The greenhouse eggplant is a fertilizer crop, which has a long growth period, a long period of time, high yield, and a large amount of fertilizer. Therefore, the base fertilizer must be applied before planting.
The amount of fertilizer applied between the old shed and the new shed should be different. Because the old shed has more residual fat than the new shed soil, the new shed will be more fertilized than the old shed. It was determined that most of the old greenhouse soil has excess nitrogen, phosphorus is enriched, and potassium is insufficient. Under normal circumstances, the new shed will use 6,000 kilograms of organic fertilizer per acre, and the old shed can reduce the amount of application and add 20-30 kilograms of potassium sulfate.
Organic manure must be fully decomposed. Organic fertilizer and potash fertilizer should be poured into the soil after application. Pay attention to the fact that manure and soil should be fully mixed and prepared for the fixed value.
After planting, flowering and fruit setting usually do not require fertilization, and cultivation management is mainly temperature management. In flowering and setting period, the eggplant pods are thicker, the internodes are shorter, the leaves are larger, the buds are large, the leaves are shiny, and the roots are well developed. The pods are fine, the leaves are small, the color is light and the flowers are small, indicating that the pods are weak. It is often caused by lack of fertilizer. At this point, 0.2% urea or potassium dihydrogen phosphate can be sprayed on the leaves. After the door tomato sits, apply 20 kg of ammonium sulfate per acre and apply it to a hole or a hole. After harvesting, it can be applied with 15 kg of urea or 1,000 kg of diluted manure water. The eggplant enters the harvesting period, indicating that it has entered a period of fruitful results. During this period, water should be poured every 7 to 8 days, and once every second application of water, organic fertilizer and chemical fertilizer should be used alternately. The application amount is 15 to 20 kg of ammonium sulfate or 1000 kg of diluted feces. After the harvest, add 10 kg of potassium sulfate to supplement the deficiency of potassium in the soil.
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.
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