![]() In time to maturity can help in saving heat and fertilization costs. Plants have earlier maturity and more crops can be harvested annually.Increase in photosynthesis results in increased growth rates and biomass production.This is also called ‘ CO 2 enrichment’ or ‘ CO 2 fertilization.’ Growing conditions ideal, supplemental CO 2 can provide improved plant growth. Nutrients, the amount of CO 2 is the only limiting factor for maximum growth of plants. The development of improved lighting systems, environmental controls and balanced ![]() The greenhouse industry has advanced with new technologies and automation. Industry and indoor gardening since the 1970s has dramatically increased the needįor supplemental CO 2. High CO 2 concentration have been recognized since the early 19th century, growth of the greenhouse In general, CO 2 supplementation is the process of adding more CO 2 in the greenhouse, which increases photosynthesis in a plant. Relation between CO 2 concentration and rate of plant growth. Levels of CO 2 may cause plant damage (Figure 1).įigure 1. Show a positive response up to 700 to need of 1,800 parts per million, but higher An increase in ambient CO 2 to 800-1000 ppm can increase yield of C 3 plants up to 40 to 100 percent and C 4 plants by 10 to 25 percent while keeping other inputs at an optimum level. Their photosynthetic pathway, thus are called C4 plants). Have a 3-carbon compound as the first product in their photosynthetic pathway, thusĪre called C 3 plants and are more responsive to higher CO 2 concentration than plants having a C 4 pathway (most of the grass species have a 4-carbon compound as the first product in Plants with a C 3 photosynthetic pathway (geranium, petunia, pansy, aster lily and most dicot species) 700 to 800 parts per million) can make a significant and visible difference Generally,ĭoubling ambient CO 2 level (i.e. Levels of CO 2 even for a short period can reduce rate of photosynthesis and plant growth. The carbon dioxide level may drop toġ50 to 200 parts per million during the day in a sealed greenhouse, because CO 2 is utilized by plants for photosynthesis during daytime. Of plant respiration and microbial activities. The carbon dioxide level is higher at night because However, the concentration is much lower than ambient during the day and much higherĪt night in sealed greenhouses. The ambient CO 2 (naturally occurring level of CO 2) concentration of 400 parts per million can occur in a properly vented greenhouse. Variation in CO 2 concentration depends upon the time of day, season, number of CO 2-producing industries, composting, combustion and number of CO 2-absorbing sources like plants and water bodies nearby. Humidity and temperature may affect the rate of CO 2 utilization, the amount of CO 2 in the atmosphere has a greater influence. Although atmospheric and environmental conditions like light, water, nutrition, Photosynthesis utilizes CO 2 in the production of sugar which degrades during respiration and helps in plant’s So, plants are always in a CO 2 deficient condition, which limits their potential growth. The CO 2 produced during respiration is always less than the amount of CO 2 taken in during photosynthesis. Respiration (oxidation of stored sugars in plants producing energy and CO 2) plants take in oxygen (O 2) and give off CO 2, which complements photosynthesis when plants take in CO 2 and give off O 2. Take in CO 2 through small cellular pores called stomata in the leaves during the day. Minor gas in the atmosphere, but has an important role for sustaining life. (400 parts per million) of the atmospheric volume. Carbon dioxide currently comprises 0.04 percent Photosynthesis is the process which involves a chemical reaction between water andĬarbon dioxide (CO 2) in the presence of light to make food (sugars) for plants, and as a by-product, Effect of supplemental CO 2 on different growing factors.
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