1. Reasonable irrigation
After the rice is fully spiked to the filling stage, it should be irrigated in shallow water to increase the temperature and promote early maturity. It can generally keep the water layer 4-6 cm. During the milk maturity period to the yellow maturity period, as the temperature begins to gradually decrease, in order to increase the ground temperature, intermittent irrigation measures should be taken, that is, the water layer reaches 2-3 cm, and then let it dry naturally, and then irrigate when there is no water. In this way, it can increase soil aeration, increase rice root vitality, increase ground temperature, can maintain roots and maintain strong leaves, extend the life of the upper leaves, and promote early maturity of rice. When the rice enters the yellow ripening period, it is generally necessary to stop the water or drain according to the specific conditions to facilitate harvesting.
2. Eliminate later weeds
It is necessary to cut the ridges and weeds on both sides of the channel as early as possible; for the remaining weeds in the field, weeding should be carried out manually 1-2 times after the ears of the ears.
3. Topdressing phosphorus and potassium fertilizers and foliar fertilizers
In order to strengthen the stalks and prevent lodging, and promote the fullness of the grains, the fertilizers with higher phosphorus and potassium contents are applied or the foliar fertilizers with higher phosphorus and potassium contents are sprayed from the ears to the filling stage. , Anti-lodging, increase seed setting rate, increase grain weight, increase yield and rice rate.
4. Application of plant growth regulators
After the rice is spiked, it is sprayed with triacontanol for foliar application. Generally, it can be matured early for 2-3 days, and it helps to promote the grain weight and reduce the grain rate. In the early stage of grain filling, ethinyl can be used for foliar spraying, which can also promote the early maturity of rice. Generally can be premature about 2-3 days.
5. Raise the water temperature of the paddy field
Where possible, old plastic film can be used to cover the irrigation canal closely to increase the temperature of the irrigation water in the aqueduct and promote premature ripening.
Gate valve is a gate opening and closing gate, the direction of movement of the gate and fluid perpendicular to the gate valve can only be fully open and fully closed, can not be adjusted and throttling. Valve through the valve seat and gate contact seal, usually sealing surface will be surfacing metal materials to increase the wear resistance, such as surfacing 1Cr13, STL6, stainless steel and so on. Gate valve is divided into rigid gate valve and flexible gate valve.
Material: Cast Iron, Ductile Iron,Carbon steel,Stainless steel
Type: Flanged, Screwed, Grooved
Standard: Class 125 to Class 250, or PN16 to PN25.
Size: 2" to 14"
Application: Pipelines with Water, Oil, Gas.
All other details or types, please send free requirments.
1.BS5150
2. DIN3352
Gate Valves,Flange Gate Valve,Resilent Seated Gate Valve,Grooved Gate Valve
HEBEI ZIFENG NEW ENERGY TECHNOLOGY CO.,LTD. , https://www.zifengpipeline.com