某地国家储备林土壤含水量变化规律研究

以河南省某地2年生杜仲树为研究对象,在树盘式灌溉条件下,利用根系分布土层放置的土壤温湿度传感器和智能采集器对土壤体积含水量进行实时监测,分析土壤含水量在不同灌水定额条件下的动态变化规律,根据动态变化规律来确定相对应的灌水周期.试验结果表明:各个测点的土壤含水量在灌水后12h均高于田间持水量;灌水后10d各测点土壤体积含...

Study on the change law of soil water content in a national reserve forest

Taking the 2 year old Duzhong tree in Henan Province as the research object, the soil temperature and humidity sensor and the intelligent collector placed in the root distribution soil layer were used to monitor the soil volume water content in real time under the tree tray irrigation condition. The dynamic change law of soil moisture content under different irrigation quotas was analyzed, and the corresponding irrigation cycle was determined according to the dynamic change law. The test results showed that the soil water content of each measurement point was higher than the field water holding capacity 12 h after irrigation. The soil volumetric water content of each measurement point was maintained at more than 70% of the field water holding capacity 10 days after irrigation. The irrigation water volume was 60 L per tree per time, 80 L per tree per time, 100 L per tree per time, 120 L per tree per time, 140 L per tree per time, 160 L per tree per time, corresponding to irrigation cycles of 14 d, 16 d, 18 d, 22 d, 23 d, 24 d, respectively. The experiment results have important guiding significance for formulating irrigation schedules and designing economic and reasonable irrigation systems.