Trickle irrigation oxygenation method and trickle irrigation oxygenation device

Abstract

The invention relates to a trickle irrigation oxygenation method and a trickle irrigation oxygenation device. The trickle irrigation oxygenation device is characterized by comprising a bucket, an oxygenation barrel, a trickle irrigation pipe network and a trickle irrigation oxygenation device of a linkage device. The bucket is connected with a water source through a water pump, the oxygenation barrel is connected with oxygenous stock solution through a pipeline, the bucket and the oxygenation barrel are connected to the trickle irrigation pipe network, a connecting rod of the linkage device is arranged in the oxygenation barrel, one end of a floating ball rod of the linkage device is arranged in the bucket, the other end of the floating ball rod of the linkage device is sleeved on the connecting rod through a sliding block, and screws controlling relative sliding of the sliding block and the connecting rod are arranged on the sliding block. When irrigation is performed for the first time after crop seedlings are transplanted to a greenhouse, irrigation treatment is performed in an earth surface mode; when crops are irrigated once again, fist ridging treatment is performed to the crops and a trickle irrigation pipe, the trickle irrigation method that the trickle irrigation pipe of the trickle irrigation pipe network is located underground is adopted, and simultaneously the screws arranged between the sliding block and the connecting rod are opened in a staging mode according to total irrigation amount so as to perform irrigation oxygenation treatment to a crop area; and repeated trickle irrigation oxygenation is performed until the crops are mature according to growing conditions of the crops. The trickle irrigation oxygenation method and the trickle irrigation oxygenation device can be widely applied to the trickle irrigation oxygenation process of the greenhouse crops.

Description

technical field [0001] The invention relates to an irrigation method and device, in particular to a drip irrigation and oxygenation method and device suitable for greenhouse crops in saline-alkali areas. Background technique [0002] The optimal environment for crop growth must be able to provide sufficient CO for photosynthesis and respiration of the crop 2 (carbon dioxide) and O 2 (oxygen). Plant roots need to consume a lot of O when respiration 2 , if O 2 Insufficient supply will affect the growth of crop roots and soil respiration, reduce the absorption of water and nutrients by crops and the transmission of nutrients to the canopy, O 2 Severe deficiencies can cause crops to suffocate and die. o 2 Diffusion rate in water is very slow, usually, O in soil 2 Reserves can meet the needs of crop root respiration, but when crops are irrigated, water intrusion not only reduces the O in soil porosity 2 reserves, hindering the exchange of gas in the soil with the atmosphe...

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Problems solved by technology

[0003] The field air injector in the prior art utilizes the Venturi principle to divert the O in the air 2 After adding to the irrigation water flow, the O 2 Transported to the root zone of the crop, although the air injector adds oxygen to the root zone of the crop to greatly explore the potential of increasing crop production, but there are also the following shortcomings: 1. The operation is unstable, and the air injector operates according to the Venturi principle, that is, it is controlled by a valve The pressure at the inlet and outlet of the injector creates a pressure difference on both sides, thereby controlling the amount of air entering the irrigation water. The air injector is installed behind the water pump. When the water flow rate is unstable, the pressure on both sides of the injector will inevitably change. The accuracy of the pressure is adjusted through the valve. It is also relatively low, and the unstable pressure is difficult to ensure the stability of the air concentration in the irrigation water; secondly, the gas in the pressure pipeline will also cause the instability of the system operation, mainly refers to: ① due to the gas in the water pipeline , the water resistance increases, and when it is serious, it will form an "air blockage" and the flow rate will not reach the design value; Affected by the water flow rate, the pressure difference between the two ends of the air bag will change, which will cause the pressure in the pipeline to rise and fall sharply, and in severe cases, it will cause water hammer to cause the pipe to burst

2. The scope of use is limited and consumes a lot of energy. Since the air injector directly adds air to the irrigation water, the solubility of the air in the water is small, and the air is easy to escape from the irrigation point during surface irrigation. Therefore, it is only suitable for underground drip irrigation, and the injector flows through the water The force loss is large. When the air is sucked in, a certain working pressure difference needs to be maintained on both sides of the inlet and outlet, and the pressure loss is relatively large, resulting in large energy consumption.

3. The cost is high. Firstly, the input cost is high. The price of imported air injectors is about 5,000 yuan. The one-time investment is too high, and it is difficult for ordinary farmers to bear. Secondly, the operation and maintenance costs are high. pressure difference, high energy consumption, and high operating costs

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