Greenhouse irrigation and fertilization technology

Greenhouse irrigation and fertilization technology

Greenhouse is a relatively closed production facility, natural precipitation can not be directly used, so the crop needs in the greenhouse water relies entirely on artificial irrigation measures to ensure.

Modern greenhouses are both automated and intelligent, i.e. they can automatically provide crops with the right growing environment in a timely manner according to their needs.

In modern greenhouses, micro-irrigation is used, i.e., the micro-irrigation system equipment is used to deliver water and nutrients required for crop growth directly to the soil surface near the roots and the crop leaves in the soil layer at a small flow rate, evenly and accurately, to achieve local irrigation, so that the foliage or roots of the crop are kept in the best water, fertilizer and gas The fertilization technology of modern greenhouses is based on the concept of micro fertilization.

Modern greenhouse fertilization technology is carried out simultaneously with micro-sprinkler irrigation, i.e., water and fertilizer are used, which can be done quickly and over a large area, and fertilization is uniform, labor-saving, time-saving, safe and avoids waste.

The fertilizer applicator is controlled by a computer or a small controller, which allows precise fertilization. Its automatic control structure block diagram is shown below.

The automatic control fertilizer application system adopts block structure and modular design scheme, which is a two-stage distributed system with the advantages of high flexibility, low power consumption and high reliability.

The upper computer mainly completes data management such as displaying, editing, storing and printing out of greenhouse measurement and control data, as well as intelligent decision-making and statistical analysis of historical data.

The lower computer in the field of greenhouse in situ measurement and control, can travel to detect a number of environmental parameters, and according to the set mathematical model, directly control the controlled object, can receive the instructions of the upper computer through Rs422 or RS485 serial interface or send the measurement and control data to the upper computer for storage.

Automatic monitoring technology of greenhouse environment

The modern greenhouse control system is based on the temperature and humidity sensors, light sensors, CO2 sensors installed inside and outside the greenhouse to collect data information, through the control equipment to drive to line agencies to regulate and control the environmental climate and irrigation and fertilization in the greenhouse to meet the needs of crop growth and development.

Greenhouse control mode is divided into two ways: manual control and automatic control.

According to the control factors can be divided into single-factor control, multi-factor control, "environmental model + physiological model" of integrated control and optimal control.

Greenhouse energy-saving technology

Modern greenhouse production is a new industry with high output and high energy consumption.

In the spirit of green agriculture and sustainable development strategy, greenhouse energy saving is very important. Greenhouse energy saving technology refers to various measures to reduce energy consumption in greenhouse crop production.

The energy consumed in greenhouse includes light, heat, water, electricity and fertilizer. The main energy saving measures we can consider are the following.

1. When planning the location of greenhouses, pay attention to choosing sites facing the sun, near heat sources, and avoiding wind gusts.

2. greenhouse construction design, the use of high insulation performance of the enclosure materials, double inflatable, insulation shade, reduce the penetration of cold wind in the greenhouse, perimeter insulation and cold treatment.

3. use variable temperature management in greenhouse management.

Modern greenhouse is subject to the constraints of environmental factors, the use of advanced control technology, greenhouse environmental factors to control, so that it provides suitable conditions for the growth of crops, can achieve high quality, high output, and can balance the supply of annual vegetables and fruits, and can grow valuable flowers, Chinese medicine, vegetables, fruits and so on, the market has great potential for development.