How to Cultivate Whole-stem Four Seasons Camellia in Vietnam

After the tea tree enters the perennial management stage, the shading degree of the shade shed should be controlled between 30% and 40%. If the shade is too low, there will be sun-drying seedlings. The soil moisture content should be about 55%, which is beneficial to the flowering and fruiting of camellia Vietnam. In the process of tea garden management, it is necessary to keep the water flowing in the ditches in the garden and create good soil moisture and air humidity for the tea garden. For places far away from ditches, water them often, and the watering time should be in the afternoon in spring and autumn, preferably in the early morning and evening in summer, and at noon in winter. In hot and dry weather, water 2~3 times a day to ensure the normal growth of tea trees.

Soil management: Soil is the basis for the growth of sessile camellia in Vietnam, and it is also the main source of nutrients and water supply. In perennial management, it is necessary to strengthen the management of soil, continuously improve soil fertility, create conditions for the good growth and distribution of roots, and thus promote the growth of aboveground parts. In order to reduce water evaporation and promote soil nutrient decomposition in agricultural operations, it is necessary to carry out intertillage weeding, deep tillage and soil improvement frequently. Weeding in intertillage is generally carried out three times a year, that is, in February, May and August every year, and the tillage depth is about 10 cm. Deep ploughing and soil improvement should be carried out once every 1-2 years, generally combined with base fertilizer application in autumn. The depth of deep turning is 30-40 cm.

Fertilizer control: After the camellia in Vietnam entered the perennial growth period, the demand for fertilizer also increased. Usually, fertilizer should be applied three times a year before each new bud grows. The first topdressing was carried out in February-March, and this topdressing was to promote spring shoot fertilization, which could promote the spring shoot germination of tea trees. Nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer are mainly available. The fertilization amount per mu is 30 kg of urea, 5 kg of potassium sulfate and 0/5 kg of calcium superphosphate/kloc-0. The fertilization method is also hole application, that is, a pit with a depth of about 10 cm is dug at the distance from the root120 cm, and the fertilizer is tightly covered to improve fertilizer efficiency. The second topdressing was carried out in mid-May to meet the needs of the growth and development of summer shoots, and the types and quantities of topdressing were the same as those of the first time. The third topdressing was carried out in July and August. This topdressing can promote the growth of autumn shoots, mature roots and underground roots, and also promote the flower bud differentiation of mature camellia sinensis. Generally, potassium sulfate ternary compound fertilizer is applied, and the application amount per mu is 30 kg.