in greenhouse vegetable throughout 11 cities and districts of this province,and in situ monitoring was used to analyze the characteristics of nitrogen and phosphorus loss.[Results]1)The soil was severely acidified.The soil layers within 0-20 and 20-40 cm under surface showed pH values of 5.44 and 5.56,respectively.2)The soil nutrient content in 0-20 cm soil layer was at the medium fertility level,and the soil nutrient increased with the extension of planting time when the planting years were less than 10 years,and began to decline when the planting years were 11-20 years(except for available phosphorus).3)The runoff from greenhouse vegetable is mainly driven by rainfall and has the characteristics of high volume and low concentration;runoff occurs in the period from February to June accounts for more than 75%of the annual runoff amount and more than 60%of the annual nitrogen and phosphorus loss.[Conclusion]The 6-10 years might be a"turning point"for the cumulative contents of nutrients in greenhouse vegetable plots.Excessive use of nutrients after 6-10 years could not increase the storage capacity of the soil,but it might increase the risk of pollution caused by the accumulation of available nutrients.Due to the degenerated function of regulation,storage and purification of ditches and ponds,the generation of short-term,high-flow and low-concentration runoff water from greenhouse vegetable is difficult to be consumed in farmland ecosystem locally in at present.Therefore,the construction of greenhouse vegetable-single season rice composite farming model may be an effective means to solve the non-point source pollution of from greenhouse vegetable in red soil areas in southern China.关键词
设施菜地/种植年限/养分累积/氮磷流失/污染风险Key words
greenhouse vegetable soil/cultivating years/nutrients accumulation/nitrogen and phosphorus loss/pollution risk分类
资源环境引用本文复制引用
杨涛,陈院华,陈锋,徐昌旭,庄艳华,涂香明,陈静蕊..设施菜地养分累积现状及氮磷流失特征[J].水土保持学报,2025,39(2):82-91,10.基金项目
江西省科技创新高端人才(青年)项目(jxsq2019201074) （青年）
国家自然科学基金项目(U21A2025) （U21A2025）
