Drip irrigation in greenhouses has many advantages, such as reducing humidity, increasing ground temperature, saving water, saving labor, increasing efficiency, and increasing production. However, in the drip irrigation of greenhouses, there are often problems such as damage of the emitter, plugging of the drip holes, poor uniformity of the outlet water, and low flow rate. In order to avoid the above problems, users should pay attention to the following points: 1. Choosing the right drip irrigation machine: 1 Select the appropriate water pump by calculation or according to design requirements; design a reasonable water supply pipe diameter and pipe length through calculation to achieve higher uniformity; water supply pipe should be selected plastic with anti-aging properties Pipe. 2 The emitter is a key component. It is necessary to choose an emitter that is uniform in water, strong in anti-clogging ability, and easy to install and use. 8 The selected filter should be 120 days or 150 days, and it has the advantages of corrosion resistance and easy flushing. 2. Correct installation of drip irrigation machinery: (1) The installation of water supply pipelines should adopt a bidirectional water separation method and strive to balance the two sides. 2 In the installation process of the first hub, one pressure gauge and one valve must be installed before and after the filter. The purpose is to observe the pressure difference before and after the filter and to adjust the flow and pressure, and to facilitate the filter cleaning. 3. Use drip irrigation machinery correctly. 1 To control the system pressure, the system working pressure should be controlled within the specified standard range. 2 The filter is a key component to ensure the normal operation of the system. It should be cleaned frequently. If the filter is found to be damaged, it must be replaced in time. 3 The emitter is easy to damage, should be laid carefully, carefully managed, gently rolled up when not in use, and should not be pressed or dragged on the ground. 4 Strengthen management to prevent debris from entering the emitter or the water supply pipe. If any debris is found, the plug should be opened and flushed. When the temperature in the winter greenhouse is too low, appropriate measures must be taken to prevent the frozen plastic parts, the water supply pipes and the emitters. 6 When drip irrigation, slowly open the valve and gradually increase the flow to drain the air, reduce the impact pressure on the emitter, and extend its service life. There are three main types of Rice. Royal Basmati Rice,Nutritious Rice,Medium Grain Rice,Short Grain Rice Ningxia Saiwaixiang Food Co., Ltd. , https://www.nxswxfood.com
In
GB/T 1354-2009 "Rice National Standards", there are only three types of
rice: glutinous rice, glutinous rice and glutinous rice.
Pick rice three steps
Look
Packed
rice first look at whether the packaging is marked with QS mark,
product name, net content, production date and shelf life, quality
grade, product standard number and other information.
Look at the color and size of the rice grains in bulk to see if there are broken rice or yellow grains.
smell
Premium rice has a natural valley scent and no smell.
taste
New rice has a higher protein content and is harder than Chenmi.