Water-fertilizer recycling system and method

Abstract

The invention provides a water-fertilizer recycling system and method and relates to the technical field of desert planting. The system comprises a tillage foundation pit, a diversion groove and a water return tank, the diversion groove is formed on one side of the tillage foundation pit and communicated with the tillage foundation pit in a penetrative manner, the water return tank is communicatedwith the diversion groove, the undersurface of the tillage foundation pit form an engineering foundation undersurface, first impermeable geotechnical cloth is paved on the engineering foundation undersurface, a water-permeable planting layer is filled on the first impermeable geotechnical cloth and used for planting crops and enabling water-fertilizer to downwards permeate to the surface of the first impermeable geotechnical cloth, and one side, close to the diversion groove, of the engineering foundation undersurface is lower than one side, away from of the diversion groove, of the same to enable the engineering foundation undersurface to be arranged downwards in a manner of inclining to the diversion groove. Compared with the prior art, the system has the advantages that desert facilityagriculture water-fertilizer recycling technology on the basis of conventional planting technology can be provided, and water-fertilizer utilization efficiency is improved substantially.

Description

technical field [0001] The invention relates to the technical field of desert planting, in particular to a water and fertilizer recycling system and a water and fertilizer recycling method. Background technique [0002] Due to the continuous and rapid population growth and the reduction of per capita arable land, for the sake of economic development and social stability, my country's desert areas have begun to build large-scale greenhouses in desert areas. Greenhouses are built on the flattened sand dunes around the oasis, and the cultivation substrate is quicksand with soil clay content less than 5%. Quicksand cannot provide the perfect function of normal soil, so the phenomenon of nutritional barriers to greenhouse vegetable growth caused by quicksand soil matrix is ​​very common. . Sandy soil has poor water and fertilizer storage capacity, water leakage and fertilizer leakage. Vegetables in production are easily affected by water and fertilizer stress and affect their gr...

AI Technical Summary

Problems solved by technology

However, this method faces the problems of difficult source of high-quality soil, large engineering volume, high transportation and labor costs

There is also the method of using anti-seepage sand, that is, laying a layer of anti-seepage sand under the pure sand cultivation layer, using anti-seepage sand to prevent the infiltration of water, thereby improving the efficiency of water and fertilizer use, but this method faces the problem of anti-seepage The problems of high sand cost, difficult construction and unsatisfactory effect

Although the water and fertilizer integrated drip irrigation measures can improve the utilization efficiency of water and fertilizer, the improvement range is relatively limited, especially the irrigation water with high salinity is easy to cause the problem of salt accumulation in cultivation under the condition of drip irrigation, so the water and fertilizer management in production is faced with the problem of reducing a single time. The amount of irrigation can improve the utilization rate of water and fertilizer, but there will be risks of salt accumulation in the cultivated layer soil and the risk of uneven irrigation. Increasing the amount of single irrigation will inevitably cause a lot of waste of water and fertilizer resources

Balance is difficult to grasp

Water and fertilizer recycling mode is commonly used in soilless substrate cultivation facility agriculture. This technology mode has huge investment in environmental control facilities and water and fertilizer automation control equipment, high water quality requirements, and requires reverse osmosis water purification equipment. The operating cost is high, and the operator The technical requirements are high, and it depends heavily on the technical level of the operator. It needs to rely on the timely diagnosis of PH, electrical conductivity, etc. to regulate the amount of irrigation water and the nutrients supplied. Under the current economic level of desert facility agricultural areas and the quality of employees, there is no Implementation possibility

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