There is a shortage of water resources in the northern part of China, and the annual rainfall is small, and it is mainly concentrated in the summer. The wheat growing season is windy and rainy, and the water consumption is large. 70% ~ 80% of the high-yield wheat field water needs to be supplemented by irrigation, and the wheat growing season is usually filled with water. 4 to 6 times, the total irrigation capacity is 3 100 ~ 3 800 m3 / hm2, and many areas are mainly maintained by over-exploitation of groundwater, which not only makes the water resources more tense, but also can not accommodate the loss of soil nutrients and pollution of groundwater in summer. The winter wheat water-saving and high-yield cultivation technology provides a new way of water-saving cultivation for the vast wheat areas in northern China, and it is also a major breakthrough in the development of “two high and one excellent†agriculture.
1 Select soil
Suitable soils for water-saving and high-yield cultivation are sandy soil, light soil and medium soil, and this technique can be adopted for medium-high fertility plots.
2 pouring the foot 墒
The water content of the 2 m soil was adjusted to more than 95% of the field water holding capacity by pouring the bottom water before sowing. The 2 m soil is black. It is necessary to change the traditional concept of “only more irrigation can make more grainâ€, establish a new concept based on the use of soil water, and store the soil water before sowing.
3 selection of good varieties
To achieve high yield under water-saving conditions, high-yield and drought-tolerant varieties with early maturity, multiple ears and stable, and fast filling must be used. Such as: 8871-3, Lumai 21, Jinan 17, and so on. After the wheat is sown in the ditch, the ridges are not repressed, and the surface bauxite is covered in the long winter, winter and early spring, which can play a good role in ensuring the mites.
4 All fertilizer base
Grasping the principle of “limited nitrogen, stable phosphorus, potassium and zinc, organic and inorganic combinationâ€, all fertilizers are used as base fertilizer to promote the development of roots and nutrient absorption in the early stage, and create conditions for the later use of lower soil moisture. At the same time, it can simplify field operations, reduce nitrogen fertilizer losses, and improve fertilizer utilization.
Generally speaking, under medium soil fertility conditions, the production target of 450 ~ 550 kg per 667 m2 (mu) is required to apply organic fertilizer 1.5 ~ 2.0 m3, diammonium phosphate 15 kg, urea 15 kg, potassium sulfate 10 kg, 1 kg of zinc sulfate.
5 sowing date and density
Properly broadcast later to reduce water consumption. Suitable sowing date is October 10 ~ 20, suitable for basic seedlings is 180,000 ~ 200,000 per 667 m2; fixed density at the sowing date, lower limit for early sowing, upper limit for late sowing, 1 d late in the sowing period , increase the amount of 0.5 kg.
6 Improve the quality of the land preparation and sowing
Improving land preparation and planting quality is a key link in water-saving and high-yield cultivation. In order to reduce the shrinking seedlings, reduce the rate of weak plants, and improve the uniformity of the ear, it is required to: 1 select the seeds to make the grain size uniform, and strictly eliminate the broken granules. 2 Deep-plowing and fine-graining, leveling the soil surface, and ploughing 15 to 20 cm. 3 Strictly control the sowing, so that the sowing depth is consistent (deep 3 ~ 5 cm), and the seeds are evenly distributed. The line spacing is 15 ~ 20 cm. The seeding volume should be adjusted strictly before the sowing.
7 only one water in spring
In the spring one-water system, the optimum irrigation period is jointing (medicine interval) to booting stage (four-part period). In this stage, according to the seedling situation and sensation, it should be broadcast as late as possible. In the non-dry hot wind, the irrigation yield was the highest in the jointing stage, and the dry-hot wind year was the highest in the booting stage. The irrigation amount per 667 m2 is 50 m3, and the water should be loosened in time before jointing.
8 Using soil storage and conservation
Well-being, first do simmering, then sowing, ridges within the suppression, there is a soil layer between the ridges, which is conducive to winter wheat protection.
9 Prevention of pests and diseases
Pay attention to the control of Laodelphax striatellus in the seedling stage, prevent powdery mildew and wheat stubble in the middle stage, and control the cotton bollworm in the later stage.
Total 1 | <First <Prev 1 Next> Last> |
share to:
Elevator Complete Control System
OTIS Elevator Complete
Control System, Thyssen Elevator Complete Control
System, KONE Elevator Complete Control System, GiantKONE Elevator Complete
Control System, ThyssenKrupp Elevator Complete Control System, Schindler
Elevator Complete Control System, XJ Schindler Elevator Complete Control System,
Xizi OTIS Elevator Complete Control System, Mitsubishi Elevator Complete
Control System, Shanghai Mitsubishi Elevator Complete Control System, Fujitec
Elevator Complete Control System, Hitachi Elevator Complete Control System,
Toshiba Elevator Complete Control System, Hyundai Elevator Complete Control
System, LG Elevator Complete Control System, Sigma Elevator Complete Control
System, Express Elevator Complete Control System, GUANGRI Elevator Complete
Control System, FUJI Elevator Complete Control System, BLT Elevator Complete
Control System, CANNY Elevator Complete Control System, SJEC Elevator Complete
Control System, KOYO Elevator Complete Control System, IFE Elevator Complete
Control System
Elevator Control System, Elevator Controller Cabinet, Elevator Control Cabinet, Elevator Controller, Elevator Complete Controller, Elevator Complete Control System, Elevator Control Panel
CEP Elevator Products ( China ) Co., Ltd. , https://www.zjelevatorcontrolsystem.com