植物营养与肥料学报2017，Vol.23Issue(1)：154-161,8.DOI:10.11674/zwyf.16119
不同配比有机无机肥料对菜地N2O排放的影响
Effects of combined organic and inorganic fertilizers on N2O emissions in intensified vegetable field
摘要
Abstract
[Objectives] Effects of combined application of organic manure (M) and inorganic nitrogen fertilizers (N) on annual N2O emissions from vegetable fields were studied using the static chamber-gas chromatograph method.[Methods] Field experiments were established in triplicates with four treatments:CK (without N application),NPK,M1N1 (M and N in the ratio of 1 ∶ 1) and M2N1 (M and N in the ratio of 2 ∶ 1),and N amount was equally applied in the N-fertilized treatments.Coriander herb,water spinach,baby bok choy and spinach were cultivated in turn with short time of fallow in between.The N2O emissions were normally monitored in week frequency,but in every two days after fertilization and irrigation.Once N basal application was N 250 kg/hm2 for crop except for water spinach with twice application.The total N input during the experiment was 1250 kg/hm2.[Results] N2O emissions mainly emitted from April to October,which were significantly correlated with soil temperature in the 10 cm depth in all treatments.The N2O flux in NPK treatment had significant correlation with soil inorganic nitrogen content,but in CK,M1N1 and M2N1 treatments,the N2O fluxes had no significant correlations with soil nitrate,ammonium and inorganic nitrogen contents.In addition,WFPS (water filled pore space) ranged from 39％ to 59％ and no significant correlations between soil moisture and N2O fluxes were detected during the experimental period.Compared with NPK treatment,the vegetable yields of water spinach had been significantly improved in M 1N1 and M2N 1 treatments,but there were no significant differences in cumulative vegetable yields between M1N1,M2N1 and NPK treatments.Compared with the NPK treatment,the cumulative N2O emission and N2O emission factor (EF) in the M1N1 treatment was significantly decreased by 36％ and 64％,respectively.Meanwhile,compared with M2N1 treatment,the cumulative N2O emission and N2O emission factor (EF) in the M1N1 treatment was significantly decreased by 29％ and 56％,respectively.But the effect in reducing N2O emission was insignificantly in M2N1 treatment,compared with NPK treatment.[Conclusions] Appropriate ratio of chemical and organic fertilizer is necessary for mitigating N2O emissions in intensified vegetable fields.In the experimental conditions,the ratio of chemical N to organic N in 1 ∶ 1 is satisfactory for ensuring vegetable yield and keeping low annual emission of N2O.关键词
集约化菜地/有机无机肥料配施/N2O排放Key words
intensive vegetable field/combined application of organic and inorganic fertilizers/N2O emission引用本文复制引用
毕智超,张浩轩,房歌,郭澍,熊正琴..不同配比有机无机肥料对菜地N2O排放的影响[J].植物营养与肥料学报,2017,23(1):154-161,8.基金项目
国家科技支撑计划(2013BAD11B01) （2013BAD11B01）
公益性行业(农业)科研专项(201503106) （农业）
国家自然科学基金面上项目(41471192)资助. （41471192）
