There are many factors affecting plant growth. At present, scientists have identified 52 factors, such as soil organic matter, soil moisture, root depth, temperature, humidity, illuminance, wind speed, etc., so it is important to master these factors in the plant growth environment. The following is a simple analysis of the effects of temperature, humidity, and illuminance on plants. Effect of temperature on plant growth The effect of temperature on plant growth is comprehensive. It can affect the growth of plants by affecting the metabolic processes such as photosynthesis, respiration, and transpiration, as well as the metabolic processes that affect the synthesis and transportation of organic matter. It can also directly affect soil temperature and temperature. Influencing the growth of plants by affecting the absorption and transport of water and fertilizer. Since the activities of enzymes involved in metabolic activities have different performances at different temperatures, the effects of temperature on plant growth also have the lowest, optimum and maximum temperature three basis points. Plants can only grow at the lowest temperature and the highest temperature range. Although the optimum temperature for growth refers to the fastest growing temperature, this is not the most robust temperature for plant growth. Because at the optimum temperature, the organic matter in the plant is consumed too much, the plant grows slender and weak. Therefore, the cultivation of robust plants in production practice often requires temperatures below the optimum temperature, which is called the optimum temperature for coordination. Effect of humidity on plant growth The factors affecting absolute humidity depend mainly on the source of water vapor, the ability to transport and maintain the water vapor. Therefore, the factors affecting water vapor supply, such as precipitation, the presence of water, the level of soil moisture, and evaporation conditions, etc., affect the conditions of water vapor transport such as wind, vertical airflow, etc., as well as conditions that affect the ability of air to maintain water vapor, such as temperature, etc., may affect Absolute humidity. The relative humidity is determined by the absolute humidity on the one hand and the air temperature on the other hand. Relative humidity or saturation difference of air is one of the important factors affecting plant water absorption and transpiration. When the relative humidity is small (the saturation difference is large), if the soil moisture is sufficient, the plant transpiration is more vigorous and the plant grows better. If the air humidity is saturated for a long time, the plant growth will be inhibited, resulting in lower grain filling rate, increased cotton buds, increased cotton vitality and affecting cotton harvest quality. If the relative humidity is too small, it will aggravate the soil drought or cause atmospheric drought. Especially under the condition of high temperature and lack of soil moisture, the water balance of the plant will be destroyed, and the water will not be able to make enough, which will hinder the growth and reduce production. The relative humidity and saturation difference can restrict the time of flower anther cracking, pollen scatter and germination of some plants, thus affecting the pollination and fertilization of plants. Humidity is also closely related to the occurrence of crop pests and diseases. In the environment where the wheat larvae are humid, the cotton aphid and red spider are suitable for living in a low humidity environment. Humidity is high, which is easy to cause a variety of diseases such as wheat rust. Effect of illuminance on plant growth Light is the source of energy for photosynthesis in plants. Photosynthesis is mainly done by relying on the chlorophyll of plants. In plant ecology, it is usually divided into three categories: positive plants, negative plants and negative-tolerant plants according to the different requirements of plants for light. Positive plants mean strong growth in a strong light environment and growth under concealed and low light conditions. Dysplastic plants. Negative plants are plants that grow well under weaker light conditions than under strong light conditions. But this is not to say that the weaker the requirement for the negative plant is, the better, because when the light is too weak to reach the compensation point of the negative plant, it will not grow normally, so the negative plant requires weaker light. It is also only relative to positive plants. Negative plants grow in wet, shady areas or are born in dense forests. A shade-tolerant plant is a plant that is between two classes. These plants grow best under full sunlight, but they can tolerate moderate concealment or require lighter shade during birth. However, the same plant has different light requirements at different stages of development. Woody plants such as Magnolia, Eucommia, etc., need to be shaded at the seedling stage, afraid of glare. When the ginseng seedlings are overcast, the adult plants are Xiyang. Although Coptis is a negative plant, it has different stages of growth and different degrees of tolerance. The seedling stage is the most resistant to yin, but in the fourth year after planting, the cloak can be removed and grown under strong light, which is good for root growth. Under normal circumstances, plants need more nutrients during flowering and fruiting stages or storage organs such as tubers, and the requirements for light are higher. Understanding the ecological types of plants on illuminance is very important in the rational cultivation of medicinal plants, as well as interplanting, introduction and domestication. There are already manufacturers on the market that are capable of measuring one parameter or multiple parameters. For example, the temperature recorder only detects the temperature, the temperature and humidity recorder can detect the temperature and the humidity, and the temperature and humidity three-parameter recorder can simultaneously detect three parameters of temperature, humidity and illumination. Polarizing Microscope ,Polarized Light Microscopy,Polarized Optical Microscopy,Polarised Light Microscopy Ningbo ProWay Optics & Electronics Co., Ltd. , https://www.proway-microtech.com
Effect of temperature and humidity on plant growth