The influence of light
Plants need light from the east, they begin to feed themselves. Only
in this light grows, develops, and this is the source of energy for photosynthesis.
Obtain vigorous plants, healthy, grow and develop in a rapid and sustained
a rich flowering, is due to the influence of intense lights and an optimal
temperature, which increases the assimilative capacity, intensifying the
absorption, the need for activation of water and nutrients and gas exchange.
Light is important both in terms of intensity and duration. Plants to
light intensity requirements are different depending on the geographical
origin of the light conditions were formed, the age and condition of vegetation,
some works (transplanters, transplanted and so on). Up to rooting light
should be diffuse. Requirements are larger flower plants in the seedling
stage, bud formation and flowering.
Productive during the day (day light) for the process of photosynthesis
some plants need about 2000 lux, and others more, and to produce flowering
species less demanding than light factor requires 10,000 to 50,000 lux.
Depending on the rate of use of light radiation, flower species can be
plants impartial light, and shadow semidarkness.
Light-loving plants: Eschscholtzia, Fuchsia, Gladiolus, Gloxinia, Helianthus,
Pelargonium, Petunia, Salvia, Verbena, etc..
Need less light: anemone, Convallaria, Galanthus, Myosotis, Scilla etc.
By the way plant response to light duration, they are divided into long
day plants, short day, indifferent and intermediates.
Long day plants flower: aster, Aechmea fascinating Begania tuberhybrida,
Calceolaria hybrida, Calendula officinalis, Callistephus chinensis, Gladiolus,
Lathyrus odoratus, Lilium longiflorum, Matthiola annua, Papaver, Petunia,
Scabiosa Caucasia, Sinning hybrida, Stephanotis floribunda.
Short day flower plants: Begonia Gloire de Lorraine, Bougainvillea, Bouvard
longiflora, Cactee, Chrysanthemum indicum, Cosmos, coccinea Crassula,
Euphorbia fulgens, Euphorbia pulcherrima, Fressia, Gardenia grandiflora,
Kalanchoe blossfeldiana, Tagetes erecta, the Mexican Zinnia.
A number of plants are indifferent to the light factor: Cyclamen, Dianthus,
Impatiens, Narcissus, Pelargomium, Rosa etc..
Most plants from temperate or tropical zone are long day or indifferent.
Short day plants flower for floral induction in need of long nights and
short days, while the long days can flourish even if these are kept in
the dark. In short day plants form vegetative apparatus in long days and
autumn or winter bloom. It is good asector plant seedlings to occur during
long days. Vegetative period of long day plants can be covered in short
days, but for flowering is necessary to pargurga a period of long days
and short nights. For as long day plants to grow in good condition as
the day they need to be 14 to 16 hours. These plants if grown in short
day conditions, no bloom.
Short day plants bloom when the day is less than 12 hours. For floral
induction training, short day plants need short days.
As induction to occur, sometimes light enough for one day, sometimes more,
for plants that bloom in long days and flowering plants in short days
is enough to illuminate a small amount artificial.
Application of artificial lighting is forcing mareimportanta the following
plants: Convallaria, forsythia, Gladiolus, Hyacinthus, Iris, Lilium, trilobites
Prunus, Rhododendron indicum, Tulipa etc. To artificial light bulbs or
tubes can be used placed above the plants.
Normal flowering plants in autumn or winter (short days) and shorter day
light is applied during the summer are: Begonia Glory of Lorraine, chrysanthemum,
Kalanchoe, Poinsettia etc. The material in light shading to shorter days
can be in black cloth, preferably of synthetic fibers to withstand, black
polythene sheeting etc.