Causes and preventive measures of turning green in citrus color conversion period

It is now the season when citrus is ripe and on the market, but at this time there is a headache for fruit growers-citrus turning green will seriously affect the quality of citrus, not only the appearance will be affected, but also the sweetness of citrus will be reduced. it has a great impact on the income of fruit growers. So what is the reason for turning green during citrus harvest? Let's get to know it.

1. Reasons for citrus turning green

1. Weather

Low temperature contributes to the accumulation of sugar and anthocyanin in the fruit, thus promoting the color conversion of the fruit, but if the abnormal temperature recovery weather occurs in the color conversion period, then there is no fully mature pericarp to restore the synthesis of chlorophyll, thus turning green.

2. The tree potential is poor.

For the fruit trees with poor tree potential, the nutrients synthesized by leaf photosynthesis are limited, and the minerals absorbed by the roots are not enough to meet the needs of fruit growth, so the fruit will change color in advance and appear the phenomenon of false ripening. In the later stage, after the nutrition was supplemented by root fertilization and foliar spraying, the fruit would turn green briefly.

3. Excessive nitrogen fertilizer

When foliar fertilizer with high nitrogen content is sprayed during citrus color conversion, excessive nitrogen will react with sugar in the fruit to produce organic nitrogen, thus reducing the sugar content in the fruit, resulting in vigorous growth of branches and leaves, and competing for nutrients with fruit growth and development. as a result, the quality of citrus fruit and the content of anthocyanins in the peel will also decrease, resulting in the phenomenon of turning green.

Second, how to prevent citrus fruits from turning green?

1. Adjust the tree potential

The tree potential should be strengthened by proper pruning to avoid the decline of tree potential, the yellowing of leaves and the occurrence of fruit or immaturity. Many fruit growers spray paclobutrazol during the color conversion period, which usually does not cause the fruit to turn green, but if the tree is weak, spraying a large amount of high concentration paclobutrazol will make the tree weaker, thus causing the tree to turn green.

2. Use fertilizer

In the period of fruit color conversion, unless the tree potential is too poor and the leaf color fades seriously, it is generally not suitable for root fertilization. It is suggested that fruit coloring and sweetness should be added. Starting from the foliar supplement of nutrients, fruit red or high vitamin K400 foliar fertilizer can be sprayed to sweeten and color the fruit and enhance the storage resistance of the fruit.

3. Pick in time

In order to avoid overripening and sugar rejuvenation, citrus fruits should be picked timely and timely. In addition, Rain Water has many days in winter, lack of light for a long time, excessive consumption of tree nutrients, and citrus harvest, which can easily lead to tree potential decline. falling fruit and turning green may occur, and fruit farmers had better pick them in batches in time.

The above is the citrus color conversion period of green reasons and preventive measures, hope to help you, want to know more related knowledge, please follow us.