Application of Plant Growth Regulator in Peanuts

- Apr 05, 2018 -

1.Peanut of regulation development

(1) Paclobutrazol

Use 50-100mg/L paclobutrazol solution for seed dressing, soak the seeds, stuffy 1H dry after sowed in the field. It can regulate the growth and development of peanut seedlings. The specific performance is to promote the internode shortening, plant height, branching, root system development, root activity increased; the leaf chlorophyll content and photosynthetic rate increased significantly. This is very beneficial for the robust growth of peanuts in the middle and later stages, and the reduction of the resulting parts and fruit needles into the soil. As the hypocotyl shortening after seed dressing is more, the sowing should not be too deep, so as not to affect the emergence or delayed emergence. The seeds soaked with peanuts can be used in the wheat set of peanuts.

The proper application period of paclobutrazol solution is a key issue for peanut production increase. If applied too early, it will reduce production. For example, the full flowering period of peanuts is a period when vegetative growth and reproductive growth go hand in hand. During this period, paclobutrazol is applied. I do not know how to inhibit the growth of stems and leaves, but also to inhibit flowering, resulting in less formation of fruit needles. If paclobutrazol is sprayed on the lower needle stage, the elongation of the fruit pin is inhibited, the needle is short and the fruit is fine, the number of full fruit is affected, the fruit weight and the kernel weight are heavy, and the yield is decreased. Late use, no increase in production. For example, the number of pods in the fruiting stage has been fixed, and the weight gain of the pods is also ending. The application of paclobutrazol to increase yield is not significant or even. The most appropriate period of application is when a large number of fruit needles enter the soil. At this time, the fruit of the first phase of the soil injection is as thick as the stem, and the second batch of fruit needles is like a chicken mouth. The pin down period of spring peanuts is about 26-29 d after flowering, and the down needle period of autumn peanuts is 14-20 d after flowering. During this period, the sap vegetative growth was vigorous and sufficient number of pods had been formed. The development of pods had a certain foundation and the potential for the accumulation of sufficient products was still great. The application of paclobutrazol in this period can not only restrain the stems and leaves from being long, shade and lodging, but also can concentrate the photosynthetic products to the young cubs, because the cubs in this period are the growth centers, organic substances are input in large quantities, and the seats increase fruit filling. Number and weight, increase production. Similarly, the optimal period for applying other growth retardants is based on this principle.

 (2)Brassinolide

With the concentration of 0.01 ~ 0.1mg/L brassinolide soaking, can improve germination rate, promote the growth of peanut seedlings, and also can improve the cold resistance of seedlings, prevention of springpeanut often affected by "late spring coldness" impact caused by lack of seedling.

Application of Plant Growth Regulator in Peanuts 00.jpg

2. Improve the resilience of peanuts

(1)Paclobutrazol

Using 100-200 mg of paclobutrazol solution to spray 5-6 leaf-leaf peanut plants. After 11 days, watering was stopped and the soil gradually became dry. After 40 days, the soil moisture content decreased to 41%. This is the determination of various indicators, compared with the control, paclobutrazol treatment can promote root growth, and increase root water absorption, absorption capacity; leaf inside the volume of water storage cells increased, transpiration rate decreased, leaf water content increased. The above anatomical and physiological features are conducive to enhancing cold resistance. Therefore, spraying paclobutrazol can improve the drought resistance of peanuts.

(2)Chlormequat (CCC)

In 75-300 mg/L CCC solution of dealing with the three periods of peanuts, then dry processing. The experiments showed that the love-transplanted bone marrow could increase the content of endogenous abscisic acid in peanut seedlings under drought stress, and 150 mg/L treatment was the most significant. In addition, it can also increase the activity of the protective enzyme that protects oxygen free radicals from damage in the plant and leaves the cell membrane less vulnerable to drought. Therefore, the water content of the leaves is higher, which shows that the treatment of chlorocholine can improve the anti-drought ability of peanut seedlings to some extent.

Application of Plant Growth Regulator in Peanuts 01.jpg

3. Increase production

(1)Uniconazole

In understanding through two years of olefinic effect azole experiment, it was shown that the drug can reduce plant height, promote thick stems, thick leaves, and deep color, promote the transport of photosynthetic products to pods and kernels, increase yield and appropriate concentration, and increase the yield. More than 10%.

Using 1 mg/L and 5 mg/L Uniconazole Solution to soaked 8h at room temperature can make peanut seedlings dwarf, root system developed, branches increased, chlorophyll content increased, dry matter accumulation increased. With Uniconzole dressing 60mg/L, can significantly improve the yield traits of peanut, peanut protein content increased the pod yield.

(2)Triacontanol

Soaking 11h with 0.1mg/L and 0.5mg/L triacontanol can improve the germination potential of the seeds, promote the seedlings and seedlings, and the seed soaking concentration is best with 0.1mg/L.

4. Promote high fruit needle develop into pods

The elongation of peanut fruit needle is regulated by plant growth regulators. The growth of fruit needles is regulated by auxins, gibberellic acid, furfurylaminopurine (kinetin), zeatin, abscisic acid, ethephon and chlormequat(CCC), and the elongation of fruit needles is measured regularly. The results showed that gibberellin and auxin promoted the elongating growth of fruit needles, especially gibberellin, furfuryl amino purine and zeaxanthin. The  Low concentrations of abscisic acid and ethephon have a promoting effect, but high concentrations show inhibitory effects.

Application of Plant Growth Regulator in Peanuts 03.jpg

5. Control flowering

1. Ethephon

Peanuts have more pods, fruit grain, full fruit less. Therefore, we must try to control the late flowering and flowering or non-blossoming so as to reduce nutrient consumption and create conditions for multiple knots and knots. Ethephon is a strongly acidic liquid, which releases ethylene in plants. Ethylene is a plant hormone. The test was carried out with 200 mg/L ethephon solution sprayed 20-40 d after flowering. The results showed that spraying 25 days after flowering was better, and the flowering amount was reduced by about 75% compared with the control group at the same period. If it is too late, the control of flowering will be small after the flowering period. Each treatment had a certain inhibitory effect on the vegetative bodies. The plants were tall and straight, tough, and the leaves were dark. However, after 20 days, the drug strength disappeared, the plants returned to normal growth, and there was a phenomenon of “turning green”, which affected the filling of the late pods and reduced the control of flowers. effect. This phenomenon may occur due to the high concentration of the drug .

6. Delaying the aging of peanut leaves

According to the results of the study results show that the 3.5 mg/kg gibberellin, 11.3 mg/kg of 6-Benzylaminopupine and 867 mg/kg of Ethephon can significantly increase the chlorophyll content, and also improve the ability to resist peroxide, reduce the toxic substances content and delay senescence. Gibberellin and 6-Benzylaminopupine can increase production.

 

 


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