cture
11-30-2006, 12:49 AM
Please read carefully before answering.
Started to grow recently (week 1), started to research scientific literature aboout growing. The aim: perfect plant.
Sat in the library and
Resuts of my research are following.
Red light with a maximum of radiation of 640-670 nanometers promotes intensive growth of leaves and axial bodies. On red light we observed the highest growth effect, stimulated by photoreceptor of red light - fitochrome. Blue light slows down growth of a stalk and the area of leaves that leads to formation of plants with low productive efficiency.
In green area of a spectrum (a maximum of radiation of 520-550 nanometers) were formed thin leaves with smaller number of cells of chloroplast and with the lowest rate of photosynthesis per area of the leaf, but with the highest phtosynthesis in account to chloroplast.
Thus, each of three basic areas of PAR (dark blue, green and red), taken separately, is poorly suitable for cultivation of plants and only the radiation taken in a certain parity of energy on all spectrum, can provide cultivation of high-grade plants. Strong infringement of this parity, for example, when plants receive a maximum of radiation only in dark blue area of a spectrum, leads to formation of undersized plants with high photosynthesis, but low productive efficiency. Strong skew on a spectrum in red area of a spectrum, on the contrary, leads to excessive growth of vegetative bodies (leafes) To the detriment of generative( BUUUUDDDS).
Thus, spectral structure of light as well as its intensity, is strong morfogenic factor regulating growth, vegitative and photosynthetic reactions in system of the whole plant. Thus it is desirable to have a following parity of energy on a spectrum of PAR in lamps for many agricultural plants: 25-30 %- blue area (380-490 nanometers), 20 % in green (490-590 nanometers) and 50 % - in red area (600-700 nanometers).
In these conditions photosynthesis was supported within all light day without midday depressions, daily consumption of CO2 was considerably above, than at solar illumination, photosynthesis and growth have been well balanced.
And my main problem: what light should I pick. HPS doesn't seems to meet requrements above, however they write that their par 360w out of 1000w bulb but in fact the parity of color in spectrum stated above isn't reached and is mostly intensive between green and red, the only thing is good in this lamp is lifetime.
Thinking of xenon lghtining.
Your opinions with well stated arguments are welcome.
Started to grow recently (week 1), started to research scientific literature aboout growing. The aim: perfect plant.
Sat in the library and
Resuts of my research are following.
Red light with a maximum of radiation of 640-670 nanometers promotes intensive growth of leaves and axial bodies. On red light we observed the highest growth effect, stimulated by photoreceptor of red light - fitochrome. Blue light slows down growth of a stalk and the area of leaves that leads to formation of plants with low productive efficiency.
In green area of a spectrum (a maximum of radiation of 520-550 nanometers) were formed thin leaves with smaller number of cells of chloroplast and with the lowest rate of photosynthesis per area of the leaf, but with the highest phtosynthesis in account to chloroplast.
Thus, each of three basic areas of PAR (dark blue, green and red), taken separately, is poorly suitable for cultivation of plants and only the radiation taken in a certain parity of energy on all spectrum, can provide cultivation of high-grade plants. Strong infringement of this parity, for example, when plants receive a maximum of radiation only in dark blue area of a spectrum, leads to formation of undersized plants with high photosynthesis, but low productive efficiency. Strong skew on a spectrum in red area of a spectrum, on the contrary, leads to excessive growth of vegetative bodies (leafes) To the detriment of generative( BUUUUDDDS).
Thus, spectral structure of light as well as its intensity, is strong morfogenic factor regulating growth, vegitative and photosynthetic reactions in system of the whole plant. Thus it is desirable to have a following parity of energy on a spectrum of PAR in lamps for many agricultural plants: 25-30 %- blue area (380-490 nanometers), 20 % in green (490-590 nanometers) and 50 % - in red area (600-700 nanometers).
In these conditions photosynthesis was supported within all light day without midday depressions, daily consumption of CO2 was considerably above, than at solar illumination, photosynthesis and growth have been well balanced.
And my main problem: what light should I pick. HPS doesn't seems to meet requrements above, however they write that their par 360w out of 1000w bulb but in fact the parity of color in spectrum stated above isn't reached and is mostly intensive between green and red, the only thing is good in this lamp is lifetime.
Thinking of xenon lghtining.
Your opinions with well stated arguments are welcome.