In the rural reclamation area in the lower reaches of the Tarim River, the irrigation water is strictly controlled and the channels are uniformly drained. The irrigation period is short. Therefore, each irrigation must be quickly completed when the water comes from the channel. It cannot take too long and is a time-limited irrigation. The soil moisture detector was used to analyze the observed values ​​of the soil moisture detector by comparing the root irrigation with flood irrigation in the farmland area of ​​the lower reaches of the Tarim River.
The suitable soil moisture for jujube growth should be maintained at more than 75% of the saturated soil moisture content, and the average soil moisture content measured by soil moisture detector should be 37% to 45%. The minimum soil moisture standard for irrigation is not less than 68% of the saturated moisture content, ie not less than the minimum threshold of 33.6%.
The water content of the root irrigation was increased sharply. Within 10 hours after the irrigation, the root irrigation time was not less than 10 hours. After root irrigation, the maximum value of the soil moisture detector increased from 43.46% to 46.38%, with an average of 45.16%; the maximum value of the single value was 47.1% to 51.1%, and the maximum single value averaged 39.46%.
In the growing season of jujube tree, soil moisture should be maintained in a relatively balanced state. From June 1st to October 5th, a total of 5 irrigations were conducted. The soil moisture tester found that the total increase in soil moisture was 77.34% for irrigation, 15.5% for one irrigation, and 74.58% for soil moisture. This indicates that the soil moisture of the jujube tree in the growing season is surplus. According to the average increase rate of irrigation water (15.5%) and the average rate of soil moisture regression (0.69%), the average irrigation cycle of jujube tree was 22 days.
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