目录
摘要 I
关键词 I
Abstract I
引言
引言
1 材料与方法 1
1.1 供试土壤与材料 1
1.2 试验设计 1
1.2.1试验处理 1
1.2.2试验重复 1
1.2.3试验步骤 1
1.3 CO2、N2O的采集与测定 2
1.4 数据处理 2
2 结果与讨论 2
2.1 CO2与N2O排放速率的时间变化动态 2
2.1.1 CO2排放速率的时间变化动态 2
2.1.2 N2O排放速率的时间变化动态 3
2.2 重金属施用对CO2与N2O排放总量的影响 4
2.2.1 重金属施用对CO2排放总量的影响 4
2.2.2 重金属施用对N2O排放总量的影响 6
2.3 讨论与小结 7
2.3.1 猪粪中重金属对土壤CO2排放的影响 7
2.3.2 猪粪中重金属对土壤N2O排放的影响 8
3 结论 8
4 研究展望 9
致谢 9
参考文献： 10
畜禽粪便中典型重金属对农田土壤CO2、N2O排放的影响
摘要
近年来，由于养殖行业的规模化发展，产生了大量重金属高残留的畜禽粪便，这些粪便施用于农田后，使得农田土壤遭受重金属污染。畜禽粪便农用是农田温室气体主要排放源之一，研究重金属对农田土壤温室气体排放的影响，可为正确评价畜禽粪便施用环境效应及合理估算农田土壤温室气体排放提供科学依据。
本文以重金属铜、锌（Cu、Zn）作为研究对象，通过室内模拟水田试验，对比分析了不同浓度Cu（100、1500mg/kg）、Zn（500、5000mg/kg）单独及复合污染在不同肥源猪粪（M）和尿素（U）同步输入条件下对模拟水田土壤（培养周期28天）中CO2、N2O排放速率与排放总量的影响。结果表明，模拟淹水环境下无论配施猪粪还是尿素，加入的重金属（Cu、Zn）对土壤CO2的排放速率都有显著抑制作用（P<0.05），且重金属浓度越高抑制作用越 *51今日免费论文网|www.51jrft.com +Q: @351916072@ 
强。整个培养观测期，在添加相同重金属处理组中，配施猪粪的各处理土壤的CO2累积排放量均显著低于配施尿素的各处理土壤（P<0.05）。与施加同种肥源（尿素、粪便）的对照处理相比，各浓度重金属（Cu、Zn）处理对CO2累积排放均有显著抑制作用（P<0.05）。此外，单一高浓度重金属（Cu、Zn）对CO2累积排放的抑制作用较单一低浓度重金属更强。
配施尿素的处理在整个培养观测期内，各重金属处理对土壤N2O排放速率均起显著抑制作用（P<0.05），且重金属浓度越高抑制作用越强。对于配施猪粪的处理，各浓度重金属对N2O排放速率均有显著促进作用（P<0.05）。对于土壤N2O的排放总量，在相同浓度重金属处理组中，除重金属无抗生素仅尿素处理（UCK）与无重金属无抗生素残留的有机猪粪处理（MCK）外，配施猪粪的各处理土壤的N2O排放总量均显著高于配施尿素的各处理土壤（P<0.05）。配施尿素的处理组中，存在重金属添加的处理组对N2O累积排放量存在显著抑制作用（P<0.05）。在配施猪粪的处理组中，除MCu0Zn5000处理外，存在重金属添加的处理组对N2O累积排放量存在显著促进作用（P<0.05）。
EFFECTS OF TYPICAL HEAVY METALS IN LIVESTOCK MANURE ON CO2 AND N2O EMISSIONS FROM FARMLAND SOIL
ABSTRACT
In recent years, due to the largescale development of the breeding industry, a large number of livestock manure with high heavy metal residue has been produced. When these manure are applied to farmland, the farmland soil is polluted by heavy metals. Livestock manure is one of the main emission sources of greenhouse gases in farmland. The study on the impact of heavy metals on greenhouse gas emissions in farmland soil can provide scientific basis for the correct evaluation of environmental effects of livestock manure application and the reasonable estimation of greenhouse gas emissions in farmland soil.
In this paper, the heavy metals Cu, Zn were used as the research object. Through the indoor simulated paddy field test, the effects of different concentrations of Cu (100, 1500mg/kg), Zn (500, 5000mg/kg) single and compound pollution on CO2 in the simulated paddy field soil (28 days of incubation period) under the condition of simultaneous input of pig manure (m) and urea (U) from different fertilizer sources were analyzed , N2O emission rate and total emission. The experimental results showed the addition of heavy metals (Cu, Zn) significantly inhibited the emission rate of soil CO2 (P<0.05), and the higher the concentration of heavy metals, the stronger the inhibition. During the whole incubation period, for the same heavy metal treatment, the cumulative emission of CO2 in the soil treated with pig manure was significantly lower than that of the soil treated with urea (P<0.05). Compared with the control treatment with the same source of fertilizer (pig manure or urea), the treatment with different concentrations of heavy metals (Cu, Zn) significantly inhibited the cumulative emission of CO2 (P<0.05). In addition, the inhibition effect of single high concentration heavy metals (Cu, Zn) on the cumulative emission of CO2 is stronger than that of single low concentration heavy metals.

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