TRIME-T3用于盐碱地土壤含水量测定的试验研究

发布时间：2018-06-17 11:11

本文选题：TDR + 盐碱地　；参考：《干旱区地理》2017年01期

【摘要】：以陕西省富平县卤泊滩盐碱地改良区为例,在其上游地段选取两块农田为研究对象,布置典型观测断面并埋设测管,运用TRIME-T3法和烘干法对观测断面土壤剖面含水量进行测定,并同步测定土壤含盐量。对两种方法测得的土壤含水量进行对比分析,研究土壤盐分对TRIME-T3法测定的土壤含水量影响以及该方法在盐碱地农田土壤剖面含水量测试中的应用。研究结果显示:(1)TRIME-T3法测量值较烘干法值偏大,但两者之间有较高的相关性,回归分析结果表明可以用y=0.866 3x+0.754 5的线性函数进行校正,校正后的TRIME-T3测量值中将有94.4%的值接近土壤含水量真实值。(2)通过对校正函数进行实例验证,结果表明TRIME-T3标定曲线值与烘干法测定值非常接近,绝对误差1 cm3·cm-3,相对误差在5%以下,表明TRIME-T3法通过一定的校正后可以很好地表达该盐碱地农田土壤剖面含水量信息。(3)通过对TRIME-T3测定的含水量与相应含盐量进行分析,发现两者之间的相关性并不显著,表明该方法可适用于盐碱地农田土壤剖面含水量测定。该研究结果可为类似地区盐碱地土壤剖面水分测定技术(TRIME-T3)的应用提供科学依据和理论参考。
[Abstract]:In this paper, two plots of farmland were selected as the research object in the area of saline and alkali soil improvement in Huping Beach, Fuping County, Shaanxi Province. Typical observation sections were arranged and pipes were buried. The soil water content of the observed section was measured by TRIME-T3 method and drying method. The salt content of soil was determined simultaneously. The effect of soil salinity on soil moisture measured by TRIME-T3 method and its application in soil water content measurement in saline and alkaline farmland were studied by comparing and analyzing the soil water content measured by two methods. The results show that the measured value of the TIME-T3 method is larger than that of the drying method, but there is a high correlation between them. The result of regression analysis shows that the linear function of yangzhou-0.866 3x 0.754 5 can be used to correct it. After correction, 94.4% of the measured values of TRIME-T3 will be close to the true value of soil moisture content. The results show that the calibration curve value of TRIME-T3 is very close to that measured by drying method. The absolute error is 1 cm3 cm-3, and the relative error is less than 5%. The results showed that TRIME-T3 method could well express the soil water content information of soil profile of saline and alkaline farmland after certain correction.) by analyzing the moisture content measured by TRIME-T3 and the corresponding salt content, it was found that the correlation between the water content and the corresponding salt content was not significant. The results show that this method can be applied to the determination of soil water content in soil profile of saline and alkaline farmland. The results of this study can provide scientific basis and theoretical reference for the application of soil profile moisture determination technique in saline and alkaline soils in similar areas.
【作者单位】：扬州大学水利与能源动力工程学院;南昌工程学院水利与生态工程学院;西安理工大学西北旱区生态水利工程国家重点实验室培育基地;
【基金】：国家自然科学基金资助项目(51279159) 江苏高校优势学科建设工程资助项目(PAPD)
【分类号】：S152.7

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