So, what are the varieties of winter jujube? What are the characteristics of fertilizer requirement of winter jujube trees? How to fertilize winter jujube trees? Let's take a look at it.
What are the varieties of winter jujube 1, Zhanhua Dongzao: the fruit is medium and large, the fruit shape is similar to that of an apple, the average fruit weight is14 ~16g, the maximum fruit weight is 23.2g, the skin is thin and brittle, it is ochre red after aging, the pulp is tender and juicy, slightly grassy, and there is no residue when eaten raw.
2. Chengwu Dongzao: The fruit is large, oval in shape, with an average fruit weight of 25.8 grams and a maximum fruit weight of 32 grams. The fruit surface is uneven, the peel is thick, the appearance is dark ochre, the flesh is crisp, hard, less juicy, sweet and the fresh food quality is excellent.
3. Xuecheng Dongzao: The fruit is large, the shape of the fruit is round and slightly flat, the average fruit weight is 22 grams, and the big fruit can be over 40 grams. The pulp is crisp, the taste is slightly rough, and the juice content is moderate, but the quality of the fruit is poor. Some fruits have the appearance of "exonuclear".
Characteristics of fertilizer requirement of winter jujube trees Winter jujube can be divided into four stages: root growth-before bud emergence, growth depends entirely on reserve nutrition stage; At the budding-fruit setting stage, the reserve nutrition and the current nutrition are the same as the supply stage; Fruit expansion-color change stage, using the nutrition stage of the year; Post-harvest-defoliation stage, nutrient storage stage.
How to fertilize winter jujube trees: First, increase the application of organic fertilizer with stability as the core.
Organic fertilizer is not only full of nutrients, but also can improve soil physical and chemical properties, which is beneficial to the occurrence and growth of winter jujube root system, expand the distribution range of root system, enhance tree potential and improve fertilizer utilization rate.
The second is to seize the key fertilization period.
Grasp the early stage, first promote the robust growth of branches and leaves, then control the crown in time to promote the differentiation of flower buds, and grasp the four stages of monthly fertilizer, before germination, before flowering and fruit expansion in the annual cycle.
Third, topdressing and balanced fertilization, with emphasis on the characteristics of fertilizer demand in each period.
Focus on nitrogen fertilizer in the early stage and cooperate with phosphorus and potassium fertilizer; In the later stage, phosphorus, potassium fertilizer and trace element fertilizer were added to control nitrogen fertilizer.
Fourth, soil fertilization, combined with topdressing outside the roots.
If nutrition supply is insufficient, winter jujube will have the following problems: yellow leaves, small leaves and slow growth of new shoots; Physiologically, the flowering and fruiting are serious, and the flowering and fruiting rate is low; The fruit swells slowly, the sugar content is low, and the taste becomes worse; Balance vegetative growth and reproductive growth, and go on the market prematurely; The tree is weak, the root density is low, and it enters the aging period ahead of time.
The above is the information about the varieties of winter jujube, the characteristics of fertilizer demand of winter jujube trees and how to fertilize them. I hope the above information can help you.