河套永济灌域土壤酸碱性与养分元素的关系

发布时间：2018-06-17 04:22

本文选题：永济灌域 + 土壤pH值　；参考：《中国沙漠》2017年04期

【摘要】：为了探讨干旱区灌区不同土地利用方式下盐碱化土壤剖面pH值与土壤水分和养分之间的关系,测定河套永济灌域荒地、林地、农田3种土地利用方式下0~20、20~40、40~60、60~80、80~100cm剖面土壤pH值、含水率(SMC)、有机质(OM)、总氮(TN)、Zn、Cu的含量。结果表明:土壤pH值平均值为9.13;土壤含水率2.96%~31.35%;土壤OM、TN含量平均值分别为11.30、0.49g·kg~(-1);微量营养元素Zn、Cu平均值分别为107.20、32.78mg·kg~(-1),是相应背景值的1.9、1.7倍;3种土地利用方式下,土壤pH值差异性极显著(P0.001),高低顺序为荒地农田林地,在垂直剖面含量差异并不显著(P0.05);3种土地利用方式下,土壤pH值主要受TN含量的影响,回归方程为Y_(pH)=9.336-0.409 X_(TN)(P=0.001);表层(0~40cm)土壤pH值在一定程度上受Cu含量的影响,回归方程为Y_(pH)=0.018 X_(Cu)+8.523(P=0.003)。在河套永济灌域,一方面土壤碱化会导致土壤养分含量的贫瘠,另一方面施肥等农业活动在一定程度上降低了土壤表层碱性,同时造成微量元素的累积,加重土壤碱性的作用也非常显著,因此在增加农业投入的同时应合理科学地施用农药化肥。
[Abstract]:In order to study the relationship between pH value of salinized soil profile and soil moisture and nutrients under different land use patterns in irrigated area in arid area, the soil pH values of 0 ~ (20) 20 ~ (20) ~ (20) ~ (20) ~ (-) ~ (60) ~ (60) ~ (60) ~ (60) ~ (60) ~ (60) ~ (60) ~ (80) ~ (80) ~ (80) ~ (80) ~ (-1) ~ (-1) soil pH value in the irrigated area of Yongji irrigated area of Hetao were determined. Water content of SMC, organic matter of OMN, total nitrogen of TNT, Zn, Cu. The results showed that the average value of soil pH value was 9.13; the soil moisture content was 2.96 ~ 31.35; the average content of OMTN was 11.30 ~ 0.49 g / kg ~ (-1); the average value of Zn ~ (+) Cu was 107.20 ~ 32.78 mg 路kg ~ (-1) 路kg ~ (-1) ~ (-1), which was 1.91.7 times of the corresponding background value. The difference of soil pH value was extremely significant (P 0.001), and the order of soil pH value was wasteland farmland and woodland. Under the three land use patterns, the soil pH value was mainly affected by TN content under the three land use patterns, the vertical profile content difference was not significant, and the soil pH value was mainly affected by TN content. The regression equation is as follows: the pH value of the soil is 9.336-0.409 X-1, and the pH value of the topsoil is affected by Cu content to some extent, and the regression equation is that the pH value of the soil is 0.018 X-1 / Cu2) 8.523 ~ (2 +) P ~ (2 +) ~ (0.003) ~ (3) ~ (3) ~ (3). In Hetao Yongji Irrigation area, on the one hand, soil alkalization will lead to poor soil nutrient content, on the other hand, fertilization and other agricultural activities can reduce the soil surface alkalinity to a certain extent, and at the same time cause the accumulation of trace elements. The effect of increasing soil alkalinity is also very significant, so it is necessary to apply pesticide and chemical fertilizer rationally and scientifically while increasing agricultural input.
【作者单位】：江苏省农业科学院农业资源与环境研究所/省部共建国家重点实验室培养基地-江苏省食品质量安全重点实验室;中国科学院寒区旱区环境与工程研究所;
【基金】：江苏省农业科技自主创新项目[CX(16)1051] 江苏省农业科学院科研基金项目(027126111637) 内蒙古自治区科技重大专项(Y439K71001)
【分类号】：S153

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