What Causes Thick Peel in Shiranui Oranges? A Clear Explanation in One Article

Shiranui orange is a very popular orange variety and has a very large market demand in our country. Therefore, the planting area of Shiranui oranges is still very large, and many Shiranui orange growers often encounter the problem of excessively thick peel when growing them. It not only affects the appearance of Shiranui oranges, but their commercial value is also affected. So what causes thick peel in Shiranui oranges? Let's take a look together with the editor below!

1. Boron deficiency

Shiranui oranges actually have certain requirements for the growing region, and most southern regions are not suitable for growing Shiranui oranges. This is because the soil in most southern regions is acidic, and there are also many rainy days. This causes large losses of elements such as boron, magnesium and manganese, so when Shiranui oranges are grown in the south, deficiency symptoms are very likely to appear. If Shiranui oranges lack boron during growth, various conditions such as small fruit, thick peel, sourness and deformation will appear. The leaf veins will also become very swollen, and both old leaves and young leaves will show different symptoms.

2. Gibberellin reasons

When growing Shiranui oranges, many growers habitually use some gibberellin. This is because gibberellin has the effect of promoting plant cell division and enlargement, and reasonable use is very beneficial to the yield and fruit quality of Shiranui oranges. However, it should be noted that after Shiranui oranges set fruit, the young fruit is mainly composed of cell walls, and the flesh gradually forms later. If too much gibberellin is used, or the concentration is too high, when preserving the fruit of Shiranui oranges, the peel cells of the fruit will divide and enlarge excessively, causing phenomena such as deformation and thick peel.

3. Excessive nitrogen fertilizer

Shiranui oranges have certain growth patterns during growth. When fertilizing, we should reasonably control the fertilizer according to the growth pattern of the fruit. Under normal circumstances, during the first 2/3 of fruit development, it is mainly the time when the fruit expands. In the final period, the growth center of the fruit changes to accumulating dry matter, and at this time we must pay attention to controlling nitrogen fertilizer application. If nitrogen fertilizer is applied excessively, it will not only easily cause the peel to become thicker, but also easily cause excessive vegetative growth of the fruit tree, consuming too much nutrition. This is very unfavorable to its yield and fruit quality.

4. Weather reasons

Weather is also a main reason causing the peel of Shiranui oranges to become thicker. During the flower bud differentiation and flowering period of Shiranui oranges, if abnormal weather such as late spring cold or low temperature is encountered, then it will hinder the normal development of the ovaries of some flowers. Although these flowers can be pollinated normally and set fruit, after fruit set, the fruit usually develops poorly, and the fruit's transport system is also very poor. This affects the transportation of organic nutrients, causing deformed fruit and thick peel.

The above is a brief introduction to what causes thick peel in Shiranui oranges. Everyone should do a good job in prevention and control according to the specific reasons to reduce the phenomenon of thick peel. That is all for today's introduction. Thank you for reading and supporting.