The white clover is a perennial turfgrass plant with low plant height and well-developed root system. Its life span is generally more than 10 years. The main stem is short. The stem stem grows from the stem section. The adventitious roots grow downward on the section, and the long leaves grow upward. It is very aggressive and quickly spreads into the flat. The root has a strong ability to deliver and regenerate, and maintains its symbiosis with leguminous rhizobia. Three leaflets were born on the top of a long handle, hence the name "Shamrock." Inflorescences are continuously extracted in summer and autumn. Seeds have an ability to self-seeding after they have matured. White clover and light and warm climate, the most suitable temperature for the growth of 20-25 °C, able to bear half shade, there is a strong adaptability. Widely cultivated in the Yangtze River basin in China, it can maintain evergreen in the winter. Strict requirements on the soil, as long as the drainage is good, all kinds of soil can grow, especially hi-rich calcium and humus clay soil.
The preparation of the white clover seeds is small, and the top soil of the seedlings is poor. Before sowing, the land must be leveled and fined to facilitate seedling emergence. In areas where the soil is heavy and the amount of precipitation is large, drainage should be done to facilitate drainage.
Sowing is best for September-October. It can also be broadcast in the spring of March-April. In the middle and lower reaches of the Yangtze River, it is generally planted before and after mid-September. The amount per square meter is 10-15 grams, spread or drilled, and the drilling distance is 30 centimeters. After dressing with equal amounts of fertile soil, sowing is better. Keep the soil moist after sowing. Seedlings can emerge from 3-5 days and be fully seedlings on the 10th.
Applying a small amount of nitrogenous fertilizer will help strong seedlings. Phosphorus and potassium fertilizers are mainly used for fertilization, and nitrogen fertilizer is applied in an appropriate amount. Before sowing, apply 20-25 kilograms of calcium phosphate per acre and a certain amount of manure as basic fertilizer. After emergence, the plants are short and yellow, and a small amount of nitrogen fertilizer should be applied. Apply 10 kg urea or the corresponding amount of ammonium sulfate per acre to promote strong seedlings. The compound fertilizer was chased once in March. The application of 30-40 kg per mu to the turf roots, followed by watering, significantly enhanced the growth potential, improved the ability to resist high temperatures, and reduced the phenomenon of dead grass.
Field management White clover seedlings grow slowly and are vulnerable to weeds. The weeds should be diligently sowed at seedling stage, and spring sowing should be the case. When the grass height is 20-25 cm, it can be cut appropriately to increase ventilation and ventilation. With strong regeneration ability, it can quickly form the second layer of grass. In the hot season, the white clover ceases to grow. To remove large weeds in time after 2-3 years of grass cover formation. If the lack of seedlings occurs due to high temperature and drought in summer, it can be replanted in autumn to restore the lawn. White trifoliate disease is less, sometimes there is brown spot, powdery mildew, can be cast first, and then use Bordeaux liquid, lime sulfur or carbendazim and other control. White trilobites are more harmful, especially crickets and snails. The pesticide used for the 50% methyl isofluosad was sprayed with 3 kg of water per acre and 3000 kg of water per acre in mid-April, late July and early August, and the water sprayed in time after spraying to make the medicine wet through the ground. 7-10 cm, the earthworms died after contact with the soil. This method is still not ideal for a small part of older larvae. For snails, spray insecticides have a poor control effect. In the evening, they are sprayed with worms granules in the lawn. The dosage is 1.5-2 g. The effect is very good and the mortality rate is over 90%.
Winter management removes dead and dead leaves. During the growth of white clover, with the new and old branches and leaves renewing and growing, the ground surface will gradually form a thick layer of dead branches and leaves, which is the overwintering place for pathogens and eggs. The removal of dead and dead leaves will have a good inhibitory effect on the occurrence of pests and diseases in the coming year. Before the onset of the cold winter season, pouring overwintering water (permeate about 15 to 20 cm) and applying organic fertilizers together with antifreeze will not only provide enough nutrients for the growth of the turf in the coming year, but also have certain insulation effects. In this way, winter fertilizer and frozen water can not only improve soil nutrients and water conditions, ensure safe wintering, but also create good conditions for returning green growth of turf in the following year.
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