商丘农田土壤水分测定探头埋设位置研究

利用在商丘野外生态试验站定点埋设的SWR-2型土壤水分测定探头采集的数据,通过主成分分析和因子分析,对玉米试验区不同土层深度土壤水分试验数据进行了相关分析和检验,研究了农田中不同深度层土壤水分的相互关系,结果表明,地表下30 cm土层与20 cm、40 cm、50 cm处土壤体积含水率线性相关;主要根系区70 cm土层与60 cm、80 cm9、0 cm处土壤体积含水率线性相关;130 cm、140 cm、150 cm土层之间同样存在着线性相关,初步得出本地区土壤水分测定探头合适埋设位置是地表下10 cm、30 cm7、0 cm1、00 cm、140 cm 5个深度。

Study on the Soil Moisture Probe Laying Place of Farmland in Shangqiu District of Henan Province

By using the collecting data from the SWR-2 type soil moisture measuring probe,which is laid at fixed point of Shangqiu field ecological experiment station,test and correlation analysis of the experiment data of soil moisture in different soil layers of maize experimental plot are performed,and the relationship among soil moisture in different soil layers has been studied through the principle component analysis and factor analysis.The results show that the volumetric water content in 30 cm soil layer was linear correlation with that in 20 cm,40cm and 50cm,the volumetric water content in 70 cm soil layer of main root zone was linear correlation with that in 60cm,80 cm and 90 cm,the volumetric water content in 140 cm soil layer was linear correlation with that in 130 cm and150 cm,too.At last,it is concluded preliminarily that the suitable laying place for soil moisture probe is at the depth of 10 cm,30 cm,70 cm,100 cm and 140 cm under the surface in this area.