-
Wheat Faces a Warm Winter, with Increased Risk of Freeze Damage and Drought
Wheat Faces a Warm Winter, with Increased Risk of Freeze Damage and Drought According to a report from the National Climate Center, the 2014 El Nino phenomenon has escalated again and is expected to peak in December, and northern China may see a warm winter this winter. At present, in China's Huang-Huai-Hai wheat region, wheat sown before October 7 is growing noticeably well; if a warm winter occurs, there is a clear trend toward excessive growth, especially in the southern Huang-Huai wheat region, where the risk of excessive wheat growth and winter-spring freeze damage is markedly increased. In the Heilonggang River basin and in Dezhou, Heze and other places in Shandong, because the land is saline-alkali, wheat emergence is poor; especially in areas with annual precipitation of only 500-600 mm, where wheat and corn are double-cropped in 1 year and there is no adequate irrigation, the risk of wheat encountering drought stress during a warm winter increases.
-
Can fresh jujubes be frozen for storage? The correct storage method tells you
Jujube is a kind of jujube, it tastes sweet, and there are quite a few ways to eat it. We can eat jujubes fresh, wash them clean and eat them directly, or dry them, and after drying they can also be eaten directly. However, fresh jujubes are relatively not
-
Can fresh jujubes be preserved by freezing? Methods for preserving fresh jujubes
Fresh jujubes can be frozen. Frozen jujubes can be used to make fruit salad or to cook porridge; they are not only crisp in texture but also fresh and sweet, and even after the jujube season has passed you can still eat fresh jujubes to supplement vitamins. Fresh jujube
-
How to Protect Winter Vegetables from Freezing? A Detailed Guide to Practical Protection Methods
In winter, crops and vegetables are also afraid of the cold. How can we ensure the normal growth of crops in winter? Freeze protection measures for greenhouse vegetables. 1. Strengthen covering. Build small arched tunnels inside the greenhouse, using thin bamboo poles etc. as arches, cover with film at night, and cover the film with straw mats; cover the ground inside the greenhouse with plastic film to increase temperature and retain moisture. Use plastic film as a skirt around the bottom inside the greenhouse, which can significantly reduce the invasion of cold air at the bottom; at the same time, pay attention to plugging gaps in the greenhouse to minimize heat loss through gaps.
-
This year temperatures are on the low side, how should wheat be protected from freezing?
According to the weather forecast, this year is a year with extremely low temperatures, so this winter may be very cold, and therefore extra attention should be paid to protecting wheat from freezing. Take care to help wheat suffer less from the harmful effects brought by the weather. So how should wheat be protected from freezing? Symptoms of wheat freeze injury
-
What are the technical measures for protecting flowers and nursery stock against snow and freezing?
In order to reduce the impact of heavy snow and strong cold air on flower and nursery stock production in our city, and to minimize losses from snow damage and freezing damage, all production units and flower growers should focus on the following three aspects of work: 1. Greenhouse management: do a good job of reinforcing greenhouses and removing accumulated snow.
-
How to prevent frost damage in plum trees? Key technical points for frost prevention when growing plum trees
Frost injury and freeze damage refer to the phenomenon in which the soil and plant surface temperatures drop to 0°C or below 0°C for a short time at night during the growing season, or when frost occurs, causing damage to the young and tender parts of fruit trees. In China, the average annual area affected by frost damage reaches 340,000 km2, and in the worst year it reached 7
-
How to Take Emergency Protective Measures When a Navel Orange Orchard Suffers Freeze Damage
Reporter Yan Zhangwen reports: With the weather continuing cold and rainy, can navel orange trees withstand it? On the morning of January 28, the reporter conducted a telephone interview with Fang Yiwen, director of the Municipal Citrus Science Research Institute. Director Fang Yiwen, who was observing freeze damage on site, told the reporter that in parts of Ningdu, Yudu, Ganxian and other places in the north and central regions, some navel orange orchards at higher altitudes have already suffered freezing damage, with ice forming on the leaves; as temperatures drop, the freezing line will continue to advance toward the southern areas, posing a greater threat to navel orange trees. According to the weather forecast, the rain, snow and freezing weather will continue until the end of this month, and temperatures will continue to drop. There is no time to lose in doing a good job of protecting orchards against freezing, and Fang Yiwen urged the broad community of fruit growers to immediately implement the following emergency measures.
-
Methods for controlling freeze injury in sweet potato cultivation
Sweet potato freeze injury, also called hard-heart sweet potato. [Disease diagnosis] When storage roots are frozen, at first the skin color shows no obvious difference from healthy roots, only slightly losing its luster. Later, the skin can be seen to take on a slightly dark, lusterless appearance; pressing the frozen part lightly with a finger gives a springy feeling; cutting open a frozen sweet potato shows that the flesh near the skin rapidly turns brown, does not exude white milky sap, and squeezing it by hand releases clear water. Generally, based on the speed at which the flesh turns brown, the degree of freezing can be estimated; the faster the browning, the more severe the freezing. Frostbitten storage roots often form a hard heart, taste bitter, and will not cook soft. After storage roots are frozen, they are easily attacked by weakly parasitic fungi, causing rot. ⟦4 <p>Sweet potato freeze injury, also called hard-heart sweet potato. </p><p></p><p>[Disease diagnosis] When storage roots are frozen, at first the skin color shows no obvious difference from healthy roots, only slightly losing luster. Later, the skin can be seen to take on a slightly dark, lusterless appearance; pressing the frozen part lightly with a finger gives a springy feeling; cutting open a frozen sweet potato shows that the flesh near the skin rapidly turns brown, does not exude white milky sap, and squeezing it by hand releases clear water. Generally, based on the speed at which the flesh turns brown, the degree of freezing can be estimated; the faster the browning, the more severe the freezing. Frostbitten storage roots often form a hard heart, taste bitter, and will not cook soft. After storage roots are frozen, they are easily attacked by weakly parasitic fungi, causing rot. </p><p>[Cause] When storage roots are exposed to a low-temperature environment below 9°C for a relatively long time, their physiological functions are disrupted, the flesh tissue is frostbitten, a hard core forms, and the skin and tissue become necrotic. However, after freezing, a period of time must pass before rotting begins. The lower the temperature, the more severe the freeze injury. The longer the low temperature lasts, the more severe the freeze injury. When storage roots suffer freeze injury, rotting generally has two peaks: one is when harvesting is too late in production and the roots freeze in the field, called freeze injury outside the storage pit, and rotting begins about 15 days after being put into the pit; the other is during the middle and late stages of pit storage, when freezing occurs because the pit is shallow or cold protection and insulation are poor and the pit temperature is low, followed by rotting. Generally, at 4-5°C, rotting begins after lasting half a month, and at 6-7°C, rotting occurs only after 1 month. </p><p>[Control measures] (1) Harvest and put into the pit at the proper time to prevent storage roots from freezing. The suitable harvest time for sweet potato should be when the local average temperature of the ten-day period drops to about 14-15°C. Harvest promptly on a sunny day, and the storage roots should be put into the pit on the day of harvest. (2) Disinfect the storage pit. Before the storage roots are put into the pit, a layer of soil should be scraped from the walls of an old pit, and then chemicals should be used for disinfection: fumigate with 30-40 milliliters of 402 water-based fungicide per cubic meter of space, or spray the walls around the pit with a 50-fold formalin solution; in either case, it must be sealed for two days, then opened for ventilation, and used after another two days. (3) Carefully select storage roots. Any storage roots that are diseased, insect-bitten, or frostbitten by frost should be removed and must not be put into the pit. (4) During harvesting, transport, and pit storage, handle them carefully, lifting and setting them down gently, and prevent wounds as much as possible. (5) Manage the temperature and humidity of the storage pit well. To prevent storage roots from freezing and ensure safe storage, the pit temperature should be kept at 11-13°C and the relative humidity at 75%-80%.</p>
-
How to raise earthworms in winter? Master the techniques of heat preservation and freeze protection
Summary During breeding, cut off the shade around the worm bed. After 10 a.m. on sunny days, reduce the covering to a thinner level so sunlight can reach the material bed, then cover it again after 4 p.m. In winter, heat preservation measures need to be taken. You can use double-layer film with 1 layer of straw curtain sandwiched in between, which is 6degC warmer than covering with 1 layer of thin
条件筛选