生态环境学报Issue(8)：1286-1291,6.
施肥对不同肥力春玉米田土壤溶解性有机质的影响
Effect of Fertilization on Soil Dissolved Organic Matter under Different Yield Levels of Spring Corn
摘要
Abstract
This article investigated the effects of fertilization on dissolved organic matter (DOM), dissolved organic carbon (DOC), dissolved organic nitrogen (DON) and dissolved organic phosphorus (DOP) of the spring corn soil from Liaohe Irrigation with three-dimensional excitation-emission matrix spectroscopy. Through three years field experiment, the soil fertility effects of soil DOM and its components were analyzed. The experimental results indicated that the average ∑Fex/em of DOM, DOC, DON and DOP in fertilizing soil increased by1.08%, 9.36%, -3.39% and -7.54%, respectively. According to the high yielding field, middle yielding field and low yielding field, the increased∑Fex/em of DOM were 2.84%、3.56%and-1.52%, that of DOC were 20.43%、16.43% and-29.11%, that of DON were -20.63%、6.97% and-8.41%, and that of DOP were -22.87%、10.30% and 4.15%. The increasing of w (DOM) mainly occurred in middle yielding field soil. The increasing w (DOC) mainly occurred in middle plow ground floor (20~40 cm depth) soil of middle yielding field and in the surface layer (0~10 cm depth) and the plow layer (10~20 cm depth) soil of high yielding field. That of w (DOP) mainly occurred in the plow layer of middle yielding field and the surface layer of low yielding field. That of w (DON) mainly occurred in the plow layer of middle yielding field. By fertilizing treatment,in low yielding field soil, the fluorescence index (FI) was increased and the humification index (HIX) was decreased, in high yielding field soil the FI was decreased and HIX was increased. The content of DOM was significantly increased in the soil of middle yielding field, but it decreased in low and high yielding fields by fertilizing treatment. Although the DOM content in fertilizing soil increased in middle plow ground floor (10~20 cm depth), it decreased in middle plow ground floor (20~40 cm depth). The fertilizing treatment increased the percentage of terrigenous DOM in high-yielding field and the percentage of biological source DOM in low-yielding field. The fertilizing treatment mainly increased the contents of DOM in plow layer (10~20 cm depth) soil, and depleted the DOM in plow ground floor (20~40 cm depth) soil. The fertilizing treatment promoted the percentage of terrigenous DOM in high yielding field and the percentage of biological source DOM in low yielding field, and reduced the humification degree of DOM in middle and low yielding field soil. The fertilizing treatment is not only an important source of soil DOM, and also the depletion of soil DOM was promoted by influencing the activity of microbe and root. The impact of DOM on soil fertilizing treatment is different due to the differences in soil texture. DOM fluorescence intensity and yield and soil available nutrients were significantly correlated. DOM fluorescence intensity has the indicative effect on soil fertilization.关键词
施肥/土壤/溶解性有机质/产量/玉米Key words
the fertilizing treatment/soil/dissolved organic matter (DOM)/yield/corn分类
农业科技引用本文复制引用
赵海超,刘景辉,赵宝平,张星杰..施肥对不同肥力春玉米田土壤溶解性有机质的影响[J].生态环境学报,2014,(8):1286-1291,6.基金项目
国家公益性行业（农业）科研专项经费资助项目（201303126）；河北北方学院青年基金项目 （）
