Plastic greenhouses, as a kind of plant protection cultivation facilities suitable for northern climate characteristics and low prices, on the one hand ease the high cost of building greenhouses, on the other hand provide a good growth environment for plant growth, can provide a large area in the north The production or distribution center of the foliage plant. The use of greenhouses to produce foliage plants has also increasingly demonstrated its advantages in terms of cost and market competition.
The conservation of greenhouse plants must pay attention to the following aspects:
First, moisture Because the foliage plants come from high temperature and high humidity areas, high temperature and water content are the main factors for their growth and development. The climate in the north is relatively dry, mainly due to the low air humidity, which often causes the tips of the leaves to dry up and the leaves to lack luster. Therefore, the growing season should be sprayed with foliage, in the summer heat season, the greenhouse increased ventilation, but also increase the number of water spray (avoid the water temperature difference is too large, spray water droplets to the best). In practice, many plants are found in high temperature environments, such as maintaining certain high temperature conditions, and their growth is significantly accelerated. Due to the lower temperature in winter and lower plant physiological activity, watering and foliar spray should be reduced. In the summer greenhouse, the humidity and temperature are different from those in the open air and indoors. The principle of watering should be established according to the actual conditions in the greenhouse and the nature of the potted soil. For some plants that grow slowly or dormancy during the high temperature period in summer, they should be placed in a well-ventilated place, and watering should be kept to keep the potted soil dry properly to prevent root rot.
Second, temperature and temperature are important factors for normal growth of foliage plants. Most of the foliage plants are native to low latitudes in the Americas, tropical rainforests in southern Africa and Southeast Asia. Its climate is characterized by high average annual temperature, small temperature difference between winter and summer and day and night, no obvious seasonal changes, neither high temperature nor cold. Therefore, most of the foliage plants are poor in cold resistance and high temperature resistance. China is cold in winter and hot in summer, especially in the north of winter, it is necessary to pay attention to heat preservation and temperature increase. Large plastic greenhouses generally adopt inflatable insulation layers, and in winter, the north is mainly surrounded by wind surfaces with cold walls, which are warmed by heaters or are rarely resistant to cold. The type is divided into small rooms and covered with membranes and other methods to keep warm. In the summer, the temperature should be reduced through shading, water spray and ventilation.
Third, the light foliage plants grow in the shade of trees in the country of origin, and prefer a semi-shade or shaded environment. In the event of strong light, it often causes the blade to be agitated or withered. Some colored-spotted plants such as Golden Heart Dragonstem, colored leafhoppers, etc., are cultivated under scattered light in favor of the full expression of color, and overshadowing makes the color disappear or not bright. If the light is too strong, the leaves turn yellow and lose the color pattern. All plants should be given sufficient light in winter and spring to facilitate plant growth and enhance stress resistance. Due to the fact that most of the northern sheds are double-inflated, in particular, plastic films with 2 or more years of age are used to shade the shades according to the actual light in the shed. Due to the different origins of the foliage plant species, the demand for light is also different. Based on the plant's demand for light, combined with the characteristics of strong light on the south of the greenhouse and on both sides of the greenhouse, plants, overhanging plants, positive plants, and shade-tolerant plants are reasonably placed. Appropriate collocation, make full use of the shed space.
4. Prevention and control of pests and diseases The main focus of prevention and control is to install repellent insect nets on all sides of greenhouses, which greatly reduces the chances of pests entering the shed in summer. Most of China's summer air is hot and humid, and the air humidity in the greenhouse is particularly prominent. We must actively prevent various diseases. Bacteria often cause various lesions on the foliage, affecting their ornamental value. The carbendazim can be sprayed regularly to the foliage and the ground for prevention and treatment. The use of trichlorfon, dimethoate, etc. is based on pests. In addition, quarantine should be strengthened when introducing southern plants.
In addition, the growth of plants should be taken into account in the production conservation. For the potted plants, bricks should be placed on the bottom, which can prevent the roots of pots from growing into the underground and cause damage during the movement, and can also prevent the soaking of water in the basin. It can also increase the circulation of air and help prevent leggy and pests and diseases.
In short, the conservation and management of internal foliage plants in greenhouses must comprehensively consider the geographical location, natural environment and climate characteristics of the region, and also consider introducing the climatic characteristics, growth habits, and microclimate status of the habitats of the origin of the flowers. In a unified management model. To be good at discovering the limiting factors that affect the growth of flowers, and to formulate maintenance and management technical measures in order to ensure the provision of high-quality foliage plants.
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