Bauhinia cultivation management technical points

Bauhinia is a deciduous tree belonging to the genus Bauhinia, which is widely used in gardens. Now we introduce its cultivation management technology as follows.

I. Morphological characteristics and ecological habits

Bauhinia is as high as 15 meters in height and 50 centimeters in diameter at breast height. It is used as a shrub in gardens. Purple flowers, 4 to 10 clusters on old branches, flowering in April, the first flower after the leaves, fruit mature in mid-late September. White Bauhinia is a common variant, and it is pure white.

Zijingxiguang grows vigorously in places with sufficient sunlight and has certain cold resistance. Adult seedlings in North China can safely survive winter without measures against cold. Zijingxi is fertile, well-drained sandy loam, and has poor growth in the clay soil. It has a certain salt and alkali resistance and grows robustly in alkaline saline soils with a pH of 8.8 and a salt content of 0.2%. Bauhinia is not tolerant of flooding, and planting in low-lying areas can easily lead to death due to root rot.

Second, water and fertilizer management

Zijingxi humid environment, immediately after the planting head water, the second day of pouring two water, the sixth day after the pouring of three water, three water after the water depending on the weather, to keep the soil moist and not water is appropriate. Watering in summer, and spraying leaves, timely drainage after rain, to prevent water rot. After the fall, if the temperature is not high, watering should be controlled to prevent fall hair. Pour enough antifreeze water before wintering. At the beginning of March of the following year, Qingshui was poured back, except in July and August depending on the amount of precipitation to determine if it was watered, and from April to October each time it was poured with water, and poured antifreeze water before winter. The same method was used for irrigation in the third year and normal management was implemented in the fourth year, but the antifreeze water and the returning green water had to be poured. If conditions permit, water will be poured once in mid-April and late September, and reliable in other seasons. Some people think that Zijing is drought-tolerant and afraid of flooding. In fact, Bauhinia is a humid environment, but it cannot grow under water.

Zijing Hi fertilizer, fat foot is flourishing, flowers more colorful, lack of fertilizer is sparse leaf sparsely, flowers less pale. The base fertilizer should be applied at the time of colonization, and it is better to use rot leaf fertilizer, ring fertilizer or dried chicken manure, and mix well with the planting soil, otherwise the root system will be burned. After normal management, nitrogen fertilizer is applied once a year after flowering to promote a strong growth, and a phosphorus and potassium compound fertilizer is applied in the early autumn, which is conducive to safe wintering after flower bud differentiation and lumbering of new-born shoots. In the early winter, combined with frozen water, cow horse dung was applied. Poor plant growth can be sprayed with 0.2% potassium dihydrogen phosphate solution and 0.5% urea solution.

Third, shaping pruning

Bauhinia is often used as a shrub in gardens, so pruning should be strengthened from the start of seedling breeding to facilitate the formation of a good plant shape.

After transplanting, the seedlings can be cut short and short, promoting their multi-branching, expanding nutrient area, accumulating nutrients, and developing root system. Hunchun can sever short cuts to make it sprout new branches, choose three branches with better growth, and keep all other branches cut off. During the growth period, water and fertilizer management will be strengthened, and the remaining branches will be topping. After planting, many sprouts will be removed in a timely manner to strengthen the tending of the branches left in the first year, and more topping will be done so as to multiply secondary branches.

In the cultivation, it is necessary to strengthen the renewal of flowering branches. Practice has proved that for old branches with more than 5 years, the amount of flowers is less, and flower buds move upwards, affecting the viewing, so they should be updated in a timely manner.

IV. Pest Control

1. Insect pests have the same pattern of beak, cotton aphid, tourmaline bag moth, green-brown hedgehog, green thorn moth, white-brown thorn moth and so on. If any occurs, it can be sprayed with 48% of 3100-fold emulsion of Looseben EC or 25% of evaporative demulsifier at the time of nymphs in the same time. If there is cotton aphid, it can be sprayed in early spring. Mixture; if there is a tourmaline bag moth, when the newly hatched larvae do not form a protective sac, spraying 20% ​​diflubenzuron suspension agent 7000 times for prevention and treatment; if there is a brown side green moth, green green moth, white eyebrow The moth emerges and can be killed in its larval stage using 500 times of Bt emulsion or 25% hypertonic phenoxy violet granules 300 times liquid or 1.2% wortacin oleoresin 1000 times liquid.

2. Diseases mainly include red spot disease, Bauhinia blight, and Zijing coal contamination.

Infestation of Cercis chinensis leaves on the leaves of Cercis chinensis, with brown spots on the leaves at the beginning of the disease. With the development of the disease, the spots gradually expanded to form irregular polygonal plaques, and dark green powder appeared on the lesions at the late stage of the disease. Particles.

This disease is caused by the infection of the pseudomycosis fungus P. zizanioides, and the pathogenic bacteria overwinter on mycorrhizal and deciduous mycelia. In the spring of the following year conidia spread by wind and rain, invaded through stomata or wounds. The rainy season is the peak period of onset. On a large scale, it often causes the leaves to wither and leaves early.

Control methods should be reasonably pruned, pay attention to ventilation and light transmission; strengthen water and fertilizer management, pay attention to nutritional balance, not partial nitrogen fertilizer; spray 75% of Miconazole wettable particles 800 times for control, once in seven days, spray three or four times.

Bauhinia blight is mainly harmful to shoots of Cercis chinensis. Small ulcers appear in the early onset branches, followed by widening of the bruising spots, sag of the diseased part, and the center of the lesion is black, and the edge is cracked. The xylem of the lesion turns brownish black, and the lesion expands around the branch. In the circle, the branches and leaves above the diseased part were withered.

This disease is caused by the infection of the fungus Gramosiderium fungus, which causes the mycelia to overwinter on the shoots of the shoots, and begins to infest when the humidity and temperature are appropriate in the spring.

Control methods should be promptly cut off the diseased branches and burned; on the lesions of large branching stems, the lesions can be scraped off, and the wounds can be coated with sulphur powder or with 50% thiobacillus 50 g plus 50% sulphur suspension agent. 250g mixed smear; spray 75% chlorothalonil wettable particles 700 times during the onset of the disease, once in 10 days, spray three or four times in succession.

Bauhinia coal contamination mainly damages the leaves. At the early stage of disease, the leaves appear flaky coal smoke layers. The patches gradually increase and thicken and connect with each other, and the heavy ones can cover the entire leaf.

This disease is caused by the infestation of the fungus Mycobacteria subsp. The pathogenic bacteria overwintered on the diseased leaves and diseased branches of the mycelium and was transmitted by the aphids, scale insects and wind and rain. When large amounts of scale insects and aphids emerged in June, their excreta and plant exudates were used as nutrients to induce large numbers of pathogenic bacteria.

Prevent and kill locusts and scale insects in time for prevention and control; strengthen pruning to maintain air and light; a small amount of dust can be used to clean scrub.

Fifth, breeding methods

Can be sown, ramets, cuttings and layering, but sowing is more commonly used.

In October, the fruit matured, and after detoxification, it was preserved. Choose sandy loam seedlings that are convenient for irrigation and fertility, and apply 400 kg of organic fertilizer per acre. In late spring, the seeds were sowed in warm water at 45°C for 24 hours. After sowing, it is solid with feet and watered. It can sprout in 25 days. After emergence, the seedlings grow slowly and are not deeply rooted. In addition to timely watering to keep the soil moist, they should be shaded in the summer to prevent seedlings from being burned. Everyday management should pay attention to loose soil weeding, disease prevention and pest control. After the anti-freezing water is poured at the end of the fall, the seedlings should also be covered with soil and cold.

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