Analysis of the Causes of Premature Senescence in Nian Ju and Preventive Measures

Nian Ju is a subtropical evergreen fruit variety. During the New Year, placing a pair of kumquats at the bedside or on the table carries the meaning of great fortune and good luck arriving, making it an essential fruit for festivals and holidays. Moreover, Nian Ju has a relatively high yield, but it is extremely prone to premature senescence. So what causes the premature senescence? How should it be prevented? Let us learn about it together.

1. Substandard seedlings

Many farmers, in order to save a little money, rush to plant seedlings of unknown origin, knowing nothing about whether the fruit seedlings have been quarantined, or whether they are old seedlings, inferior seedlings, or diseased seedlings. This is the first cause of premature senescence.

Preventive measures: When purchasing seedlings, first understand the condition of the seedlings and whether they come from an epidemic area. Second, choose robust new seedlings. If they are old, weak, diseased, or inferior seedlings, they must not be used. For diseased seedlings, spray pesticide for prevention and control before planting.

2. Rushed planting and careless management

Some fruit growers rush to plant without proper planning or land preparation, and do not understand the soil deeply. Some choose sandy soil that drains water and leaches fertilizer, or soil that is too compacted, all of which can cause premature senescence of Nian Ju later on.

Preventive measures: Do preparation work before planting, choose good planting land, and after land preparation and fertilization, plant at a reasonable density, generally 90-100 plants per mu. If soil fertility is average, planting can be appropriately sparser to ensure robust growth.

3. High groundwater level

For farmers planting in paddy fields, because some paddy fields drain poorly, after several years of planting the root system extends into the groundwater. The roots, soaked in water for a long time, develop root rot, which leads to yellowing leaves and premature senescence. However, some farmers think it is caused by fertilizer deficiency and increase the amount and frequency of fertilization, only to find it is all in vain.

Preventive measures: Water management should be done well. Grasp the growth characteristics of citrus and manage water differently as the seasons change. In orchards with a high groundwater level, drainage ditches must be dug well to drain water and reduce waterlogging in time. In mountainous orchards, ring ditches should be opened well to prevent mountain floods from washing away soil and causing soil erosion.

4. Phytotoxicity

Some farmers, in order to start weeding, use large amounts of herbicide year after year, causing phytotoxicity in Nian Ju and triggering premature senescence.

Preventive measures: Apply more organic fertilizer and phosphorus-potassium fertilizer to improve the plant's stress resistance and disease resistance. Use herbicides as little as possible, and when using them, pay attention to the dose and concentration. Use biological control methods to prevent and control pests and diseases, and produce green fruit.

The above is an introduction to the causes of premature senescence in Nian Ju and preventive measures. We hope it can help you. To learn more related knowledge, please stay tuned to us,