Winter jujube flowering fertilizer and water management

Spraying micro-fertilizers and plant growth regulators during flowering and spraying plant growth regulators, micro-fertilizers and other substances are necessary measures to promote fruit setting. Such as spray gibberellin (920), Zao Feng Ling, borax, urea, etc., have a significant effect on the improvement of fruit set rate, the use of the above mixed materials, the effect is better.

1, Gibberellin due to historical reasons, the use of gibberellin (920) during flowering, if used properly can still be effective. The usage is to spray 100 kg of whole trees per gram of gibberellin. Local experience shows that the use of gibberellin during the flowering period has one drawback. It is the beginning of more fruit set-up, which will consume too much tree nutrients and easily exceed the tree load, resulting in a large number of fruit drop. Mainly in two aspects, the first is that gibberellin can promote the stigma elongation of flowers, is conducive to pollination, which can improve the fruit setting rate; followed by gibberellin can promote the formation of seedless fruit of jujube fruit (fruits fall off The young fruit, most of which is not long-term development of this part of seedless young fruit).

In addition, the use of gibberellin several times, there will be two side effects: First, the date jujube hanging jujube has the characteristics of secondary growth, when the young fruit development to the size of mung bean, the jujube hanging where it will continue to Extend and grow. At this time, the use of gibberellin will also promote faster growth of the leaves, affect the development of young fruit, causing a large number of young fruit off! Use gibberellin should not exceed twice, otherwise it will cause fruit drop. The more the number of use, the more fall; Second, the young fruit after repeated use of gibberellin will make the determination of jujube fruit worse, seriously affecting the taste and commercial value of late winter jujube.

In order to overcome the shortcomings of gibberellin and prevent fruit drop, flowering time promotes the use of two gibberellins (920), and then Zaofengling can be used once again to “assume escort” to ensure that most of the jujube fruit that has been sitting on does not fall off.

2. Zaofengling is a fruit set technology for perfecting red dates. Since the early 1990s, we have successively developed Zaofengling series of products. The study was expertly appraised and reached the leading level in the country, and obtained the scientific and technological progress award. The products have been applied for many years in Hebei Province, Shandong Province, Tianjin and other key jujube areas, and their efficacy has been stable. The masses have responded well.

The method of using Zaofengling during the flowering period: using Zaofengling No.1 (specially used for flowering young fruit period), 1 gram of water and 50 jins of whole trees are sprayed for 3 consecutive times with an interval of 5 to 7 days. Zaofengling No. 1 is not as fruitful as gibberellin, but it also has a lot of fruit drop. It promotes a moderate number of fruit set, but the young fruit period falls particularly low, which ensures the final fruit set rate of winter jujube. Zao Feng Ling No. 1 also has an inadequacy, that is, it seems that there are few points in the beginning of fruiting. People do not feel relieved about this, and are afraid that they will not be dated later. Practice has shown that this concern is not necessary.

3, the use of two or more than two regulators mixed because of jujube fruit set than the average red dates difficult to set fruit, through research in recent years to promote the fruit set technology of winter jujube has made some new progress, is to adjust the growth of two or more plants Mixed use of agents, or mixed with other substances, the effect is much higher than the use of a single regulator. If the gibberellin is mixed with the current Zaofengling, it can ensure that the fruit set in the early stage is more satisfying, the masses are satisfied, and the young fruit that has been seized can be prevented from falling off. These two kinds of regulators can complement each other and complement each other! The method is to use 1 gram gibberellin plus 2 grams of Zaofengling (specially used in flowering stage or middle and later stage) to spray 100 pounds of whole trees on the water and use it twice, and only use Zaofengling No. 1 and No. 2 for the third time. Fruit protection. From the current point of view, this method as long as the flowering temperature is normal, open on schedule, the effect is more ideal, generally meet the fruit setting requirements.

In recent years, we applied Zaofengling No. 1 and No. 2 and adjusted its original formula to introduce Zaofengling No. 5, also known as gibberellin companion. When this formula is used, it is also 2. After the gibberellin mate (Zaofengling No.5) was directly opened with water, it was mixed with 1 g of gibberellic acid (wine boiled with water), and then 120 kg of water was sprayed on the whole tree until the leaves were drip-free.

When the regulator (such as zaofengling or gibberellin) is mixed with boron, it is best to use boric acid (borax is alkaline), mixed with urea, etc., can also increase the efficacy. The specific spraying time should be selected to be clear and windless after 5pm.

Fourth, flowering spray season if it encounters high temperature and dry weather, it will affect pollination and fertilization. In order to prevent decals and increase air humidity, it is advocated to spray water at flowering stage. The number of water sprays is determined according to the degree of drought in the weather. Normal years are sprayed 2 or 3 times, and severe droughts are sprayed 3 to 5 times a year, with an interval of about two days. Water spray can be used as a single spray, which can also be used when spraying a conditioner or pesticide.

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