1. Water-saving and high-yield planting mode of wheat multiple cropping corn
Multiple cropping of wheat and corn is a kind of production, and many planting modes have been adopted in the world. This model can not only give full play to the role of agricultural machinery and adopt scientific management methods, but also achieve the effect of water saving and high yield.
Wheat should be sown with equal row spacing according to the requirements of high yield of varieties, and corn should be sown with equal row spacing (60~ 70cm) or wide and narrow rows (80cm+40cm) manually or mechanically in time after wheat harvest. Wheat 65438+1early October is suitable for precision sowing or semi-precision sowing, with 900,000 ~/kloc-0.8 million basic seedlings per hectare. Corn is a compact variety, and wheat should be sown in time after harvest. Generally, it must be broadcast before June 10. The planting density of corn is 67500 ~ 82500 plants per hectare. In this mode, there is no * * period between wheat and corn, and there will be no competition between glory, fertilizer and water. Wheat should choose high-yield varieties with medium maturity, short stature, strong fruiting, disease resistance, cold resistance and high quality, except corn, which should choose medium-early maturity, high yield and high quality varieties; Maize should choose early and middle maturity varieties with compact, disease-resistant, lodging-resistant, high quality and high yield.
2. Water-saving and efficient planting mode of onion interplanting cotton
The interplanting of onion and cotton is beneficial in time and space. Onions are usually planted in early October of 165438+ 10. At this time, the first frost has passed, the cotton has stopped growing, and there is enough time for fertilization and soil preparation. Onion plants are short, and transplanting cotton in mid-May next year has little effect on cotton growth. Choosing hybrid cotton as cotton variety is more beneficial to high yield of cotton. Onion and cotton are covered with plastic film and wheat straw respectively, which can conserve moisture and save water. This model has good economic benefits, the net income per mu can reach about 4 000 yuan, and the field management is convenient. After onion harvest, cotton is planted in wide and narrow rows, and the lateral benefits are remarkable. In this mode, onion (1 1) is planted at the beginning of October, and interplanting rows are reserved, and 2 rows are reserved for every 6 rows (6/2 type). Onion spacing 18cm, cotton onion spacing 10cm, bandwidth 160cm, cotton spacing 50cm (narrow row 50cm, wide row 65433). Transplant cotton in mid-May. Harvest onions in early June. 65438+ first frost, pulling cotton and firewood in late October. 165438+ October. Early planting of onion. So back and forth.
3. "1234" water-saving mode of dry-farming wheat-corn double cropping system
"1234" wheat-corn model is a technical assembly model under the double cropping system of wheat and corn in the dry farming area of northern China. Its main characteristics are less operation times, low cost of machines and tools, and obvious time-grabbing effect. The main content of this model is to adhere to two basic points, grasp three links and grasp four links around a main line. Among them, around the main line is closely around the main line of wheat and corn integration. Adhere to two basic points, that is, adhere to straw mulching and conservation tillage with less (no) tillage, with the goal of storing water in the sky and improving the utilization rate of precipitation. Do a good job of three connections, that is, in the process of integrated production of wheat and corn, pay attention to the connection between wheat varieties and corn varieties, the connection between planting methods and variety types, and the connection between farming measures and farming tools. Four links need to be grasped: first, choose drought-resistant and water-saving varieties to realize biological water saving; Second, adopt appropriate sowing methods to ensure that all seedlings are sown; Third, implement all-round optimized fertilization to achieve high water and fertilizer efficiency.
Use; Fourth, strengthen on-site management to achieve the group structure goal.
Part of the content is taken from "Water-saving Planting Mode in Northern China".