1. Plantation techniques have the following elements: choice of varieties is good, disease-resistant and reversible, storage is resistant, tastes are good and high-yield quality varieties are high。
2, 2 and select sapling beds for plots with a high level of aridity, good soil quality and high earth power。
(charts of relevant information)
In order to avoid the disease during the seeding period, 3, 3, 3, 3, and to disinfect the soil from the seedbed, it may be used to use more than 50% fungus, or 50% for plumbing, or 40% for blending, 8-10 g per square metre, to mix the soil and to remove a third of it from the seedbed。
After planting, 4, 2/3 is covered with seeds, which can also be disinfected with 40% of the ff 30 ml and 100 times the water spray bed。
5 after spraying, membrane cover is used, 4 to 5 days after withdrawal and 2 weeks after planting。
6, 5, seeding and seedling management were planted in mid-september and 50-60 days of age during planting。
7. The method of sowing is based on isaac and can also be broadcast in a ditch。
The amount of seed used is 5-6 g/m2 and 100-15 g/ha for field use。
Nine, six, before sowing the bottom water and seven to eight days after seeding。
10, after seeding, and at time, at a distance of 3 cm。
11. Pay attention to pest control and weed eradication。
12. Extended data: the embryos of onions will shrink soon after they enter the earth, thus leaving them without their roots, with their roots in string, their roots in the base of a condensed disk, their roots are weak, their roots are not hairy and their roots are mainly concentrated in the surface layer of 20 cm, which makes them less drought-resistant。
13. During their nutritional growth, the onion's stem shrinks into a flat cone-shaped tubing, with a stagger on the lower end of the tubing, and a cylindrical stubble and sprouts on the upper part of the tubing, with a stubble。
14. The drying of the clinker tissues of mature saps prevents water from entering the sap。
15. Onions are less able to absorb fat water。
16, root growth temperatures are lower than above the ground, with root systems starting to grow at 5°c, 10-15°c being the most moderate, and 24-25°c slowly。
17. The coils control the premature growth of the root or the early growth of the stem, during which the plant is exposed to the conditions of low temperature and long sun, the growth cones begin to split, the bouquets are drawn, the bouquets are in shape, the mid-empty, the centre expands, there is pollen, and the top is formed in bouquets, and the flowers grow。
18. Onions of the ball are formed in the flowers by the degradation of the flower season。
19 references: encyclopedia-onion。
