长期定位施肥对潮土土壤黏土矿物影响的研究

发布时间：2018-04-26 01:01

本文选题：长期定位施肥 + 潮土　；参考：《华北农学报》2017年04期

【摘要】：为研究不同施肥对潮土土壤黏土矿物变化的影响。利用连续进行39年的长期定位施肥试验,选取1978,1984,1990,1996,2002,2008,2014年的土壤,采用X射线衍射法,分析了各施肥处理黏土矿物相对含量变化,结果表明:长期不同施肥可改变土壤黏土矿物的相对含量。蒙脱石的年际相对含量均高于CK,呈上升趋势,M_1N_2最显著(R~2=0.991 80),其次是M_2(R~2=0.952 86),伴随时间的推延,高岭石的相对含量M_2N_1降低最显著(R~2=0.993 10),其次为M_2N2(R~2=0.938 89)、M_1N_2(R~2=0.900 00),且所有处理的高岭石含量均低于CK。土壤中绿泥石相对含量,有机肥配施氮肥处理较CK有所降低,根据2014年数据可知,M_2N2降低最明显,降低5个百分点。单施氮肥处理中水云母相对含量随时间的推移呈下降趋势,且N2(R~2=0.948 03)低于N1(R~2=0.883 27),单施有机肥及有机肥配施氮肥水云母相对含量逐年提高,M_2N2最高(R~2=0.971 26),其次是M_1N_2(R~2=0.903 18)、M_2N_1(R~2=0.890 89),表明有机肥有利于水云母的生成。长期单施氮肥造成钾素缺失,水云母矿物层间的非交换性钾不断释放,形成蒙脱石-水云母混层的相对含量也随时间的推移呈上升趋势。
[Abstract]:In order to study the effect of different fertilization on clay mineral changes in soil. The relative content of clay minerals in each fertilization treatment was analyzed by X ray diffraction (XRD) in the soil of 1978 ~ 19841990 / 1996 ~ 2002N / 2008 and 2014, which was carried out for 39 years in succession. The results showed that long-term fertilization could change the relative content of clay minerals. The relative content of montmorillonite was higher than that of CK, and the relative content of montmorillonite was higher than that of CK. The relative content of montmorillonite was higher than that of CK, and the relative content of kaolinite was lower than that of CK. and the relative content of kaolinite in all treatments was lower than that of CK. in addition, the relative content of montmorillonite was higher than that of CK. The relative content of chlorite in soil, organic fertilizer combined with nitrogen fertilizer treatment was lower than CK. According to the data of 2014, the decrease of M2N2 was the most obvious, which decreased by 5 percentage points. The relative content of Muscovite in the treatment of single nitrogen fertilizer decreased with the passage of time. The relative content of water mica increased year by applying organic fertilizer and organic fertilizer in combination with nitrogen fertilizer. The highest value of M2N2 was 0.9971 26, followed by M_1N_2(R~2=0.903 18s. M2N1, R2N 1 and R2N 2 were 0.890 89, which indicated that organic fertilizer was beneficial to hydromica production. The lack of potassium and the release of non-exchangeable potassium between the layers of hydromica minerals resulted from the long-term application of nitrogen fertilizer alone, and the relative content of montmorillonite / hydromica mixed layer increased with the passage of time.
【作者单位】：青岛农业大学资源与环境学院;
【基金】：山东省现代农业产业技术体系建设经费(SDAIT-02-06) “十二五”农村领域国家科技计划课题(2013BAD07B00) 山东省科技重大专项(2015ZDXX0502B01)
【分类号】：S153

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