Method for supplementing selenium for tobacco in seedling period

Abstract

The invention relates to a method for supplementing selenium for tobacco in the seedling period. The method is characterized by comprising a step of adding a nitrogen-phosphorus-potassium fertilizer in a nursery pond according to the conventional seedling culture method, and also comprising the following operating steps of a) supplementing selenium for tobacco seedlings in the sowing period; and b) supplementing selenium for the tobacco seedlings in the cross-shaped period. According to the law of absorbing nitrogen, phosphorous, potassium and selenium by the tobacco seedlings, nutrients are reasonably matched, the quality of the tobacco seedlings is obviously improved, the dry weight of a root system and the root shoot ratio are obviously improved, the root activity and the photosynthetic capacity of leaves are enhanced, and the stress resistance is obviously improved. The selenium content of the overground part and the root system is increased by 8.3-21.7 times and 47.4-83.0 times respectively when the tobacco seedlings emerge, the selenium content of the tobacco is improved by 32.7-90.3 percent after the tobacco is ripe and is cured, the high-quality selenium-enriched tobacco is produced easily and conveniently and the method is suitable for promotion and application.

Description

technical field [0001] The invention relates to a method for supplementing selenium of tobacco leaves at the seedling stage. Background technique [0002] China is rich in total selenium resources, and its industrial reserves rank fourth in the world. However, due to the uneven distribution of selenium resources, 72% of my country's areas are in a selenium-deficient and low-selenium ecological environment. Among them, from the three northeastern provinces to the Yunnan-Guizhou Plateau, about 2 / 3 of the main crops contain less than 0.05mg / kg, which is an internationally recognized selenium-deficient area. In 2011, my country's tobacco planting area was 18.58 million mu, most of which were selenium-deficient in the soil of the tobacco-growing areas. Smoking is harmful to health, and increasing the selenium content of tobacco leaves can effectively reduce the content of major harmful components such as cigarette tar toxicity and free radicals, and reduce the harm of smoking to...

AI Technical Summary

Problems solved by technology

Although the selenium supplement method of the above method can increase the selenium content of agricultural products, there are problems such as complex fertilizer production process, difficult operation, high cost, etc., and it is still difficult to apply and promote, and there is no good selenium supplement method on tobacco leaves