华北农学报Issue(z1)：400-404,5.DOI:10.7668/hbnxb.2015.S1.072
施用椰壳生物炭对砖红壤氮素淋失和油麦菜吸收利用的影响
Impacts of Biochar Addition on Nitrogen Leaching and Use Efficiency of Leaf-used Lettuce
摘要
Abstract
It is very important for non-point pollution control to using appropriate agronomic approaches to re-duce nitrogen leaching loss from soil.This experiment was conducted to clarify the impacts of biochar addition on leaf-used lettuce growth,nitrogen utilization and leaching.With pot experiment,leaching amounts of different form nitrogen,agronomic characteristics and nitrogen uptake of leaf-used lettuce were determined under no fertilizer, chemical fertilizer,humic acid fertilizer and application.The results showed that the dissolved organic nitrogen (DON) accounted for 73.8% -77.5% of total N leaching.Among all treatments,the highest amout of N was leached for the conventional treatment,and its ammonium nitrogen(AN),nitrate nitrogen(NN),DON and total ni-trogen (TN) leaching were 3.9,48.3,163.2,215.4 mg/pot,respectively.Compared with chemical fertilizer treat-ment,AN,NN,DON and TN leaching with coconut shell biochar (1%,2%,5%;m/m) were reduced by 40.6% -52.4%,28.8% -54.9%,22.7% -55.5% and 24.4% -55.4%.The biomass of leaf-used lettuce and N use ef-ficiency with biochar application increased 9.46% -26.44% and 9.86% -13.61%,respectively.However,its o-ver-application affected the biomass accumulation of leaf-used lettuce and restrained its root growth.The biomass of leaf-used lettuce was up to the maximum with the 3.2% (m/m) biochar admentment.关键词
砖红壤/油麦菜/椰壳生物炭/氮淋失/氮素利用率Key words
Latosol/Leaf-used lettuce/Coconut shell biochar/N leaching/N use efficiency分类
农业科技引用本文复制引用
赵凤亮,邹雨坤,朱治强,李虹,李勤奋..施用椰壳生物炭对砖红壤氮素淋失和油麦菜吸收利用的影响[J].华北农学报,2015,(z1):400-404,5.基金项目
农业部农业环境重点实验室开放基金项目（KLAE201303）；海南省自然科学基金项目（314106）；国家自然科学基金项目 （）
