First, grade seedlings. Before planting, it is necessary to do a good job in selecting seedlings and grading, eliminating diseased seedlings, dwarfing seedlings, leggy seedlings, branching seedlings, and seedlings whose leaf sheaths are soft and whose leaves have grown too yellow; select seedlings with well-developed roots and robust growth. And according to the height of seedlings and the thickness of the base of the stem were planted. Second, suitable colonization. Onion planting time is divided into autumn and spring planting. The autumn planting is planted about 40 days before the arrival of cold, so that the root system has recovered before winter. The spring planting should be as early as possible, and the soil can be planted after thawing to strive for a longer growth period. Third, suitable for planting. The onion is suitable for shallow planting. When the planting is too deep, the overgrowth of the leaves will make the pseudostem thicken and affect the expansion of the bulb. However, when the planting is too shallow, it is easy to fall down after watering, affecting the seedlings, and the plants are dwarf and the bulbs are formed earlier. At the same time, some bulbs are exposed, and the sun discolors or cracks and reduces the quality. In general, the depth of planting is about 2 cm. Planting depth is related to planting time and soil texture. The spring planting should be shallow, and the autumn planting can be slightly deeper. If the soil is too heavy, the planting will be too deep and the expansion of the bulb will be affected due to the resistance of the soil, so that the yield will be reduced. Therefore, the plant should be planted in shallow depth and the sandy soil may be slightly deeper. Fourth, appropriate dense planting. The onion plants stand upright, and the appropriate dense planting has a significant effect on yield increase. The average plant spacing is 15 to 18 cm, the plant spacing is 10 to 13 cm, and 3 to 40 thousand plants per acre (667 square meters) can be planted. The planting density of red husks should be smaller than that of yellow husks. Spice Novelties Co.,Limited , https://www.wholesale-adult-toys.cn
Onions should not be used in conjunction with other onions and garlic vegetables. Before the fall, they planted eggplant, melons, beans and early autumn vegetables; Onion root system is shallow and small, and its absorption capacity is weak. It requires soil intensive cultivation.