Phosphorus and potassium application of phosphorus can promote the development of rapeseed roots and enhance resistance; Potassium can improve rapeseed cold, disease resistance, lodging resistance. Raised soil in temperature-increasing rapeseed fields should be ploughed with cultivating soil to remove surface compaction, improve permeability, and increase surface soil temperature. The principle is: cold and shallow farming, cold soil, deep plowing; soil dry before the rain, wet after the rain; cultivator before fertilization, rooting after fertilization, beneficial warming. Soil cover fertilizer at the daily average temperature of 0 °C, in the rapeseed between the rows of soil and cover soil miscellaneous fertilizer, large seedlings Bacon, strong seedlings Pei Xin, seedlings covered with roots, with the decomposition of compost soil miscellaneous manure, can be mixed with fine soil Shred grass to cover. Antifreeze rapeseed fields with irrigation water can be supplied with water once before the onset of the cold current, and can be stably supplied to the water during the overwintering period of rape to effectively prevent freezing. After irrigation, it should be carried out on a sunny day at noon so that the top soil layer under the frozen protrusions will sink. Ensure that the roots of rape are in close contact with the soil. Before re-apply wax fertilizer over the winter, in the rapeseed topdressing Shihuo ash or Tuza, can increase the soil temperature 2 °C ~ 3 °C, play the effect of winter spring, every 667m2 Shi 1000 ~ 1500 kg of pig cow dung or 2500 ~ 3000 kg soil organic fertilizer. Foliar fertilizer rape spraying foliar phosphorus and potash fertilizer before winter can improve the cold resistance; spraying potassium dihydrogen phosphate, vigor and Huimanfeng solution during wintering, spray 0.2% borax on boron-deficient rapeseed Solution. Covering grass protection Before the onset of frost damage, a layer of crop stalks can be placed on the leaf surface of rapeseed to reduce the direct impact of cold wind on the roots of rapeseed; a layer of grass ash can also be applied on the rape leaf. Disease prevention and pest control for the prevention of rape aphids, cabbage caterpillars, beetles, generally with 10% imidacloprid 10 to 15 grams of water spray; also available 40% omethoate 100 ml and 2.5% enemy killed 20 ml, 150 kg of water spray For rape fields that are severely catastrophic, carbendazim or thiophanate can be used for control. Control of early infestation of early rapeseed rape, can be sprayed paclobutrazol solution, with 667m2 with 15% paclobutrazol powder 35 to 50 grams, 55 to 75 kilograms of water, even spray, control early onset. After the management of cold flow after the freeze, the seedlings were checked and the roots of the frozen seedlings were found to be rooted and cultivated in time. The rain and snow weather eliminated the water accumulation in the field early to avoid waterlogging and hindering root growth. When thawing, timely spraying of ash on the rapeseed or spraying of fresh water on the leaves can effectively prevent freezing damage and dehydration.
Color Doppler Ultrasound Scanner
"Color Doppler Ultrasound Scanner" is a high-definition black-and-white B-ultrasound plus color Doppler. Its main advantages are: it can quickly and intuitively display the two-dimensional plane distribution of blood flow; it can display the running direction of blood flow; it is beneficial to distinguish between arteries and veins; it is beneficial to identify vascular disease and non-vascular disease; it is beneficial to understand the nature of blood flow ; It is convenient to understand the phase and speed of blood flow; it can reliably detect shunt and regurgitation; it can quantitatively analyze the origin, width, length and area of blood flow. These ultrasound manifestations and parameters play a very important auxiliary role in the diagnosis of clinical diseases.
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