White clover

Trifolium repens is also known as Trifolium principis-rupprechtii and the Dutch tilted, native to Europe and widely distributed in temperate and subtropical high altitude regions. China's Yunnan, Guizhou, Sichuan, Hunan, Hubei, Xinjiang and other places all have wild distributions, and the provinces south of the Yangtze River are planted on a large scale. (I) Characteristics White clover is a perennial herb of the family Leguminosae Clover. The main root is short and the lateral roots are well developed. They are distributed in the soil layer within 15 cm and have multiple nodules. The main stem is short, the base part is more than the stem, and stems are pods, 30-60 cm long, smooth and soft, stems sticking roots, and grow new stems spread around, and aggressive. Three compound leaves, petiole slender erect, 15-20 cm long. Leaflets obovate, leaves with "v" leukoplakia. The large amount of leaves and the uniform growth are the main components that constitute the yield of the white clover. The head racemes are produced at the white leafhopper and the pedicels are longer than the petiole. Each flower has 20-40 flowers, white or pink. The capsule is small, the seed is heart-shaped, yellow or brown-yellow, and the grain weight is 0.5-0.7 g. According to the leaf size, it can be divided into three types: large leaf, middle leaf, and leaflet. Large leaf type has larger leaves, higher grass layer, and better growth, but less pasturage resistance, more water is needed during growth, and grass production is higher; The lobular-type cultivars are smaller in size, resistant to trampling, and have a low amount of grass production, and the middle-leaf type is between the two. White clover and humid climate, the most suitable temperature for the growth of 19-24 °C, adaptability than other clover broad, heat resistance, cold resistance is better, shade-resistant, grow well in the shade of the orchard. The soil requirements are not strict, resistance to earthworms, acid, suitable soil ph6-7, not saline. (II) Cultivation Techniques The white clover seeds are fine, fine soil preparation is needed before sowing to remove weeds, and 1500-2000 kg of organic fertilizer is applied as base fertilizer per 0.067 hectare, and inoculated with rhizobia of clover. It can be sowed in spring or autumn. The south is suitable for autumn sowing. The sowing date is not later than mid-October. If it is too late, it will be susceptible to freezing injury. Seeding rate is 0.25-0.5 kg per 0.067 hectare. Drilling, broadcasting can be. Drilling spacing 30 cm, sowing depth l-1.5 cm. Trifolium repens is most suitable for the mixed sowing of perennial ryegrass, Dactylis edulis, Straw grass, and pigtail to increase the amount of grass production, and is also conducive to grazing and utilization. White trifoliate seedlings grow slowly. Attention should be paid to cultivating and weeding. Once the grass layer is established, the white clover is highly competitive and no longer needs to be cultivated. The white clover seeds can land on white soil and maintain the grassland enduringly. For frequent castration or grazing use. In the mixed grassland, the appropriate proportion of white clover and grass should be kept. When the grass is too full, castration or grazing can be used to reduce the grass, in order to facilitate the growth of the white clover, and the early flowering period can be cut and utilized. In the year of sowing, 1,000 kilograms of fresh grass will be produced per 0.067 hectares. After that, it will be cut 3-4 times per year, producing 2 500-4000 kilograms of fresh grass per 0.067 hectare, and more than 5,000 kilograms of high grass. Seed maturity is very poor, resulting in 15-30 kg seeds per 0.067 hectare. (C) The use of white trifoliate stems and leaves soft, rich in leaves, whether it is grazing or cutting is the use of its leaves, thus the crude protein content, crude fiber content is low, in the different stages of their nutritional composition and use value relatively stable. Dry matter digestibility was 75%-80%. Dry matter in flowering stage contained crude protein 24.7%, crude fat 2.7%, crude fiber 12.5%, no extract 47.1%, crude ash 13%, calcium 1.72%, phosphorus 0.34. %. All kinds of domestic animals like to eat, are horses, cattle, sheep, pigs, poultry, rabbits, fish, quality forage. Good resistance to trampling and good regenerability are the indispensable legumes for mixed perennial grassland in temperate regions. Mixing sowing ratios is ideal for grasses and white clover 2:1, which can maintain the highest yield of dry matter and protein per unit area. , And can prevent cows, sheep excessive intake of white clover caused by swelling disease. Except for forage grass, white clover is also a good soil and water conservation and urban and garden greening plants. It can also be used as green manure. (IV) Variety Emumu No. 1 White Trifolium is a new variety selected from traits of drought resistant and heat-resistance in animal husbandry and veterinary research in Hubei Academy of Agricultural Sciences. This variety is suitable for the mid-lower reaches of the Yangtze River and the vast warm temperate zone north of the Yangtze River. Planted in the north subtropical region, its drought resistance and heat resistance is better than other varieties in high-temperature and drought-deprived areas. The Guizhou white clover is a local forage used by forage grass and fodder stations of the Agriculture Department of Guizhou Province. It is cultivated by wild white clover from the Bijie region, Anshun region, and Guiyang region. It belongs to the middle-leaf variety; In mid-season varieties imported from New Zealand, both varieties are suitable for high-altitude mountainous areas in the south of China, and are planted in low-humid hills and plains in the middle and lower reaches of the Yangtze River. Chuan cited Latino White Clover is a large leaf type imported from the United States by Sichuan Agricultural University. With high grass production, it is suitable for planting on the hills, flat dams, and mountains in the upper and middle reaches of the Yangtze River. The above varieties have been registered and approved by the National Herbage Variety Approval Committee.