Trace irrigation technology is expected to replace drip irrigation

Not long ago, the team of Zhu Xi, director of the Trace Irrigation Research Center of Huazhong University of Science and Technology, successfully developed trace irrigation (referred to as “mark irrigation” technology for more than 10 years, breaking the traditional irrigation method of passive hydration of crops, and changing the water by the crops themselves. . More than five years of field application trials have shown that this technology can save about 50% of water than the current best drip irrigation technology . It is expected to replace drip irrigation in the future and be used in a wide range of areas where drip irrigation is not available.

According to reports, China's existing water-saving irrigation methods include channel anti-seepage, sprinkler irrigation, micro-sprinkler irrigation, infiltration irrigation and drip irrigation, all of which are artificially controlled timing and irrigation, and are passive irrigation modes. The core water-saving component of the trace irrigation technology - the trace irrigation control head, consists of a capillary bundle with good water conductivity and a trace irrigation membrane with filtering function. The water control head is buried near the root of the crop, and the change of soil water potential is perceived as a plant. Real-time water supply. The double structure of the trace film and the capillary bundle in the water control head prevents the capillary bundle from being clogged with impurities, and ensures long-term stable operation of the system.

According to Zhu Xi, the trace irrigation relies on the capillary force to automatically adjust the water supply. It only wets the soil around the roots of the crop, so that the soil moisture content around the crop roots has been relatively stable, reducing the surface evaporation and deep underground leakage, and improving the moisture. The utilization rate reduces the water consumption intensity of the crop, so that the trace irrigation has the outstanding advantages of significant water saving effect, stable crop yield, and remarkable water use efficiency.

Recently, the Beijing Municipal Agricultural Commission organized experts from China Agricultural University, China Institute of Water Resources and Hydropower Research and other units to identify the trace irrigation technology, and concluded that it has reached the international leading level in terms of water saving efficiency, anti-blocking and no power anti-blocking. .

In addition, the trace irrigation technology is also an effective solution to desertification. The trace irrigation technology can supply water to the fertilizer in a timely, appropriate, uniform and slow manner according to the water consumption rule of the plant. There is no evaporation or leakage loss, and the root layer soil of the plant can be maintained in the optimal moisture, ventilation and nutrient state for a long time, which is particularly suitable. Used in an environment where plants cannot be cultivated in the past.

 

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