In spring, when the weather gets warmer, it suddenly turns cold and even appears frost. This phenomenon is called “cold spring.†Wheat is vulnerable to frost damage in the early stage of returning green crops, and the yield of affected wheat is reduced by 10% to 30%, and the weight is more than 50%. Therefore, we must strengthen management and pay attention to prevent freezing of wheat.
The morphological characteristics of wheat after freezing
After the wheat ears were damaged by freezing, the tips of the top one of the plant's veins were whitened, and there was no heart and leaves. The leaf sheath was peeled off layer by layer, and counted from the bottom. The second bud was folded. It was soft and dull and seemed to be hot. If section 2 no longer elongates, it indicates that the stem growth point has stopped growing. The spike axis was green and white, and the spikelets were milky white, arranged loosely, dehydrated and wilt, and died after yellowing.
Pre-disaster preventive measures
Classification management should combine the characteristics of the seedlings and weather changes to guide the classification of wheat fields, strengthen field management, and improve the cold resistance of plants. For excessively prosperous wheat fields, “control†should be adopted, and measures such as repression, squatting, and spraying plant growth regulators should be adopted to suppress the excessive growth and development of wheat, avoid premature jointing of wheat, and improve cold resistance. Improve wheat lodging resistance. For the first time in the spring wheat field, it can be postponed until late or before and after jointing.
For the general wheat field, it is necessary to “enhance and control the combinationâ€, first to suppress, and then to shallow cultivator, in order to achieve the effect of warming and keeping warm. Appropriate top-dressing watering, promote the growth of tillers, and strive for more than a spike. For the weak seedling field, we must focus on "promoting", try to plan early, increase the ground temperature, increase the number of hair roots, pay attention to the importance of planning, and avoid injury. After going back to the green, it is necessary to combine topdressing with quick-acting nitrogen fertilizer. If the weak Miaotian is well-received, we should avoid watering early spring to avoid lowering the ground temperature. Generally, topdressing and watering are carried out during the late period of returning to the green period or in the early stage of getting up.
Watering before freezing is one of the most effective measures to prevent late spring. Before the arrival of strong cold weather, wheat fields that are at risk of freezing must be watered in time to regulate the microclimate near the ground, which can significantly reduce the freezing damage.
Addition of organic fertilizer in the jointing stage of wheat, adding some organic fertilizer and phosphate fertilizer, potassium fertilizer, in order to promote root development, inhibition of the aboveground part of the wheat seedling growth, and enhance cold resistance.
Spraying regulators Before the arrival of the spring cold, foliar sprays such as “Blue Crystal Code†or “Nongxi 10 Lexin†and other nutrient regulators can improve plant immunity and ability to fight various disasters, and reduce hazards.
Post-disaster remedial measures
Compensatory fertilizer and watered wheat are crops with tillering characteristics. Wheat fields that suffered from cold damage in early spring will not freeze all of them, and small axillary buds may grow into long panicles. As long as the management is strengthened, a good harvest can still be obtained. Wheat that suffered from frost damage in early spring should be immediately applied with available nitrogen fertilizer and watering. The synergistic effect of nitrogen and moisture will promote the early tillering of wheat and small borers, increase the percentage of tillers per panicle, and increase the panicle number per acre, thus reducing the loss of freezing damage. . Generally, about 10 kilograms of urea is applied to each acre.
The cultivator protects the ground temperature, increases the number of tillers, and obtains a good harvest.
Spraying foliar wheat with foliar spray was promptly sprayed with foliar spray of “Nongxi liaoyusu†plus nutrient regulator or multi-resistance and production increase agent, which had a significant promotion effect on the recovery of wheat. The rapid growth of small tillers and the rapid growth of latent shoots.
Pest and disease control Frozen wheat fields are more vulnerable to pests and diseases and should be controlled in time. The control of wheat sheath blight, powdery mildew and rust can be sprayed with 80% ilicin + "benzocycloxazole" or "tebuconazole".
Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone
Small breast sex doll and flat breast sex doll is most popular in the market.
Those who like A Cup, B Cup, C Cup, will find their favorite sex dolls here, they will meet all your requirements and sexual fantasies.
Perfect simulated technology:
The internal structure of vagina is completely carried on according to the reality, with a g-spot, countless fold and protuberance.There is a spikes of uterus in the tail ,increased stimulus, real sex appeal.
Vagina structure: The vagina is arising from the mud draft made by the master with 40 years of experience engaged in the wax statue carving,so it is very realistic.
flat chest sex doll,sex doll flat chest,life size flat breast sex ,mini love sex doll,small cup Silicone Sex Doll,cute little girl sex doll.
Real Silicone Doll,Small Breasts Sex Dolls,Realistic Small Breasts Sex Dolls
Dongguan Chenkuang Biological Technology Co., Ltd , https://www.cksexdoll.com