摘要
为探究不同施肥模式下菠萝(Ananas comosus)种植地土壤氧化亚氮(N2O)的排放特征,筛选出既高产又减少N2O排放的施肥方法。本试验以热带地区菠萝农田为研究对象,设置不施肥(CK)、常规施肥(NPK)、减量单施化肥(INF)、无机肥+有机肥配施(INF+M)、无机肥+有机肥+缓控肥配施(INF+M+S)等5个处理,利用静态暗箱−气相色谱法对菠萝整个生育期土壤的N2O排放特征进行监测,并分析不同施肥模式下土壤温度、土壤含水量、硝态氮和铵态氮对N2O排放的影响及菠萝产量间的差异。结果表明:INF+M+S,INF+M和INF处理下的菠萝产量比NPK处理的分别增加16.77%、6.66%和6.53%,且INF+M+S显著高于NPK。整个菠萝生育期,N2O累积排放量和平均通量表现为NPK>INF>INF+M>INF+M+S>CK,且处理间差异显著;N2O排放强度依次为NPK>INF>INF+M>INF+M+S>CK,处理间也表现出显著差异;同时,INF+M+S处理的排放系数也显著低于其他施肥处理;相关性分析发现,土壤硝态氮和铵态氮含量与N2O排放通量呈极显著正相关。INF+M+S处理能够显著提高菠萝产量,降低菠萝整个生育期农田N2O的排放量与排放强度,可作为菠萝较优的施肥模式。
An attempt was made to explore the N2O emission characteristics of pineapple(Ananas comosus)soil under different fertilizer treatments to screen out an optimum fertilizer application approach which reduces N2O emissions and gives high pineapple yield.A fertilizer application trial was arranged in a pineapple field in the tropical region,and five treatments were arranged in the trial:no fertilizer(CK),conventional fertilizer(NPK),single application of fertilizer at a reduced rate(INF),combined application of inorganic fertilizer+organic fertilizer(INF+M),combined application of inorganic fertilizer+organic fertilizer+slow-control fertilizer(INF+M+S).The soil N2O emissions were monitored by using static black box-gas chromatography,and the relationship of soil temperature,soil moisture,nitrate nitrogen and ammonium nitrogen with N2O emissions and pineapple yield was analyzed under different treatments.The results showed that the INF+M+S,INF+M and INF treatments increased pineapple yield by 16.77%,6.66%and 6.53%,respectively,when compared with the NPK treatment.During the whole pineapple growth stage,the N2O cumulative emission and average flux detected in the treatments were increased in the order of NPK>INF>INF+M>INF+M+S>CK and were significantly different between the treatments.The emission intensity was increased in the order of NPK>INF>INF+M>INF+M+S>CK and was significantly different between the treatments.The INF+M+S treatment had a significantly lower emission coefficient than all the other treatments.The soil N2O emission flux was significantly positively correlated with soil ammonium nitrogen content and soil nitrate nitrogen content.The INF+M+S treatment increased pineapple yield significantly and reduced the N2O emission in the pineapple field at the whole growth stage,and it can hence be used as an optimum approach for fertilizer application to pineapple.
作者
符春敏
尹黎燕
邓燕
兰超杰
韩忠钰
金鑫
李长江
黄家权
FU Chunmin;YIN Liyan;DENG Yan;LAN Chaojie;HAN Zhongyu;JIN Xin;LI Changjiang;HUANG Jiaquan(School of Life and Pharmaceutical Sciences,Hainan University,Haikou,Hainan 570228,China;Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources,College of Tropical Crops,Hainan University,Haikou,Hainan 570228,China)
出处
《热带生物学报》
2020年第3期331-340,共10页
Journal of Tropical Biology
基金
2019年海南省基础与应用基础研究计划(自然科学领域)高层次人才项目基金(2019RC108)
国家自然科学基金项目(31860130)
海南大学科研启动基金项目(KYQD(ZR)1850)。
关键词
菠萝
热带地区
施肥模式
氧化亚氮排放
产量
Ananas comosus(L.)Merr
tropical region
fertilizer regime
N2O emission
yield
