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当前位置: 首页 > 文章 > 氮肥对紫色土夏玉米N_2O排放和反硝化损失的影响 浙江大学学报(农业与生命科学版) 2007,33 (5) 574-583
Position: Home > Articles > Effects of nitrogen fertilizer for maize on denitrification loss and N_2O emission in purple soil Journal of Zhejiang University (Agriculture and Life Sciences) 2007,33 (5) 574-583

氮肥对紫色土夏玉米N_2O排放和反硝化损失的影响

作  者：
项虹艳;朱波;王玉英;李侃;段文霞
单  位：
四川农业大学资源与环境学院;中国科学院成都山地灾害与环境研究所;四川省农业管理干部学院
关键词：
紫色土;玉米;N2O排放量;反硝化损失;氮肥水平;氮肥品种
摘  要：
利用原状土柱-乙炔抑制法对不同施氮量和不同氮肥品种下紫色土种植玉米期间的N2O排放量和反硝化损失量进行测定.结果表明:①施氮处理的反硝化损失量和N2O排放量显著高于不施氮肥处理;施氮量间反硝化损失量和N2O排放量差异不显著.不施氮肥、中氮和高氮的反硝化损失量分别是4.11kg·hm-2、11.84kg·hm-2、10.02kg·hm-2,N2O排放量分别是1.29kg·hm-2、4.84kg·hm-2和4.53kg·hm-2;中氮和高氮的反硝化损失量分别占施氮量的5.16%和2.36%,N2O排放量分别占施氮量的1.3%和3.98%.②不同氮肥品种处理间的反硝化损失量和N2O排放量也有显著差异.尿素、硫酸铵、硝酸钾反硝化损失量分别为14.27kg·hm-2、10.51kg·hm-2、12.79kg·hm-2,反硝化损失占施氮量的6.61%、4.11%和5.62%;N2O排放量分别是7.15kg·hm-2、4.35kg·hm-2和4.34kg·hm-2,占施氮量的3.17%、1.30%和1.30%.施用尿素(酰胺态氮肥)的反硝化损失量和N2O排放量显著高于施用硫酸铵(铵态氮肥)和硝酸钾(硝态氮肥).③土壤中无机氮含量是影响本区土壤硝化和反硝化作用的限制因子;降雨是影响该区土壤N2O排放和反硝化损失的主要因素.④反硝化作用是紫色土夏季氮素损失的主要途径.
译  名：
Effects of nitrogen fertilizer for maize on denitrification loss and N_2O emission in purple soil
作  者：
XIANG Hong-yan1,2,ZHU Bo1,WANG Yu-ying1,LI Kan3,DUAN Wen-xia4(1.Chengdu Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China;2.Graduate University,Chinese Academy of Sciences,Beijing 100039,China;3.College of Resource and Environment,Sichuan Agricultural University,Ya'an,Sichuan 625014,China;4.Sichuan Province Agricultural Management Cadre College,Chengdu 610071,China
关键词：
purple soil;maize;N2O emission;denitrification loss;N-fertilizer rate;N-fertilizer type
摘  要：
The intact soil core-acetylene inhibition technique was used to study the effects of N-fertilizer application rates and types on the denitrification losses and N2O emissions in a calcareous purple soil-maize crop system in the upland area of central Sichuan Basin.The results showed:i)The total N2O emissions and denitrification losses in the fertilized treatments were significantly higher than that in the unfertilized treatment.But there was no significant difference between the middle N(MN)and high N treatment(HN).The denitrification losses were 4.11 kg·hm-2,11.84 kg·hm-2,10.02 kg·hm-2 from the CK,MN and HN,respectively,and the total N losses derived from the nitrogen applied in the MN and HN were 5.16% and 2.36%.N2O emissions were 1.29 kg·hm-2,4.84 kg·hm-2 and 4.53 kg·hm-2 from the CK,MN,HN,respectively,and the total N losses derived from the nitrogen applied in the MN and HN were 1.30% and 3.98%,respectively.ii)The denitrification loss and N2O emissions also had significant difference among the nitrogen types.The denitrification loss were 14.27 kg·hm-2,10.51 kg·hm-2,12.79 kg·hm-2,and the total losses from the N applied were 6.61%,4.11%,and 5.62% from the CO(NH2)2,(NH4)2SO4 and KNO3,respectively.N2O emissions were 7.15 kg·hm-2,4.35 kg·hm-2 and 4.34 kg·hm-2,and the total N losses were 3.17%,1.30% and 1.30%.The denitrification loss and N2O emission from the CO(NH2)2(UN)was significantly higher than that from the(NH4)2SO4(AN)and KNO3(NN).iii)Mineral N content in soil is the limiting factor for nitrification and denitrification,and precipitation is the dominating factor influencing the denitrification loss and N2O emission.iv)Denitrification process is the main loss way of N-fertilizer during summers in calcareous purple soil.

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