Subsea Gaskets ,Api17D Gasket,Sbx Ring Gasket,Subsea Gasket WENZHOU JINGWEI SEAL TECHNOLOGY CO., LTD , https://www.ringjoint-gasket.com
During the growth of seedlings, all kinds of nutrients needed for different growth stages of seedlings should be provided in time to meet the growth needs of seedlings.
First, the type of topdressing: topdressing generally uses quick-acting fertilizer or decomposed human excrement. The quick-acting fertilizers commonly used in nurseries include chemical fertilizers such as plant ash, ammonium sulfate, ammonium nitrate, ammonium chloride, urea, superphosphate, and potassium chloride.
Second, the number and frequency of topdressing: in the place where the soil fertility is good and the rainfall is not large, the amount of topdressing can be more. The number of times may be less; in areas with poor soil fertility or where there is a lot of rainfall, the number of top dressings should be high and the amount should be less. In general, the seedlings can be topdressed 2-6 times in the growing season. The first time is about 1 month after the seedlings are unearthed, and the seedlings are applied when several true leaves are grown. It will be applied every 10 days or so. The last top dressing time should be carried out one month before the seedlings stop growing. When applying top dressing, it should be from thin to thick, and the amount is less. At the right time.
Third, topdressing methods: can be divided into soil topdressing and root dressing. 1 soil topdressing. Dry and wet application. The dry application method is to apply the fertilizer ditch, and the depth of the ditch should be in the distribution layer of the root system to facilitate the absorption of fertilizer by the seedlings. The wet application method is to add water to the fertilizer to form a liquid, and uniformly apply it to the nursery ground. 2 external top dressing. That is, in the seedling growth period, the quick-acting fertilizer solution is sprayed on the seedling leaves, and the fertilizer solution is gradually infiltrated into the leaves for absorption by the plants. In order to make the solution evenly distributed on the leaf surface with very fine particles, in order to facilitate the absorption of the blade. Spray with a more powerful sprayer, preferably in the evening. If the rain fails within 2 days after spraying. It should be sprayed once after the rain.
How to topdress in the seedling growth period
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】