Annual herb, 1-2 m high; The stems of cylindrical coffee are Huang Kui-shaped with scattered thorns. The leaves are palmately 3-7-lobed, with a diameter of 10-30 cm. The lobes are wide to narrow, with coarse teeth and notches on the edges and coarse hairs on both sides. Petiole is 7- 15 cm long and covered with bristles; Stipules linear, 7- 10 mm long, coarsely hairy.
Flowers are solitary in leaf axils, pedicels are 1-2 cm long and sparsely hairy; Bracteoles 8- 10, linear, about 1.5 cm long, sparsely hairy; Calyx campanulate, longer than bracteoles, densely stellate tomentose; The flowers are yellow, the inner base is purple, the diameter is 5-7 cm, the petals are obovate and the length is 4-5 cm.
The capsule is tubular and pointed, with a length of 10-25 cm and a diameter of 1-5-2 cm, with a long beak at the top and sparse bristles; Seeds spherical, numerous, 4-5 mm in diameter. , with hairy veins. Flowering period may-September.
Extended data:
Growth habit of okra;
I. Temperature
Coffee Huang Kui likes warmth, is afraid of cold and has strong heat resistance. When the air temperature is 65438 03℃ and the ground temperature is about 65438 05℃, the seeds can germinate. But the optimum temperature for seed germination and growth period is 25-30℃. The monthly average temperature is lower than 17℃, which affects flowering and fruiting; When the night temperature is lower than 14℃, the growth is slow, the plants are short, the leaves are narrow, the flowers are few and the flowers are many. At 26-28℃, there are many flowers, high fruit setting rate and fast fruit development.
Second, moisture.
Huang Kui coffee is drought-tolerant and moisture-tolerant, but not waterlogged. Excessive soil moisture in germination stage is easy to induce seedling blight. The fruit period is dry, the plant growth is poor, and the quality is poor. It is necessary to keep the soil moist at all times.
Third, light.
Huang Kui coffee is particularly sensitive to light conditions, which requires a long light time and sufficient light. Choose sunny plots, strengthen ventilation, pay attention to reasonable close planting, and avoid mutual shading, which will affect ventilation and light transmission.
Fourth, soil.
Coffee Huang Kui has wide adaptability to soil, regardless of fertility, but loam or sandy loam with deep soil layer, loose and fertile soil and good drainage is more suitable. Nitrogen fertilizer is the main fertilizer in the early stage of growth, and more phosphorus and potassium fertilizer are needed in the middle and late stage. However, if there is too much nitrogen fertilizer, plants will grow in vain, flowering and fruiting will be delayed, and fruit-setting nodes will increase. Insufficient nitrogen fertilizer and poor plant growth affect flowering and fruit setting.
Baidu Encyclopedia-Coffee Huang Kui