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

Now it is the season when citrus ripens and comes into the market, but at this time there is a phenomenon that makes fruit growers headache_citrus green, citrus green will seriously affect the quality of citrus, not only the appearance is affected, but also reduce the sweetness of citrus, the impact on fruit farmers 'income is relatively large. So what causes citrus to turn green when harvested? Let's get to know each other.

I. Reasons for Citrus Rejuvenation

1. Weather

Low temperature helps the accumulation of sugar and anthocyanins in fruits, thus promoting fruit color conversion. However, if abnormal warming weather occurs during the color conversion period, the pericarp that has not fully matured will preferentially restore chlorophyll synthesis, thus returning to green.

2. Poor tree vigor

Fruit trees with poor tree vigor have limited nutrients synthesized through leaf photosynthesis, and the minerals absorbed by roots are insufficient to meet the needs of fruit growth, so the fruit will change color ahead of time and appear false ripening phenomenon. In the later stage, after supplementing nutrition through root fertilization and foliar fertilizer, the fruit will appear a temporary phenomenon of green.

3. Excessive nitrogen fertilizer

When foliar fertilizer with too high nitrogen content is sprayed during citrus color transformation period, too much nitrogen element will react with sugar in fruit to produce organic nitrogen, thus reducing sugar content in fruit, resulting in vigorous growth of branches and leaves, competing for nutrients with fruit growth and development, resulting in decline of citrus fruit quality, decrease of anthocyanin content in pericarp, and thus green return phenomenon.

2. How to avoid citrus fruit turning green?

1. Adjust the tree potential

Should be properly pruned, strengthen the tree vigor, avoid tree vigor decline, leaf yellowing, resulting in fruit or immature phenomenon. Many fruit growers spray paclobutrazol at the color conversion stage, which generally does not cause fruit greening, but if a large amount of paclobutrazol is sprayed at a high concentration when the tree is weak, it will make the tree weaker and cause greening.

2, with fertilizer

In the fruit color conversion period with fertilizer, unless the tree is too poor, leaf color fading serious, otherwise it is generally not suitable for root fertilization, it is recommended to enter the fruit coloring swelling and sweetness, from the leaf supplement nutrients, can spray Ziguo Hong or high-dimensional dew K400 foliar fertilizer, sweetening coloring and swelling fruit, and enhance fruit storage resistance.

3. Timely picking

In order to avoid fruit over-ripening, sugar regression and greening, citrus fruits should be picked timely and timely. In addition, there are many rainy days in winter, insufficient light for a long time, excessive nutrient consumption of trees, large fruit hanging quantity and first-class extension of harvest, which is easy to cause tree decline, fruit drop and greening may occur. Fruit growers 'friends had better pick them in batches in time.

The above is an introduction to the reasons and preventive measures for citrus color reversion. I hope it can help you. If you want to know more about relevant knowledge, please pay attention to us.