Spring wheat's reproductive characteristics can be summarized as "three shorts, three little, early morning." Three short crops have a short growth period. Winter wheat is about 260 days from sowing to harvest. Spring wheat is only about 95 days. If calculated from the seedling stage, the spring wheat growth period accounts for only one third of winter wheat; the vegetative growth period is short and the winter wheat is in autumn. Temperature from high to low, sunshine from long to short, through the vernalization phase is slow, remove the winter period, vegetative growth period of up to 70 days. The spring sowing temperature of spring wheat is from low to high, and the sunshine is from short to long. It quickly enters the light stage through the vernalization stage, and it takes less than 20 days from emergence to single-edge period. Therefore, the developmental characteristics of a short delivery period are formed. Three or less are the main stem leaves, the main stem leaves of 10 to 13 pieces of winter wheat, spring wheat is only 7 pieces to 9 pieces; there is less tillering, due to short spring tillering period, fewer tillers, low tillering rate of tillers, mainly depend on the main Stems are spiked; secondary roots are few, and shallow roots are weak, with prone to premature failure due to defertilization and water shortage. Early in the morning, the ear differentiation was early, and generally the three-leaf growth cones began to differentiate into the elongation phase, the four leaves entered the two-legged phase, and the five-leaf floret original body differentiated. According to these biological characteristics of spring wheat, it provides an important scientific basis for the establishment of the former heavy cultivation system in planting management. ?Spring wheat high-yielding cultivation techniques points? Focus on: "two feet early in the morning, two shallow a secret, the use of fertilizer and water, governance and protection of grain weight." Two feet early in the morning: the end of the foot, feet at the end of the feet, early sowing. At the end of the road, it means that spring wheat fields should be ploughed in winter to fill in for the early planting. At the end of the season, it refers to applying sufficient nitrogen and phosphorus fertilizer before sowing on the basis of sufficient organic fertilizer before autumn ploughing. In spring wheat fields and winter wheat fields, nitrogen deficiency, severe phosphorus deficiency, and diazonium light phosphorus in fertilization habits lead to serious imbalance of nitrogen and phosphorus in wheat fields, and has become a major limiting factor in spring wheat production. Spring wheat is more sensitive to phosphorus than winter wheat, and the growth and development of spring wheat is faster, the panicle differentiation begins in the third leaf stage, and it is also in the weaning stage. The reproductive growth and vegetative growth go hand in hand and it needs to absorb large amounts of fertilizer. At this time, defertilization, one can not tolerate time to recover, and second, even if the recovery can not make up for loss caused by deferment. Therefore, the base fertilizer must be given enough, to increase phosphate fertilizer, adjust the ratio of nitrogen and phosphorus, the general hectare output is about 4500 kg (300 kg/mu), should apply diammonium 300 kg (20 kg/mu) or so, mixed urea 75 kg ~ 105 kg (5-7 kg/mu). Early sowing is the top Ling sowing; the average temperature of the day reached 2 °C ~ 4 °C, daytime freezing 6 cm ~ 7 cm, sowing at night when still frozen. The Tianjin region should generally master the sowing on February 20 and end on March 5. Two shallow ones: shallow fertilization, shallow sowing, and reasonable close planting. The appropriate depth of fertilization is 7 cm to 10 cm. Tests have shown that the shallow application of 7 cm to 10 cm is 15 cm to 20 cm deeper, and the yield per hectare of 666.7 m2 (1 mu) is 25 kg to 35 kg. The fertilization method is as follows: First, a double-casing planter is used to sow seeding in front of the seed fertilizer; secondly, the seedling is replanted, sowing the fertilizer first and then sowing. The sowing depth is suitable for 3 cm, the temperature of the sowing is high, the emergence is fast, the root system is developed, and the strong seedlings are easy to form. Spring wheat is mainly composed of main stem and ear, so it should be planted in an appropriate density. The yield per hectare is 4500 kg (300 kg/mu), and 5.25 million basic seedlings are appropriate. The sowing amount should be 225 kg to 262.5 kg (15 kg). 17 kg/mu). In order to prevent overcrowding of seedlings in ridges, they must be grained and shrunk, changed to seeding and sowing, and used 15 cm to 20 cm line spacing and sowing, or wide and narrow line drilling. • Skillful use of fertilizers and water: Endosperm nutrients are used up at the 3rd leaf stage of spring wheat, and it is also the stage of panicle differentiation and tillering. This requires more nutrients and is a critical period for fighting multiple spikes and spikes. Therefore, the first time the fertilizer and water is early, can be poured in the three leaves at the same time, combined with water topdressing ammonium bicarbonate 35 kg to 40 kg, or 15 kg of urea. After the first water, the seedlings should be properly plucked and the water should be poured into the water when the first festival is set to a fixed length.蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜 蚜. In the middle of May, the panicle stage should be controlled.
Poultry farming is the process of raising domesticated birds such as chickens, ducks, turkeys and geese for the purpose of farming meat or eggs for food. Poultry are farmed in great numbers with chickens being the most numerous. More than 50 billion chickens are raised annually as a source of food, for both their meat and their eggs.[1] Chickens raised for eggs are usually called layers while chickens raised for meat are often called broilers.[1] In the US, the national organization overseeing poultry production is the Food and Drug Administration (FDA). In the UK, the national organisation is the Department for Environment, Food and Rural Affairs (Defra).
Poultry Husbandry Tools,Water Nipple,Leg Ring,Food Feeder
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