Friday, July 30, 2010

How Greenhouse Climates Work in the Growth of Plants

There are geothermal heated greenhouses that support a plant’s life process in changing climate conditions. These heated greenhouses consume a large amount of heat energy when it comes to gardening and agriculture. However, it should be satisfying to most gardeners because of the good results they provide to the growth and development of a plant.

Most of these energy needs and geothermal conditioning are basically structured according to the environmental and ecological orientation of most greenhouses. The energy needs are adjusting based on the certain climate changes that may occur from the different seasons of the year. They are built with light materials that have minimal insulating features to create a stable climate inside the greenhouse.

The external climate brings a different approach to an internal climate system in a greenhouse. The necessity to have a greenhouse may occur during colder seasons where there is limited sunlight. The main purpose of having an internal climate system is to optimize the needed factors for plant growth. The internal climate factor that will be obtained is the photosynthesis process involved in environment and plant reactions.

Photosynthesis is the reaction process between the plants and the sun’s solar radiation. This means that carbon dioxide is supplied by sunlight to create a life process for the plants. There is a certain amount of climate heat that is calculated to designate the needed supply for lighting and heating. The greenhouse climate is essential in calculating the needed heat and coldness to the demand of the greenhouse.

The existence of heating and humidifying systems can adjust to the conditions of any external climate changes. Some processes that take part to the continuous energy balance maintained in any greenhouse is the water transport through the soil, plant canopy, and air. The formation of chlorophyll affects the entire internal climate. This happens because of the effect of heat transfer, solar light, oxygen and carbon dioxide cycle.

Here are some factors in valuing each aspect of parameters that is important to the climate condition and character of the internal climate.

1. The air movement in the greenhouse may influence the needed heat transfer on the air composition to the plant canopy. It also involves the process of water transfer to the plant canopy. This process will sustain the energy balance needed by the plants to continue a healthier life process in the greenhouse.

2. The heating installation is essential for the proper distribution of temperature inside the greenhouse. It also allows a controlled air movement to maintain the humidity and moisture in air characteristics that is affected by the external climate changes.

3. The water transport in the greenhouse also plays a big role in sustaining the photosynthetic process in the environment the plants. The roots have aspects pertaining to cultivation base that offers a needed amount of water, which is also needed in humidity and greenhouse temperature.

4. The air temperature affects the whole energy state inside the greenhouse. It is the connective heat supplied in the different aspects of the environment. The characteristic of the air movement in the greenhouse influences the leaves and stems of each plant.

5. The light factor is very essential in producing photosynthesis reaction to the plant’s canopy and to the formation of carbon dioxide that serves a big role in the respiration of the plants. Its necessity takes significance on the plants’ development and life process inside the greenhouse. Solar radiation provides instant intensity of light spectrum to supply the needed warmth and heat energy during colder seasons.

6. The soil or ground base temperature affects the condition of the climate inside the greenhouse as well. The significant parameter involves the transfer of heat energy directly to the ground structure, which includes the roots and the water flow system that partakes in the plants’ growth.

7. The carbon dioxide concentration also takes part in the life process inside the greenhouse. The normal average of carbon dioxide concentration in the external air atmosphere is 0.03%. This is important to maintain a balanced temperature and humidity density in a greenhouse.

It is important for a greenhouse to have installed systems to create an environment that will provide continuous life process for plants in changing climate conditions. A well-planned greenhouse climate should assure a person of having proper distribution of light, temperature, water, carbon dioxide, and other essential factors needed for every plant to grow.

Sunday, July 25, 2010

Top Tips To Constructing Your Commercial Greenhouse

The productivity and efficiency of operating a greenhouse is prim arily dependent on the kind of growing materials used.

Kinds of Greenhouses

Detached greenhouses generally independently stand from each other. However, they can be joined to gain access by way of a corridor to the other greenhouse.

The Quonset is the most common detached type of greenhouse for use in commercial production. These types are constructed using arched rafters that normally have end solid walls for added support. Quonset greenhouses types are appropriate for most crop varieties however the growing capacity is to a certain degree restricted close to “the side walls” which reduces productivity and efficiency.

Ridge greenhouses are joined through the eave with a shared gutter. Normally, an interior wall located underneath the gutter is absent permitting increased productivity.

Ridge greenhouses can either be curved arch or gabled. Gabled greenhouses are generally suitable for substantial coverings such as fiberglass or glass, whereas curved arch greenhouses are usually covered with much lighter materials such as polycarbonates or polyethylene. Many connected ridge greenhouses often are called "range".

Planning

This is one of the very important steps which have to be taken into careful consideration by the grower. Proper area selection with connection to labor, markets, utilities as well as future expansion really makes a lot of difference in how the business will profit and grow.

Here are basic things to consider:

• Crops that you will be growing (potted plants, Bedding plants, perennials, herbs, vegetables, etc.)

• The growing period of the crops (seasonal or year-round)

• Plants that will be grown (flats, pots, hydroponics bed, troughs, etc.)

• Growing medium (no soil, soil, mix, compost, nutrient solution, etc.)

• Growing methods (flooring, movable or fixed benches, growing bags, beds and flood)

• Annual productivity (space that is required)

• Marketing technique (retail, wholesale or both)

• Investment or capital

Here are things to be considered when constructing a commercial greenhouse:

1. Space. The area required greatly depends on your kind of business whether retail or wholesale. The minimum space must be more or less two acres so to make available parking for employees and customers, driveway access for deliveries, area for storage and also for future expansion. A wholesale venture generally will require much more because the greenhouse will be a lot more bibber and wider.

2. Zoning. These are local regulations that controls land use and encourage safety, health and the community’s welfare. Note that greenhouse operations are permitted in particular zones only.

Frontage, distances of side yards, signs and also parking spaces should be specified. You should confirm with your zoning officer and ask what is required and ask regarding building codes so you will know if a permit will be needed.

3. Highway Access. Site location with regards to highways must be taken into account. For retail business, a location beside or along a high traffic road or beside a considerable residential site can greatly increase business. Wholesale business needs access to some interstate highway so to deal with heavy truck road traffic.

4. Environment. Select a location that is away from “industrial pollution”.

5. Climate. Avoid areas with extreme temperatures, as in the winter plant growth is directly related the light that is received.

6. Slope. Ground slope to provide water drainage is very important. Greenhouses must be situated on gravel base, 6-12 inches above grade.

7. Water. Plants need sufficient moisture supply for optimal development and the highest production of flowers. As to how much water is required will greatly be determined by how big is the area that will be watered, weather conditions, crops grown, time of the year and “the environment control system”.

Note that water that comes from “natural sources” have some amount of impurities present, and are at times harmful to plant growth. You should have the water tested for chemicals that can be present in your water system, to address the problem, if there is a problem.

8. Electricity. Your commercial greenhouse should have enough supply of electricity as well as distribution system must be provided so to supply and manage environment in the greenhouse. As early as in the designing stage of the greenhouse, you should already call on your area’s electric utility regarding power availability and also call on your electrician to design the electrical layout.

9. Expansion. All throughout the development and planning stage, provisions must be considered for later expansion.

Note that before going into the business, as in any business, careful assessment should be made before a decision is made. Plan it carefully. Good Luck.