Ministry of Agriculture experts questioned: the use of plant hormones strawberries in the end can eat?

BEIJING, March 1 (Xinhua) -- Strawberries are fresh, juicy, nutritious and popular with consumers. At present, when the spring strawberry market, some "hormonal strawberries" "puffed strawberries" rumors began to spread, especially "plant hormones" caused by "child sexual precocious" and other statements are causing everyone to be at risk. Recently, Xinhuanet interviewed Wang Qiang, director of the Agricultural Product Quality and Safety Risk Assessment Laboratory (Hangzhou) of the Ministry of Agriculture, who answered in-depth questions about whether strawberries need to be grown without the need to use plant hormones, and whether strawberries that have used plant hormones can eat them in the end.
plant hormones do, does strawberry cultivation require plant hormones?
Wang Qiang said that plant hormones can regulate the growth and development process of plant flowering, mature aging, sleep germination and so on, there are two sources of endogen and external sources. Plants themselves synthesize hormones during growth and development. At the same time, due to climatic reasons, sometimes plants themselves synthesize insufficient endogenetic hormones. In order to ensure the normal growth and development of plants, it is necessary to artificially add trace substances the same or similar to plant endogenous hormones to compensate for the deficiency of endogenous hormones, which are called plant exogenous hormones or plant growth regulators.
Strawberries have endogenetic hormones that regulate their own growth, and in most cases, strawberry production can rely on endogenetic hormones synthesized by strawberries to regulate growth and development, and achieve high-yielding and high-quality goals through varieties, cultivation, fertilization, disease prevention and treatment. However, when the endogenetic hormones secreted by strawberries themselves, such as persistent low temperature or continuous rain, cannot meet normal flowering results or maintain a good appearance, it is necessary to use plant exogenetic hormones, such as erythromycin to promote growth, multi-effect palladium to control the length of the person, and S-induced anti-pigment to promote coloring.
there a safety effect on the use of plant hormones?
Wang Qiang said that the rational use of plant hormones on product safety has no impact.
, the use of plant hormones is an internationally accepted agro-measure. Plant hormones, as a technical measure of high-yield, high-quality and efficient agriculture, have been widely used in the world, including the United States, the European Union, Japan and other developed regions, such as ethylene, erythromycin, acetic acid, pyridine, polysacin, dwarfs and other crops used in fruits, vegetables, potatoes, soybeans and so on.
data show that a total of 55 plant hormones have been registered for use in China, and 113 maximum residue limit standards for 19 plant growth regulators have been formulated, and 4 exemptions have been established for residual limits (due to low toxicity without the need to set limits).
second, agricultural products that have used plant hormones are safe for consumers. First, because compared with other pesticides, plant hormones, although included in the scope of pesticide management, but not in the traditional sense of disease control insect weeding pesticides, its products belong to low microtoxicity. Second, because the amount of plant hormones is small, such as excessive use is counterproductive, farmers can not be used in large quantities, so plant hormone residues are very low. Third, the risk of dietary exposure of plant hormones is very low, the evaluation results show that the dietary exposure of 21 plant hormones are basically less than 1% of the safe reference dose;
, plant hormones and animal hormones are two concepts that cannot be confused. When hormones act on cells, there must be a specific protein in the cell that binds to them, called hormones. There are no plant hormones in the human body, plant hormones on our body can not play a regulatory role. Therefore, people are worried that the intake of plant hormones, will be "sexual precocious", "fat", "endocrine disorders", such a situation is impossible to happen. Similarly, animal hormones do not work with plant cells and cannot be used in fruit and vegetable production.
the use of plant growth regulators, will cause strawberries to be oddly large, hollow or deformed?
Wang Qiang thinks that strawberry fruit is big or small, fruit hollow or solid, thick or thin, fruit type is prone to deformity, whether there is aroma, in fact, are variety characteristics. In recent years, relying on the national agricultural product quality and safety risk assessment of major special projects, carried out a series of experimental results show that:
first, puffing agent on the fruit does increase weight gain, but this effect is limited. After testing on cucumber, tomato, strawberry, grape, poplar and other crops, plant growth regulators increased the weight of single melon fruit by less than 30% on average after use on melon fruit, which is unlikely to achieve a very large effect.
, strawberry hollow is mainly the characteristics of varieties, plant growth regulators can not change the characteristics of this variety. The hollow ratio and hollowness of different varieties of strawberries vary significantly, and some strawberry varieties such as Sweet Charlie, Dashanka, Ducla and so on have the characteristics of hollowness in the middle of the fruit.
, strawberry malformation is mainly pollination, lighting, temperature and other reasons, and plant bio-growth regulators have no significant relationship. When the fruit meets the low temperature when the buds differentiate, it is easy to produce deformed flowers, and then develop into abnormal fruit. Some varieties of melon fruit in the specific production, climate conditions, such as uneven water supply, rain alternate, high and low temperature alternate can increase the proportion of malformed melon fruit is a natural phenomenon. The results of the 2016 simulation showed that the average weight and deformity rate of strawberry fruit did not increase significantly after the use of clopidoxin.