What causes citrus to turn green?

In the process of citrus production, there will be a phenomenon of turning green, which seriously affects the appearance of the fruit, and the sugar and acidity of the fruit will decrease, which will reduce the quality of the fruit and affect the income. So what is the cause of citrus turning green? Let's take a look at the detailed introduction.

1. Excessive accumulation of nitrogen fertilizer

Excessive application of nitrogen fertilizer during the growing period will lead to excessive accumulation of nitrogen in the soil, coupled with the Rain Water climate during the fruit ripening period, it will easily lead to the phenomenon of fruit turning green. Therefore, in autumn shoots, it is recommended to apply less long-acting chemical fertilizer and choose quick-acting chemical fertilizer as shoot-promoting fertilizer, which can avoid fertilizer not being completely decomposed and lead to nitrogen volatilization in overcast and rainy weather, thus causing the phenomenon of turning green.

2. Weather temperature difference

During the citrus color conversion period, low temperature can contribute to the accumulation of sugar, anthocyanins and carotenoids in the fruit, thus promoting the fruit color conversion, but if the climate is warmer during the color conversion period, at this time, the unripe pericarp will restore the ability to synthesize chlorophyll, thus turning green. So once the phenomenon of cold air or warm current occurs during the color change, it will prolong the color change or lead to turning green, and preventive measures should be taken during the color conversion period.

3. Excessive quick-acting fertilizer

If too much available fertilizer or foliar fertilizer with high nitrogen content is sprayed during the citrus color conversion period, too much nitrogen will form organic nitrogen with ventilation in the fruit. As a result, it will reduce the sugar content in the fruit, cause the branches and leaves of the plant to grow, compete with the fruit for ventilation, lead to the decrease of sweetness of citrus fruit, and the content of anthocyanins and carotenoids in the pericarp will also decrease, which is very easy to turn green. Therefore, in the fruit color conversion period, we should pay attention to the amount of fertilizer, should not apply too much available fertilizer, foliar fertilizer should also pay attention to nitrogen elements.

4. The tree potential is poor.

For the planting with more fruit and less leaves, the nutrients synthesized by photosynthesis are limited, the tree potential is poor, and the nutrients absorbed by the roots are also helpful, so the fruit will change color in advance and appear false ripening, and when topdressing and maintaining nutrition in the later stage, the fruit will turn green briefly. Therefore, for the plants with poor tree potential, the flowers and fruits should be thinned in time, the number of fruit should be controlled, and the nutritional supply should be strengthened at the flowering and fruiting stage.

The above is the introduction of the cause of citrus turning green. I hope it can help you. If you want to know more about it, please follow us.