It is well known that potassium fulvic acid, a mineral source, has the function and effect of improving crop stress resistance. So precisely speaking, what are the specific functions and effects of mineral potassium fulvic acid in improving crop stress resistance? In the following content, this article will systematically explain all this to you in detail.
The role and effect of mineral potassium fulvic acid in improving crop stress resistance can be divided into three points: (1) improving crop drought resistance (2) improving crop cold resistance (3) improving crop disease resistance. This article first focuses on improving crop resistance. Drought resistance and elaboration.
Fulvic acid substances play a huge role in mitigating agricultural drought damage. Although fulvic acid products produced by different sources and manufacturers have different effects on crops and the degree of impact on crop anti-transpiration, However, a large number of test results show that the mechanism of action is basically the same.
1. Reduce stomata opening and reduce water transpiration.
According to experiments conducted by scientific researchers, wheat showed obvious drought resistance after spraying potassium fulvic acid from mineral sources. Further observation proved that the stomata width could be reduced by 72.7% two days after spraying, and the total transpiration on the 9th day was reduced by 13.7% compared with the control. The soil The moisture content increased by 1.5%. Continuous observation of the results showed that the effect of reducing stomatal opening after application lasted for more than 12 days and basically disappeared by the 13th day. The researchers also used test results to further verify the anti-transpiration mechanism of mineral potassium fulvic acid. They sprayed different concentrations of potassium fulvic acid from the mineral source during the booting stage of wheat and found that as the dosage and concentration increased, the stomata opening decreased accordingly and the duration of the effect also extended, up to 22 days. Generally, as the drug concentration increases, the inhibition of stomatal opening becomes stronger. However, if the stomatal opening is too small, it will hinder the absorption of carbon dioxide and affect the photosynthesis of plants. Therefore, it is very necessary to determine the appropriate concentration.
2. Promote root development and improve root vitality.
When wheat is used for seed dressing with mineral potassium fulvic acid, the number and length of secondary roots are significantly increased. This effect can last from the seedling stage to the overwintering and greening stages. Field investigations show that the plants grown under seed dressing grow vigorously, have an increased root-to-shoot ratio, delay the senescence of lower leaves, maintain more green leaves, increase photosynthetic area, and increase dry matter accumulation.
According to research reports, mineral potassium fulvicate also has a significant effect on the growth and vitality of root systems of corn, rice, peanuts, sweet potatoes, etc. When corn is seed-dressed with 0.5% fulvic acid, the average root length increases by 3.7 cm, the number of roots increases by 1.4, and the dry matter weight increases by 1.46 g, thereby increasing the absorption of nitrogen, phosphorus, and potassium in the soil. It is effective regardless of seed dressing, seed soaking or spraying.
3. Effect on soil water holding capacity.
Spraying potassium fulvic acid from mineral sources inhibits crop transpiration, slows down soil water consumption, and increases soil moisture content accordingly. In addition, potassium fulvic acid from mineral sources has the effect of improving soil structure, which is beneficial to maintaining soil moisture balance and saving water. The role of moisture conservation can help crops survive drought periods smoothly.
The above is an explanation of mineral potassium fulvic acid improving the drought resistance of crops. I hope it will be helpful to you.