关键词：
沼液灌溉;CO2排放;N2O排放;DOC;产量
摘 要：
采用静态箱-气相色谱仪法,共设置不施肥灌溉清水CK、习惯施肥灌溉清水CF、不施肥灌溉一次2∶1(清水∶沼液)奶牛场沼液T1、不施肥灌溉两次2∶1奶牛场沼液T2、不施肥灌溉两次1∶1奶牛场沼液T3等5个处理。通过田间原位观测试验对不同比例、不同次数沼液灌溉对华北平原麦田土壤CO2、N2O排放及其相关土壤因子的影响进行研究。结果表明:小麦主要生育期内各处理CO2排放具有明显的季节变化趋势,变化范围为1.93~13.70kg/(hm2·d),分别在4个重要时期即返青期、拔节期、抽穗期、灌浆期出现了排放高峰。N2O变化范围为:-3.93~41.86g/(hm2·d),排放高峰仅出现在灌溉奶牛场沼液后的很短一段时间(7d)内,很快下降并维持在较低水平。整个观测期内与CK和CF处理相比,3种不同模式沼液灌溉都不会引起CO2累积排放量增加;与CF处理相比,3种不同模式沼液灌溉都不会引起N2O累积排放量增加。T3处理为较为合理的沼液灌溉模式,既能保证小麦产量,也不会引起CO2和N2O排放量的增加。3种不同模式沼液灌溉均显著(p<0.05)提高了冬小麦田土壤DOC含量,T3、T2、T1处理较CK处理分别提高了203.0%、114.9%、40.3%。在实验条件下,土壤的CO2排放量与土壤DOC含量显著相关;土壤的N2O排放量与土壤的NO-3-N含量、DOC含量极显著相关,与土壤WFPS显著相关。
译 名：
Effects of Irrigating Biogas Slurry on CO_2 and N_2O Emission and Soil Parameters in Winter-Wheat Field
作 者：
SHEN Shi-zhou;WANG Feng;XUE Chang-liang;ZHANG Ke-qiang;Agro-Environmental Protection Institute,Ministry of Agriculture;
关键词：
biogas slurry irrigation;;CO2 emissions;;N2O emissions;;DOC;;yield
摘 要：
In this research,Static-Gas Chamber method was used,and five treatments were set up,which were CK,no fertilization and water irrigation CF,conventional fertilization and water irrigation T1,no fertilization and 2:1biogas slurry irrigation,which was mixed with water and biogas slurry at 2∶1for one time T2,no fertilization and 2∶1biogas slurry irrigation for 2times,and T3 no fertilization and 1∶1biogas slurry irrigation for 2times,respectively.Based on in situ observation research,the influence of irrigation with biogas slurry of different proportions for different times on soil CO2 and N2O emission and related factors,was studied.The results showed that:During the main growth period of wheat,there was a significant climate trend of CO2 emission under different treatments range from1.93 to 13.70kg/(hm2·d),with emission peaks emerging at four important periods,which were returning green stage,elongation stage,heading stage,postulation period.N2 O emission range from-3.93 to 41.86g/(hm2·d)and the peaks only emerged in a short period(7d)after irrigation range from-3.93 to 41.86g/(hm2·d),then quickly decreased and stayed at a low level.During the monitoring period,compared with the CK and the CF processing,three different modes of biogas slurry irrigation will not cause accumulated CO2 emissions increase;Compared with the CF process,three different modes of biogas slurry irrigation will not cause accumulated N2 O emissions increase.T3 treatment is the reasonable mode of biogas slurry irrigation,the wheat production can be ensured and will not cause the CO2 and N2O emissions increase.Three different modes of biogas slurry irrigation increase the content of winter wheat field soil DOC significantly(p<0.05).Compared with the CK respectively,T3,T1,T2 treatments increased by 203.0%,114.9%,40.3%.Under the condition of this experiment,the soil CO2 emissions associated with soil DOC content significantly,soil N2 O emissions related to soil NO-3-N content,DOC content every significantly and associated with the soil WFPSsignificantly.
