农业资源与环境学报Issue(3)：253-258,6.DOI:10.13254/j.jare.2013.0237
设施高肥力蔬菜地氮素调控下磷素特征研究
Phosphorus Characteristics with Controlled Nitrogen in Fertile Soils in Protected Vegetable Field
摘要
Abstract
There is an unreasonable phenomenon of fertilization in vegetable facility cultivation, with the serious imbalance of soil nutrient. In purpose of understanding the absorption characteristics of phosphorus from nitrogen-rich soil, a long-term nitrogen-controlled experiment was carried from the year 2004 to 2007, and a split plot experiment of leaching was carried in winter-spring season of 2007. The results showed that the content of phosphorus varied with different nitrogen control. The TP was decreased with nitrogen supply of none (NN)、or-ganic manure(MN)、organic manure and straw(MN+S), and the decreased range was NN>MN>MN+S, meanwhile the increase range of TP was traditional-nitrogen(CN)>traditional-nitrogen+straw(CN+S)>optimized-nitrogen+straw(SN+S)>optimized-nitrogen(SN). The available P with CN and CN+S reached to 213.7 mg·kg-1、225.4 mg·kg-1, which increased by 17.1 percent and 23.5 percent, which declared the phos-phorus was accumulated;The available P with other nitrogen controlled decreased with the range of NN>MN>MN+S>SN+S>SN>CN>CN+S, which showed that the supply reduction of nitrogen could slowdown the phosphorus accumulated and promote the utilization ratio of phospho-rus. The organophosphorus was increased except NN, with obvious increase with CN、CN+S (308.4 mg·kg-1、331.4 mg·kg-1)by 28.5 percent and 38.2 percent. The absorption coefficient of phosphorus with SN+S (P2O5,mg·100 g-1)reached to 1 571, increased by 143.6 percent;Otherwise the absorption coefficient of phosphorus with CN、CN+S showed negative growth, the CN dipped to 416 (P2O5,mg·100 g-1)by 35.5 percent. Adding wheat straw could greatly improved the capacity of absorption of phosphorus and slow down the accumulation of available phosphorus to some extent. The concentrations of total phosphorus in the filtrate with SN+S were less than SN, contrary to the concentration of organophosphorus, thus the straw returning had a certain effect on stopping the organophosphorus leaching, the concentrations of total phos-phorus in the filtrate was 2.62~12 mg·L-1, and the concentrations of organophosphorus was 0.42~4.12 mg·L-1, both of them exceeded the na-tional security quality standards of water. Consequently, control-optimization supply of nitrogen in high fertile soil could promote the absorp-tion and utilization of phosphorus, and had directive significance to guide famer’s fertilization. Reducing the supply of nitrogen and returning the straw with high carbon are suggested to improve the utilization rate of fertilizer and reduce the pollution of nitrogen and phosphorus in soil and water bodies.关键词
设施/氮素调控/秸秆/磷/淋洗Key words
facility/nitrogen controlled/straw/phosphorus/leaching分类
农业科技引用本文复制引用
王恒,金圣爱,李俊良,董家贵,张兰芳,陈为堂,葛晓梅..设施高肥力蔬菜地氮素调控下磷素特征研究[J].农业资源与环境学报,2014,(3):253-258,6.基金项目
国家“十一五”科技支撑项目（2006BAD17B07）；农业部948项目（2006-G60（2）） （）
