I. Planting techniques
Okra grandiflora belongs to Hibiscus, Malvaceae, and its Latin name is HibiscusmoscheutosLinn. It is also known as Hibiscus and Hibiscus hibiscus, which is native to North America. Deciduous shrub-like. The leaves are large and broadly ovoid, and the petiole and the back of the leaves are densely covered with gray stellate hairs. Flowers are large, solitary in the axils of leaves, with white, pink, red and purple colors. Like sunshine, slightly tolerant of shade, suitable for warm and humid climate, avoid drought, resist water and humidity, and thrive in fertile sandy loam near the water. The flowering period is from June to August.
Planting and water and fertilizer management
Okra can be planted in early spring or late autumn. When planting, fermented cow and horse manure or dried chicken manure should be used as base fertilizer, and the base fertilizer should be fully mixed in the planting soil. Planting should be shallow in spring and deep in late autumn. After planting, soil should be piled for cold protection and heat preservation. Sprinkle the first water immediately after planting in spring, the second water after five days, the third water after one week, and then water once a month. Seedlings planted at the end of autumn can be piled up with soil to keep warm after being watered once. In summer rainy days, water should be removed in time. Okra is fond of fertilizer. After applying base fertilizer when planting, a small amount of NPK compound fertilizer can be applied in early April. At the end of autumn, combined with freezing water, apply rotten leaf fertilizer once.
prune
The natural crown shape of Okra grandiflora is relatively loose, so it can be trimmed according to the needs of the garden during the maintenance process. First, attention should be paid to not affecting pedestrians; Second, the branches that are too long should be cut short to prevent them from affecting the crown shape; Third, if you don't leave seeds after flowering, you should cut off the residual flowers in time to prevent excessive consumption of nutrients; Fourthly, pruning the over-dense branches to keep the plants ventilated and transparent; Fifth, the branches and stems on the ground should be cut off before winter, so as to help pile up soil for cold protection.
extermination of disease and insect pest
The common disease of Okra grandiflora is leaf spot, which is a frequently-occurring and common disease of Okra grandiflora and generally harms the leaves of plants. This disease is caused by the infection of fungi, and the peak period of the disease is high temperature and high humidity in summer. At the beginning of the disease, there are light black spots on the leaves. With the development of the disease, the spots gradually expand into patches, and finally connect into pieces, and the leaves fall off after being rolled. For the prevention and treatment of this disease, first, we should pay attention to the nutritional balance and not apply nitrogen fertilizer in a partial way; Second, we should pay attention to the ventilation and light transmission of plants, and prune the over-dense branches in time; Third, if there is a disease, 75% thiophanate methyl wettable powder 1000 times solution should be used for spraying once every seven days, and continuous spraying for two or three times can effectively control the disease. The stems are cut off, which is beneficial to pile up soil to prevent cold.
One-year-old seedlings of Okra grandiflora can safely overwinter under the condition of extensive management, but the lateral roots of the overwintering seedlings in the first year were damaged by certain freezing, and there were sporadic black spots with a diameter of 2 to 3 mm, but it did not affect the overwintering and the growth and flowering in the next year. The overwintering perennial roots began to germinate at the roots in the first half of April of the following year, and began to be unearthed in the last half of April. They spread their leaves from the end of April to the beginning of May, and began to grow rapidly in the middle half of May, budding in the middle of June and flowering in the first half of July.
Plants that are more than two years old bloom continuously from early July to1mid-October, but there can be three flowering peaks in terms of flower quantity. The first time starts in early July and lasts for 15 to 20 days, mainly the main stem flowers, and then the flower quantity will be reduced appropriately. There was a second flowering peak in mid-August, and the second peak was mainly a secondary flower, and the flower quality was not obviously different from that of the main flower. This peak could last for one to five days, and then the third flowering peak appeared in mid-September, but the flower amount was less than the previous two, mainly the secondary flower, and it continued to bloom from mid-to-late 10, but it was not a peak.
Second, the nutritional value
The fruit mucus of Okra grandiflora contains many nutrients, such as glycoprotein, pectin, milk polysaccharide, Arabic gum and so on, which can help digestion and improve the gastrointestinal function and skin care of human body. Mucus and its sodium are beneficial to people with stiff joints, and its protein, vitamins and minerals are higher than those of ordinary vegetables, which can help to eliminate fatigue and restore physical strength.