Special selenium-rich foliage fertilizer for winter jujubes, and preparation method and application method thereof

Abstract

The invention discloses a special selenium-rich foliage fertilizer for winter jujubes, and a preparation method and application method thereof. The fertilizer is composed of the following components in percentage by weight: 0.8-1.0% of sodium selenite, 5.0-10.0% of potassium pyrophosphate, 0.5-1.0% of sodium dodecyl benzene sulfonate, 1.0-2.0% of triton X-100, 1.0-2.0% of dodecyl betaine and 85.0-90.0% of water. By using the foliage fertilizer disclosed by the invention, the selenium content in the winter jujube fruit reaches 50-100 mu g / kg; no phenomenon of excessive selenium intake can be caused as long as the everyday intake amount does not exceed 2.5kg; and the selenium supplementation amount is in the proper range when the intake amount does not exceed 1.0kg. In daily life, the everyday intake amount of the winter jujubes for an adult generally does not exceed 1.0kg when the winter jujubes are used as fresh fruits. Therefore, the selenium-rich winter jujubes produced by the special selenium-rich foliage fertilizer are very safe to eat.

Description

technical field [0001] The invention belongs to the field of agricultural fertilizers, and in particular relates to a special selenium-enriched foliar fertilizer for winter jujube and its preparation method and application method. Background technique [0002] Dongzao is a high-quality fresh jujube variety unique to my country, which is favored by people because of its rich nutrition and good taste. Through the application of exogenous selenium, the fruit is enriched in selenium, and then absorbed by the human body through the food chain, it can significantly improve the human body's immunity and achieve the purpose of anti-cancer and anti-aging. Due to the narrow range of human body's demand for selenium, excessive intake may lead to poisoning, and the health effect of selenium cannot be exerted if the amount is too small. Therefore, the selenium content of fruits should be strictly controlled in the production process of selenium-enriched winter jujube. [0003] According...

AI Technical Summary

Problems solved by technology

But present selenium-enriched foliar fertilizer has the following disadvantages: the leaves of winter jujube are relatively small and have a waxy leaf surface. After the selenium solution is sprayed on the leaves of winter jujube, it will roll off the leaves in a short period of time. The attachment time on the leaf surface is short, and selenium is difficult to be fully absorbed by the leaf surface, resulting in too low selenium content in the fruit

Due to the inability to coordinate the increase in the amount of selenium in the fruit and the concentration and amount of spraying selenium-containing foliar fertilizers, although the selenium content in the fruit can be greatly increased by increasing the amount of selenium, it is prone to dead leaves, fallen leaves, and black spots on the fruit , which will adversely affect the growth of the tree and the commodity value of jujube fruit

In order to avoid the damage of selenium to the tree body and fruit caused by excessive selenium concentration in a single fertilization, multiple low-concentration sprays can be used, but if the low-concentration selenium solution is sprayed multiple times during the growth period of winter jujube, it will inevitably increase the amount of selenium. Manpower and material resources are invested, the operation is cumbersome, and it is difficult to determine the relationship between the concentration of each spray and the number of sprays

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