绿肥对华北潮土土壤可溶性有机物的影响

发布时间：2018-02-01 10:17

本文关键词： 华北潮土绿肥可溶性有机物紫外-可见光谱参数　出处：《光谱学与光谱分析》2017年01期 　论文类型：期刊论文

【摘要】：在华北潮土上种植不同绿肥,于绿肥翻压前原位采集其地上部及土壤样品,进行56d的绿肥翻压模拟试验。设毛叶苕子(Vicia villosa Roth.)、二月兰(Orychophragmus Violaceus L.)、黑麦(Secale cereale L.)三个绿肥处理和无绿肥对照处理,分析培养过程中土壤可溶性有机物(DOM)组分及其紫外-可见光谱参数的变化,以探究绿肥对土壤DOM的影响。种植和翻压绿肥增加土壤可溶性有机碳(DOC)、总有机酸碳(TOAs)和总碳水化合物碳(TCs)含量,三者的变化趋势一致,各处理均在培养第1d上升至峰值后迅速下降。毛叶苕子提高DOC和TOAs的效果最好,最高比对照增加114.01%(培养第1d)和109.10%(培养第14d)。黑麦提高TCs的效果最好,最高比对照增加323.18%(培养第42d)。种植和翻压绿肥增加土壤可溶性有机氮(DON)含量,与DOC变化趋势不同,各处理在培养第1d上升后迅速下降一段时间后又迅速上升。毛叶苕子提高DON的效果最好,最高比对照增加305.83%(培养第42d)。绿肥增加了SUVA_(254),SUVA_(260),SUVA_(272),SUVA_(280),SAUC_(240-400),降低了A_(250)/A_(365)和A_(240)/A_(420)。紫外-可见光谱参数的主成分分析显示SUVA_(254),SUVA_(260),SUVA_(272),SUVA_(280)间有很高正相关性,A_(250)/A_(365)和A_(240)/A_(420)间亦有很高正相关性,SAUC_(240-400)是这些参数中表征DOM性质的关键因子。综上结果表明,种植翻压绿肥增加了土壤DOM含量,提高了土壤DOM的芳香性、疏水性、腐殖化程度、平均分子量,增加了土壤DOM的稳定性。
[Abstract]:Different green manure was planted on the North China tidal soil, and the above ground and soil samples were collected in situ before the green manure was rolled over. The experiment was carried out for 56 days. Vicia villosa Roth. was set up. In February, Orychophragmus Violaceus L. and rye cereale L.) three green manure treatments and no green manure control treatments. The changes of soil soluble organic matter (DOM) components and UV-Vis spectral parameters during culture were analyzed. In order to explore the effect of green manure on soil DOM, planting and rolling green manure increased the contents of soluble organic carbon (DOM), total organic acid (TOC) and total carbohydrate (TCS) in soil. The change trend of the three treatments was the same, all treatments increased to the peak value at the first day of culture, and the effect of hairy vetch on DOC and TOAs was the best. The maximum increase of 114.01 and 109.10 were 114.01 and 109.10, respectively. The effect of rye on TCs was the best. The highest content of soil soluble organic nitrogen (DON) was increased by 323.18% than that of the control (cultivation of 42nd day), and the change trend of soil soluble organic nitrogen was different from that of DOC. The DON of hairy vetch was the best in the first day of culture, and then decreased rapidly for a period of time after rising on the first day of culture. The maximum was 305.83 compared with the control. SUVAART 280 SAUCART 240-400). The number of cases reduced by 250 / A / A / A / T / 365) and the number of As / A / A / T / A / A / T / A / A / A / A / A / A / A / A / V / A / A / A / A / A / V / A / A / A / A / A / A / A / A. There is a high positive correlation between the two groups. There is also a high positive correlation between AIM 250 / AIM / AIM / AIM / A20). SAUCSCALL 240-400) is the key factor to characterize the properties of DOM in these parameters. The results show that green manure can increase the content of DOM in soil and increase the aromaticity of DOM in soil. Hydrophobicity, humification degree and average molecular weight increased the stability of soil DOM.
【作者单位】：中国农业科学院农业资源与农业区划研究所/农业部植物营养与肥料重点实验室;中国农业科学院研究生院;华中农业大学资源与环境学院;青海大学青海省农林科学院土壤肥料研究所;Faculty
【基金】：公益性行业(农业)科研专项(201103005) 中国农业科学院科技创新工程项目资助
【分类号】：S142;S153
【正文快照】： 1.中国农业科学院农业资源与农业区划研究所/农业部植物营养与肥料重点实验室,北京1000812.中国农业科学院研究生院,北京1000813.华中农业大学资源与环境学院,湖北武汉4300704.青海大学青海省农林科学院土壤肥料研究所,青海西宁8100165.Faculty of Agriculture,Kagoshima Univ

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