Effects of Organic Mulches on Urban Soil Temperature and Moisture
As an ecological environmental protection covering, “waste and treasureâ€, organic covering has very good ecological benefits. The soil moisture and soil temperature changes under different cover treatments. The soil temperature and soil moisture are measured by a multi-point soil temperature and humidity recorder to discuss how to scientifically manage the function of recovering soil ecosystems and promote urban trees. , the normal growth of flowers. Among them, we found in the experiment that organic coverings have a significant effect on soil moisture content and soil temperature, and through 3 to 12 months, 0-10 cm, 10-20 cm, 20-30 cm, and 30-40 cm in different soil layers and moisture. Continuous observation of temperature changes can initially lead to the following conclusions:
(1) The seasonal variation trend of soil water content of the three covered treatments was consistent. The soil water content fluctuates most in the 0-10cm soil layer. With the increase of soil depth, the fluctuation is more and more weak. (2) The treatment of organic matter covering 3cm was higher than that of the blank control in all four soil layers, while the increase amount was the most in 10-20cm and 20-30cm soil layers; the organic material covering 5cm was only significantly higher than the blank in 0-10cm soil layer. Control. (3) The seasonal trends of soil temperature in different treatments were consistent. Treatments covering organic matter of 3 cm and 5 cm decreased soil temperature by 2.0° C. and 0.9° C. in the hot summer and 0.9° C. and 1.4° C. in the cold winter season relative to the blank control. (4) The diurnal variation of 8:00-18:00 soil temperature in different treatments was unimodal, with the highest value at around 13:00 and the lowest at around 8:00. The daily temperature range of the soil covered by the treatment was significantly smaller than that of the blank control. The coverage of 3 cm in the spring, autumn, and winter was less than the treatment of organic matter covering 5 cm.
Through the use of soil temperature and humidity recorders, we learned that: Covering organic matter increases the soil moisture content, and at the same time has a good regulation of temperature, but in laying applications should pay attention to laying thickness, not thicker the better. The effect of organic covering on soil and trees is a long-term process. We must pay constant attention to changes in soil moisture and temperature.
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