1, Water-soluble fertiliser can do bottom fertilizer?

A: Water-soluble fertiliser can not be used as a bottom fertilizer, why is not suitable for bottom fertilizer, let's take a look at the water-soluble fertilizer formula composition characteristics:

(1) A large number of elements, soluble nitrogen, phosphorus and potassium three elements, such as nitrogen nitrogen, ammonium nitrogen, amide nitrogen three, potassium nitrate, potassium sulfate or MKP. Compared with the three elements in ordinary fertiliser, it has the characteristics of fast absorption and high utilisation rate, and it has more advantages in the peak fertiliser demand of the crop in the later stage of fruiting.

(2) Trace elements, water-soluble fertilizers mostly use chelated trace elements (Zn, Fe, Cu, Mn, B, Mg, etc.), these trace elements in the mid- and late-stage crops can be supplemented for the crop nutrients. In addition, there are amino acids and humic acid in water-soluble fertiliser. These elements are characterised by the plant can be directly absorbed and utilised, the flush can be fully absorbed in about 5 days, and at this time the fruit is in the expansion of the key period of increased production.

These water-soluble fertiliser nutrients holding period of 20 days or so, which shows why we need to do fertiliser rather than bottom fertiliser, as the so-called rational mix of the best use of materials.

2, The application of trace elements water-soluble fertiliser precautions

(1) Pay attention to the application amount and concentration: the crop on the need for trace elements is very small, and from the appropriate amount to excessive range is very narrow, so to prevent the application of micronutrient fertiliser is too large. Soil application must be applied evenly, otherwise it will cause plant poisoning and pollute the soil and environment.

(2)Pay attention to improve the soil environmental conditions:The lack of micronutrients is often not because of the low content of micronutrients in the soil, but its low effectiveness.By regulating the soil conditions, such as soil acidity and alkalinity, soil texture, organic matter content, soil water content, etc., the soil micronutrient nutritional conditions can be effectively improved.

(3)Pay attention to the application with large amount of elemental fertilizer. Trace elements and nitrogen, phosphorus, potassium and other nutrients are equally important, irreplaceable, only in the premise of meeting the plant's need for large amounts of elements, the application of trace element fertilisers can play a fertiliser effect, showing a significant increase in yield.

3, Urea can be watered immediately after application?

A: Fertilizer can not be watered immediately after application, in the rain before the application of urea can not be used, because urea contains amide nitrogen can not be directly absorbed by the crop, it must be converted into ammonium nitrogen through the decomposition of soil microorganisms to be absorbed by the crop, the conversion time is generally in the 10-20 days, if the use of urea in the urea immediately after the watering of urea will be drenched to the crop rhizosphere, resulting in a waste of fertilizers and pollution of the environment. The water-soluble fertiliser can improve the seedling's quality.

4, Water-soluble fertiliser can raise seedlings?

A: Yes. Plants in the growth process will appear due to photosynthetic deficiency or lack of vegetation caused by weak seedlings, seedlings yellow. Although the seedling period is not more than the growth period, but if the lack of a certain element, will also cause deficiency disease, such as seedling yellow, stem cracking, flowers and leaves, short growth; at this time, you need to supplement the silo high nitrogen water-soluble fertiliser and silo rooting water-soluble fertilizer to regulate crop nutrient growth, enhance crop resistance to adversity to promote the growth of healthy crops. When there is due to high temperature or low temperature caused by weak seedlings, poor seedling retardation, because high temperature water evaporation is too fast, if not timely watering, it will cause the leaves to wilt, and in severe cases will cause the plant to wither; low temperature, low ground temperature, so that the soil freezing, poor air permeability, crop root respiration is impeded, the plant grows slowly, the weak seedling situation. These situations can be solved through the use of fertilisers, such as high temperature can be sprayed in the warehouse amino acid water-soluble fertiliser, not only can give the crop cooling, but also improve the ability of crop resistance to high temperatures; low temperatures, can be applied in the warehouse microbial fungus, to improve the ground temperature, so that the soil permeability is good, and promote the development of the root system, so that it is slow to seedling good, seedling seedling strong.