Abstract: 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.