After irrigation, the rapid increase of soil moisture is short, about 10 hours; and the process of soil moisture retreat is long and slow, which takes more than a dozen days. The increment or degressive amplitude of soil moisture is described and described using the diurnal gradient of soil moisture. After the soil moisture tester found that the irrigation was stopped, the redistribution process of soil moisture was basically in a state of slow change, and the increase and decrease of soil moisture were not large, and the final trend was slow landing.
Root irrigation can directly irrigate water to a plant root soil layer of a certain depth (30 to 40 cm). The technical method is to install "in-line infiltration irrigation drippers" or "plugging-proof roots" at the outlet of the capillary drip of the ground. "Drip dripper", the water dripping from the capillary dripper directly into a certain depth of the soil layer, can effectively improve the efficiency of irrigation and fertilizer use, improve irrigation efficiency; root irrigation more than irrigation can reduce the evaporation loss of soil moisture.
Irrigation increases the soil moisture content. The maximum value detected by the soil moisture tester is the saturation state of the soil water content reached after the first irrigation (1st root irrigation), and the maximum average water content in 0-100cm soil is 43.46%; 4 On the 30th of the month, the range of soil moisture changed from -3.6% to 0.5%, and the trend of soil moisture changed basically steadily. In the case of a low base soil moisture content before irrigation, root irrigation has a greater effect on increasing soil moisture content.
In the case of a high base of soil moisture content, or in the absence of significant water shortage in the soil, irrigated, it has a limited effect on increasing soil moisture content. Therefore, in actual irrigation, the soil moisture tester can monitor the soil moisture content in real time, grasp the deficit status of the soil moisture, and timely and appropriate irrigation, improve irrigation efficiency, increase the effective utilization of irrigation water, and improve the irrigation of soil. The role of water in compensating losses has a very important significance.
Root irrigation can directly irrigate water to a plant root soil layer of a certain depth (30 to 40 cm). The technical method is to install "in-line infiltration irrigation drippers" or "plugging-proof roots" at the outlet of the capillary drip of the ground. "Drip dripper", the water dripping from the capillary dripper directly into a certain depth of the soil layer, can effectively improve the efficiency of irrigation and fertilizer use, improve irrigation efficiency; root irrigation more than irrigation can reduce the evaporation loss of soil moisture.
Irrigation increases the soil moisture content. The maximum value detected by the soil moisture tester is the saturation state of the soil water content reached after the first irrigation (1st root irrigation), and the maximum average water content in 0-100cm soil is 43.46%; 4 On the 30th of the month, the range of soil moisture changed from -3.6% to 0.5%, and the trend of soil moisture changed basically steadily. In the case of a low base soil moisture content before irrigation, root irrigation has a greater effect on increasing soil moisture content.
In the case of a high base of soil moisture content, or in the absence of significant water shortage in the soil, irrigated, it has a limited effect on increasing soil moisture content. Therefore, in actual irrigation, the soil moisture tester can monitor the soil moisture content in real time, grasp the deficit status of the soil moisture, and timely and appropriate irrigation, improve irrigation efficiency, increase the effective utilization of irrigation water, and improve the irrigation of soil. The role of water in compensating losses has a very important significance.
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