When fertilization plants grow faster, they should top-up a “foliar manure†and apply 1500–2000 kg of farmyard manure per acre and 20–25 kg of superphosphate. If the soil fertility is high and the base fertilizer is sufficient, the fertilizer can be postponed appropriately. Fertilizer can be changed to 750 kg human waste or 100 kg grass ash, 30 kg ammonium humic acid, 30 kg superphosphate, combined with deep fertilizer.锄 锄 进行 进行 进行 进行 进行 进行 进行 进行 进行 进行 进行 soil, then watering. After the White Dew Festival, it enters the period of vigorous growth of the scallion, which is the key period for the development of welsh onion production. It should be combined with watering to apply “strong manure†twice, each applying 15-20 kg of urea and 10-15 kg of potassium sulphate. Applying to the rows, watering after shallow cultivating, in order to speed up the absorption and utilization of fertilizer.
Watering at the end of summer and autumn, the field management center is to promote the root, watering should be carried out due to the weather, in addition to the long sunny and not rain, under normal circumstances should pay attention to control the water, rain after the flood control, to prevent rot, yellow leaves and dead seedlings . At the same time, strengthen the cultivator and promote root growth. Between the beginning of autumn and Bailu, the principle of light pouring, watering in the morning and evening should be mastered in irrigation. After the white dew, green onions enter the peak of growth, and irrigation should be based on the principles of pouring and re-watering. Pour water once every 4 to 6 days. After the frost falls, the temperature drops, the onion basically grows, the water requirement decreases, and the soil is kept moist. Watering was stopped 5 to 7 days before harvest to reduce the moisture content of the onion, in order to facilitate the harvest and prolong the storage period.
Soil management combined with water and fertilizer management also requires scientific training. Soil cultivation is an important measure to soften leaf sheaths, prevent lodging, and increase light blue yield and quality. From the beginning of the autumn to the harvest, the soil is usually cultivated three times. The former two times combined with the cultivator, the ridge soil will be plunged into the onion ditch, and the ditch will be filled after the summer heat. The height of each cultivating earth shall be determined according to the height of the growth of the pseudo-stem, and each time 3 to 4 cm, the soil shall be cultured to the leaves of the uppermost blade, and the heart shall not be buried to prevent the leaves from decaying.
Sprinkler irrigation and micro-irrigation automatic control equipment With the development of economy, water resources, energy shortage and labor cost increase, more and more water-saving irrigation systems will adopt automatic control. This article focuses on the advantages and classification of automated irrigation.
The advantages are as follows:
(1) It is possible to truly control the amount of irrigation, irrigation time and irrigation cycle in a timely and appropriate manner, thereby increasing crop yield and significantly improving water utilization.
(2) Saving labor and operating expenses.
(3) The work plan can be arranged conveniently and flexibly, and the management personnel do not have to go to the field at night or other inconvenient time.
(4) Since it can increase the effective working time every day, the initial capital investment in pipelines, pumping stations, etc. can be reduced accordingly.
classification:
First, fully automated Irrigation System
The fully automated irrigation system does not require direct human involvement. The pre-programmed control procedures and certain parameters that reflect the water requirements of the crop can automatically open and close the pump for a long time and automatically irrigate in a certain order. The role of the person is simply to adjust the control program and overhaul the control equipment. In this system, in addition to emitters (heads, drip heads, etc.), pipes, fittings, pumps, and motors, it also includes central controllers, automatic valves, sensors (soil moisture sensors, temperature sensors, pressure sensors, water level sensors, and rain sensors). Etc.) and wires.
Second, semi-automatic irrigation system
In the semi-automated irrigation system, no sensors are installed in the field. The irrigation time, irrigation volume and irrigation period are controlled according to pre-programmed procedures, rather than feedback based on crop and soil moisture and meteorological conditions. The degree of automation of such systems is very different. For example, some pump stations implement automatic control, and some pump stations use manual control. Some central controllers are only one timer with simple programming function, and some systems have no central control. The controller, but only some of the sequential switching valves or volume valves are installed on each branch pipe.
Automated irrigation is the trend of the times. In the future water-saving irrigation projects, more and more automated irrigation systems will be applied.
Irrigation System
Degree Irrigation Nozzle,Irrigation for Agriculture,Impact Drive Sprinkler,Plastic Drip Irrigation Fittings
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