毛乌素沙地玉米不同种植年限砒砂岩与沙复配土壤有机质与全氮的关系
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S153.6

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陕西省土地整治重点实验室开放基金项目“不同未利用地有机重构土体微形态特征以及质量演变规律”(2018-JC15),“毛乌素沙地砒砂岩与沙复配土的团聚作用及稳定性机理研究”(2018-JC18)


Relationship Between Soil Organic Matter and Total Nitrogen in Compound Soil of Arsenic Sandstone and Sand with Number of Maize Cultivation Years in Mu Us Sand Land
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    [目的]研究毛乌素沙地不同种植年限下不同比例砒砂岩与沙复配土壤碳氮变化特征,分析新造复配成土结构能否持续稳定发育。[方法]根据2013-2016年田间小区试验数据,对不同种植年限下3种比例砒砂岩与沙复配土壤有机质和全氮时空变化特征及两者间的关系进行研究。[结果]①不同比例复配土壤有机质和全氮含量均随着作物种植年限的增加而呈现稳定上升趋势;②4 a间3种复配土壤有机质和全氮含量均表现为:1:1 > 1:2 > 1:5,各自相对于2013年变化差异极显著(p<0.01);③不同种植年限下3种比例复配土壤有机质与全氮均呈现显著正相关,相关系数分别为0.860,0.891 7,0.737 6。[结论]复配比例和种植年限是影响新造土壤有机质和全氮含量的重要因子。

    Abstract:

    [Objective] The purposes of this paper are to evaluate the characteristics of carbon and nitrogen in soils with different proportion of arsenic sandstone and sand under different cultivation years in Mu Us sand land, and to determine whether the newly-formed soil structure can develop continuously and steadily.[Methods] Based on the data of field plots from 2013 to 2016, the temporal and spatial variation characteristics of soil organic matter and total nitrogen and the relationship between the three proportions of sandstone and sand in different planting years were studied.[Results] ① The soil organic matter and total nitrogen content of different proportions showed a steady upward trend with the number of crop cultivation years; ② In the four years, the soil organic matter and total nitrogen content of the three compound soils showed 1:1 > 1:2 > 1:5, and the difference was significantly different from that in 2013(p < 0.01). ③ There were significant positive correlations between soil organic matter and total nitrogen in the three proportions under different planting years. The correlation coefficients were 0.86, 0.89 and 0.74.[Conclusion] Proportions and cultivation years are important factors affecting the contents of organic matter and total nitrogen in newly constructed soil.

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张海欧,王欢元,孙婴婴.毛乌素沙地玉米不同种植年限砒砂岩与沙复配土壤有机质与全氮的关系[J].水土保持通报,2019,39(2):242-245,252

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  • 收稿日期:2018-09-27
  • 最后修改日期:2018-10-24
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  • 在线发布日期: 2019-05-10
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