The nutritional properties of plum tree
The accumulation of nutrients in the tree is closely related to the root activity, and the root system is also constrained by the activities of various parts of the above-ground parts. Therefore, the root system is mostly wavy. In general, saplings have three peaks in the whole year. Root temperature rises in the spring and activities begin. When the temperature is appropriate, the first peak occurs. This peak is mainly due to the consumption of nutrients stored in the previous year. With the growth of new shoots, nutrients are concentrated on the ground, and root activity shifts to low tide. When the slow growing fruit of the new shoot has not yet expanded rapidly, a second peak of hair rooting occurs at this time, and the nutrients consumed this time are produced by the photosynthesis of the leaves. After fruit enlargement, flower bud differentiation and high temperature, root activity turned into a low tide.
Mature trees have only 2 peaks of hair roots throughout the year. After spring root activity, they grow slowly until the end of the shoot growth. The first peak of hair rooting occurs. This is the main rooting season of the year and it is the autumn season. The second peak occurs.
The short fruit development time of plums requires high quality fertilization: Li is an early mature fruit tree in fruit trees, and early-maturing varieties range from 80 to 85 days from flowering to harvesting. Li Guo is smaller than other fruit trees, and measures to increase the fruit size of the plum tree are mainly controlled by rational fertilization in addition to fruit thinning and pruning.
It is very sensitive to nitrogenous fertilizers: According to the trials in the fruit testing field in Yamanashi Prefecture, Japan, the growth of plum trees is greatly reduced due to the lack of nitrogen. Under the same conditions, the impacts on plum, sorghum, and olive trees are much less than those of plum trees. According to the growth and development needs to be fertilized in appropriate periods: In order to increase the effect of fertilization, different fertilizers should be applied according to the needs of the growth and development of plums. Phosphorus, calcium, and magnesium fertilizers centered on basal fertilizer should be applied at one time. However, for nitrogen and potassium which have a greater impact on tree growth and fruit enlargement, part of the annual fertilization amount should be converted to top dressing application.
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