How should Welsh onions be fertilized during cultivation to achieve high yields?
How should Welsh onions be fertilized during cultivation to achieve high yields? How much fertilizer is needed per mu of Welsh onions? We also ask netizens with experience growing Welsh onions to help explain. Welsh onions have the effects of preventing cancer, improving appetite, relaxing blood vessels, lowering cholesterol, and tonifying yang and nourishing yin, and are therefore welcomed by a wide range of consumers. For this reason, Zhongdiwang has compiled the fertilization methods for growing Welsh onions...
How should Welsh onions be fertilized during cultivation to achieve high yields? How much fertilizer is needed per mu of Welsh onions? We also ask netizens with experience growing Welsh onions to help explain.Welsh onions have the effects of preventing cancer, improving appetite, relaxing blood vessels, lowering cholesterol, and tonifying yang and nourishing yin, and are therefore welcomed by a wide range of consumers. For this reason, Zhongdiwang has compiled the fertilization methods for growing Welsh onions, listed in detail below for netizens' reference.
1. Fertilizer requirements of Welsh onions:
Generally, under high-yield conditions, Welsh onions can reach 5000-6000 kg/mu. Therefore, Welsh onions have a high demand for nutrients. Under normal conditions, every 1000 kg of Welsh onions produced requires 2.7-3.3 kg of pure nitrogen, 0.5-0.6 kg of phosphorus pentoxide, and 3.3-4.0 kg of potassium oxide. The absorption ratio of nitrogen, phosphorus, and potassium is 1:0.4:1.3, and they are very sensitive to potassium and nitrogen nutrition.
2. Fertilization principles for Welsh onions:
If potassium fertilizer is not applied or is applied sparingly when growing Welsh onions, the content of available potassium in the soil will drop sharply, and the ratio of nitrogen, phosphorus, and potassium will be seriously unbalanced, leading to increased pests and diseases in Welsh onions, reduced yield, poorer quality, and lower economic benefits from growing Welsh onions.
Applying potassium fertilizer to Welsh onions can promote their growth and improve their resistance to pests and diseases. When Welsh onions lack potassium, their growth and development are slow, the plants are short, the white stalks are short and small, and the yield is low.
Balanced fertilization of Welsh onions has a highly significant yield-increasing effect, and can increase the content of vitamin C and soluble sugars in Welsh onions, reduce the content of harmful substances such as nitrate, and improve both the internal and external quality of Welsh onions.
After years of trials, after applying potassium fertilizer, the yield of Welsh onions increased by 22.3%-28.2%, the vitamin C content increased by 7.20%-16.0%, the soluble sugar content increased relatively by 15.5% and 12.7%, and the nitrate content decreased by 22.6% and 26.5%; the income per mu increased by 1690-2000 yuan, and the output-to-input ratio of applying potassium fertilizer was as high as 72.42 and 40.67:1. The balanced fertilization technology for Welsh onions centered on supplemental potassium fertilizer covered an area of more than 35000 mu, with an average yield increase of about 20%.
3. Fertilization recommendations for Welsh onions:
The balanced fertilization technology for Welsh onions is simple and easy to implement. Fertilization amount: on the basis of applying organic fertilizer, for medium-fertility plots, the suitable fertilization amount is 20-25 kg of pure nitrogen, 6-8 kg of phosphorus pentoxide, and 20-30 kg of potassium oxide per mu, equivalent to 40-55 kg of urea, 50-65 kg of ordinary superphosphate (available phosphorus content 12%), and 35-50 kg of potassium chloride (available potassium content 60%).
If the soil fertility of the Welsh onion planting site is low and organic fertilizer is lacking, a higher fertilization amount may be considered; conversely, when soil fertility is high and the soil foundation is good, the fertilization amount can be appropriately reduced.
4. Fertilization methods for Welsh onions:
1. Before sowing Welsh onions, mix 20% of the nitrogen and potassium fertilizer and all of the phosphorus fertilizer evenly and broadcast them as a base fertilizer over the entire layer, then plow them deep into the soil.
2. The remaining 80% of the nitrogen and potassium fertilizer should mainly be used as topdressing, applied in two split applications in mid-September and mid-to-late October.
What should be noted when hilling soil around Welsh onions?
Zhangqiu Welsh onion cultivation video