The role of potassium dihydrogen phosphate (MKP) can promote the absorption of nitrogen and phosphorus by fruit trees and other crops, promote photosynthesis, improve crop resistance, improve fruit quality, and regulate crop growth. So, what are the effects and functions of potassium dihydrogen phosphate (MKP) ? Do you know the application method and precautions? Let's take a look together below.
Efficacy and effects of potassium dihydrogen phosphate (MKP)
Potassium dihydrogen phosphate (MKP) is a phosphorus-potassium compound fertilizer containing 51.7% phosphorus pentoxide and 34.6% potassium oxide. Its appearance is white crystals, acidic, tasteless, non-volatile, non-deliquescent, stable in nature, easily soluble in water, and easily absorbed and utilized by plants. In production, it is mainly used for seed soaking, seed dressing and foliar spraying.
1. Seed soaking and seed dressing: Soaking or dressing seeds with potassium dihydrogen phosphate can stimulate seed germination and promote strong seedlings and roots. The stems are strong, upright and resistant to lodging.
2. Dip the roots of the seedlings: Mix potassium dihydrogen phosphate with dry fine soil, add water to make a slurry, and plant with roots when transplanting.
3. Foliar spray fertilizer: use its foliar spray fertilizer, and the fertilizer directly enters the crop body to make up for the lack of phosphorus and potassium nutrients, enhance photosynthesis, prevent premature crop aging, improve resistance to low temperature and high temperature, and promote the synthesis of starch and sugar Accumulate, increase seed setting rate, 1000-grain weight, reduce empty shells, and achieve the purpose of increasing production. Used on flowers such as crab claw orchids, the leaves are thick, which can destroy flowers, accelerate budding, explode more leaves and bloom more.
The correct application method of potassium dihydrogen phosphate (MKP)
1. Concentration. When the concentration is 25-20 times, potassium dihydrogen phosphate (MKP) irrigation has an inhibitory effect on tomato seedlings. If it is lower than 20 times, burning seedlings will occur. It is proved that if the concentration of potassium dihydrogen phosphate (MKP) is too high, it will cause fertilizer damage.
The irrigation multiple of potassium dihydrogen phosphate (MKP) can be 1000 times or 2-3 kg per mu (depending on the condition of the base fertilizer).
2. The use period of potassium dihydrogen phosphate (MKP) is when the crop has a large demand for phosphorus and potassium absorption. This thing can't be used often, too much, just choose the right period and the right amount.
3. The specific use time and recommended concentration of various crops for foliage spraying.
Precautions for using potassium dihydrogen phosphate (MKP)
1. The effective period of spraying is the peak period when the crop absorbs phosphorus and potassium, such as the booting or heading and flowering period of wheat, rice and other cereal crops; the moss period to the flowering period of rape; before and after flowering of cotton; Block expansion period and so on.
2. Control the spraying time. Do not spray on rainy days, morning dew, and noon on sunny days. It is better to spray before 10 am and after 4 pm on cloudy days. Spray all day long.
3. When spraying, make the front and back of the leaf more fertile. Don't walk too fast, but evenly.
4. Promote reasonable mixed application of potassium dihydrogen phosphate (MKP) and some nitrogen fertilizers, micro-fertilizers and pesticides, which can save labor and increase fertilizer efficiency and medicine efficiency. Mixed application is carried out in fields with poor crop growth and lack of nitrogen, phosphorus, and potassium. Generally, the appropriate concentration of urea solution is required to be 1% to 2%; in crops that lack boron and are effective for boron fertilizers such as cotton, rape, wheat, etc. For crops, the mixed application of potassium dihydrogen phosphate and boron fertilizer has a significant effect on increasing yield, and the concentration of boron fertilizer is 0.1% to 0.2%. Potassium dihydrogen phosphate can be mixed and sprayed with non-alkaline pesticides, or mixed and sprayed with regulators.
5. Potassium dihydrogen phosphate (MKP) promotes the reproductive growth of plants. It is not suitable to be applied during the plant nutrition stage to avoid phytotoxicity and waste.
6. Correctly judge the lack of phosphorus and potassium in plants. Because the two elements of phosphorus and potassium have a high degree of fluidity in the body, they often appear on old leaves and flower stems when they are lacking. Under normal circumstances, when a plant lacks potassium, the basal stem leaves are variegated or lacking green, the leaf margins are cupped or curled, there are necrotic spots between the veins, or the tip and edge of the leaves, and the stems of the plants are weak; In severe cases, the plant is dark in color, red or purple in length, yellow in the base leaves, short and thin stems, and the veins of the tender leaves are chlorosis.
7. In addition, foliar spraying is only a supplement to plant fertilization, and must not replace base fertilizer and root topdressing. Plant roots have greater absorption capacity and absorption system. However, the absorption of leaves does not depend on the absorption of roots. Therefore, foliar fertilizer and root fertilization are cleverly combined to achieve higher benefits.