What season of jujube seedlings
Date:2018-07-13 Source:
During the planting period of winter jujube seedlings, there are two kinds of autumn planting and spring planting. In the winter where there is no severe cold, the average temperature in January is not lower than -8 °C, it can be planted in autumn, that is, after the leaves of the jujube fall to the soil before freezing. In the jujube area south of the Yangtze River in China, the winter is warmer and the soil is better. The roots of the jujube roots can heal in the same year, and some new roots occur. It can grow in time in the spring of next year. Therefore, jujube trees have a high survival rate and good growth. Most of the jujube areas north of the Yangtze River in China are cold in winter, low in geothermal temperature, and even frozen. After the jujube seedlings are planted in autumn, the water absorption of the roots is weak, while the drought and windy often cause the above-ground part of the transpiration to increase, causing the branches to lose water and the wrinkles to dry and even dead. In recent years, in some areas, when jujube trees are planted in autumn, the survival rate of autumn seedlings has been significantly improved by adopting measures of watering after planting, pouring frozen water and re-priming germination water in spring. However, most areas in the north still adopt the method of spring planting. Experiments conducted by relevant departments of Hebei Province on jujube trees in different periods showed that the survival rate of jujube trees planted about 10 days before germination was significantly higher than other periods (such as planting 1 month before germination; jujube buds were 0.5-1.0 cm long). When planting, etc.) planted jujube trees. Planted during this period, there are fewer buds and buds, and the growth potential is also strong. The reason is that during this period (before and after thawing of the soil to the germination of jujube trees), the transpiration of the seedlings is small, the nutrients stored in the body are many, and the roots recover quickly after planting, and the survival rate is high. Some jujube areas in Hubei Province have experience in autumn land preparation and spring tree planting. The practice is that in the autumn, the land is prepared by 1 meter, and in the spring of the second year, every 666.7 square meters (1 mu) is planted with 5,000 kilograms of decomposed cow dung.