Cotton dressing has a coup

During the whole growth period, the cotton needs to show obvious dynamic changes of less than one to several, that is, the emergence of a bud (from May 1 to June 10) has a small period; budding and flowering (from June 10 to June 7) On the 5th of the month, the demand for fertilizer increased rapidly; the flowering boll (from July 5 to the end of August) required fertilization to reach the highest peak; the boll opening and one harvest (after the end of August) gradually decreased again. The main points of cotton dressing are determined according to the law of fertilizer requirement in the life of cotton:

Light, partial or no Miao Fei: cotton into the growing season, intense competition between the plants nutrients, weak seedlings can easily compete for nutrients and not bud, flowering phenomenon, so the cultivation of strong seedlings is the basis for high yield. In the case of a sufficient amount of Ba, when the emergence of seedlings is neat, the seedlings can be applied neatly or not; if the seedlings are high, short, strong, and weak, the short- and weak-seedlings must be applied in a partial manner to promote strong growth and seize high yields.

Steady application of budding fertilizer: After budding of cotton, buds begin to appear and the amount of fertilizer needs to increase rapidly. Nitrogen fertilizer should be topdressed to supplement the deficiency of nutrients. It is not advisable to pay attention to the time when topdressing nitrogenous fertilizer. It should be carried out during Shenglei period.

Replanting flower bud fertilizer: Shiba time is controlled 7~10 days after flowering, and the lower part sits on a bell with a diameter of 2cm or more (July 15th to 20th), and mu application of urea is 10~15kg to promote plant growth. The lower peach grows.

Apply top dressing fertilizer: In early August, the cotton enters the boll opening period, and the growth amount gradually weakens. The appropriate amount of top dressing fertilizer can be used for the upper autumn peach at this stage, and the quality of the autumn peach can also be improved. Mu recovery urea 3 ~ 5 kg, combined with pest control can be foliar spray fertilizer.

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.

       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

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