How to water the national orchid in the north

The national orchid is an acidic plant that grows in a rainy and humid environment. Life is inseparable from water, because water is the raw material of photosynthesis and the component of protoplasm. Water is the most abundant substance in Guolan. According to the determination of Jianlan, the water content of plant, root, pseudobulb and leaf is 67.3%, 85.6%, 52.9% and 50.9%, respectively.

The law of water consumption of Guolan is mainly the evaporation of plant materials, which increases with the increase of temperature and decreases with the increase of air relative humidity, and the wind speed also has a great influence. The second is leaf transpiration, transpiration increases with the increase of plant growth, and environmental conditions also play an important role.

Hangzhou, the main producing area of Chunlan, has an annual precipitation of 1489 mm and an average annual air relative humidity of 80%. In Yongding County, Fujian Province, where Jianlan is the main producing area, the annual precipitation is 1670 mm, and the air relative humidity changes between 76% and 82%, with the largest from April to July of the year, often more than 80%. In Jinan in the north, the annual precipitation is only 692 mm, which is 49.5% of that of Hangzhou and 43.3% of that of Yongding; the air relative humidity is only 65%, which is about 15% lower than that of Hangzhou and Yongding.

As shown in the above table, except that the air relative humidity of the two places is equal in August, Jinan is low in other months, especially in Yongding County from April to July and the lowest in Jinan from March to June. The water quality is mostly natural precipitation in the south, while the water in the north is mostly calcium and weakly alkaline, and the best one is neutral. In short, the relative humidity of the air (especially in spring) and water quality can not meet the requirements of the growth and development of the orchid, so appropriate measures must be taken to ensure the normal birth of the orchid.

The water used for raising orchids was fish pond water and was treated with oxalic acid. 90 jin of water, 6 grams of oxalic acid, PH5.5-6.0 after treatment. Humidification, choose pot orchid into the greenhouse in winter, move into the flower pool at the beginning of March, the pool depth is 95 cm, adjust the height of pot orchid with flower rack, prevent cold with plastic film, shade the light with shading net. Greenhouse and flower pond are easy to control humidity. When the rainy season comes at the end of June and the beginning of July, the air relative humidity increases, and then the pot orchid is moved into the flower shed. Enter the flower pond first in autumn and then into the greenhouse. Watering time, according to the water requirements of the national orchid, the climate and the current situation of granular plants, mainly immersion and flushing irrigation, sprinkler irrigation with sprinkler irrigation, immersion or flushing every 3 mi 7 days in different seasons, cold 10-12:00, no irrigation on the day to spray, moisturize the upper basin plant; spring 8-10:00 watering, 11:00 to 3 pm sprinkler irrigation, before and after 4-5 pm spray, moisturize the upper basin plant. The mixed plant materials are mainly immersion irrigation and sprinkler irrigation. In short, the plant material must be moisturized regularly. The granular plant material prevents the upper part from being too dry, and the mixing frame material prevents the lower part from getting too wet. It can be a little dry in cold weather. Jinan balcony raised orchids, increased the water surface, placed basin orchids above the water surface, adjusted humidity, and achieved good results.

"dry orchid wet chrysanthemum" is relatively speaking, "orchid and chrysanthemum are better dry than orchid": the orchid itself is "dry to wet, and wet is more harmful than dry". But also plant moisture is conducive to the growth of national orchid, because water is the raw material of photosynthesis, lack of raw materials, photosynthesis can not be carried out. In addition, in some cases, the moisture of the root system is regulated to the stems and leaves, which also affects the normal activity of the root system, so "the moisture of the plant material" should be emphasized.

When it rains in summer, when the difference between the water temperature and the plant temperature is too big, it should be watered after the rain to adjust the temperature of the material. Ensure that the root system is in a suitable temperature range. If the temperature difference between precipitation and plant material in the basin is small, and it is not a rainstorm, it is more beneficial to be washed by Rain Water.

High temperature, high humidity, such as temperature above 25 ℃, relative humidity about 90%, fungus is easy to sprout, must be ventilated and cooled, spraying fungus pesticides, such as Topurazine, Shigao, etc., 5 Mel is sprayed once every 7 days, especially at the stomata on the back of the leaves and the wounds of the damaged leaves, to prevent fungal invasion.

Wang Shuping, a famous orchid family, advocated that "watering at night, if watering in the morning, should avoid light for a day". Under its specific conditions, it has achieved good results, and my generation should make an in-depth study according to my own situation. (Wang Tao)