Home Uncategorized What are the compound (mixed) materials that can be applied for cucumber cultivation?

What are the compound (mixed) materials that can be applied for cucumber cultivation?

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compound fertilizer is a mainstream chemical fertilizer developed in recent years. It has many advantages, such as small volume, high concentration, slow efficiency and so on, so it plays an important role in cucumber cultivation. Conceptually speaking, the material containing any two nutrients of nitrogen, phosphorus and potassium is called binary compound (mixed) Hefei material, and the material containing three nutrients is called ternary compound (mixed) Hefei material of nitrogen, phosphorus and potassium; In addition to the three nutrients of nitrogen, phosphorus and potassium, it also contains trace elements, which is called multicomponent compound (mixed) Hefei material; In addition to nutrients, those mixed with pesticides or auxin substances are called multifunctional compound (mixed) materials
there are differences between compound fertilizer and mixed fertilizer. The raw materials of compound fertilizer are mainly ores or chemical products. There is an obvious chemical reaction process in the process flow, and the product composition and nutrient concentration are generally fixed. The basic fertilizer of mixed fertilizer is mainly simple fertilizer or compound fertilizer, and the secondary processing technology of basic fertilizer is mainly based on simple physical methods. The formula can be adjusted within a certain range according to the production needs, and the composition and nutrient proportion of the product will change accordingly
in order to facilitate application, the analytical formula and nutrient content of fertilizer are indicated on the packaging bag of compound (mixed) materials produced by regular manufacturers. Fertilizer analysis formula mainly refers to the content percentage of n-p2o5-k2o in fertilizer. For example, for ternary compound (mixed) Hefei materials with 10% n (nitrogen), P2O5 (phosphorus pentoxide) and K2O (potassium oxide), the fertilizer analysis formula is 10-10-10; If the analytical formula is 25-10-0, it means that the fertilizer is a binary compound fertilizer containing 25% N, p2o510% and no potassium. If it is a multi-component compound (mixed) Hefei material, put the trace element content last and indicate the trace element symbol. For example, the analytical formula 20-20-15-2 (b) represents a multicomponent compound (mixture) of nitrogen, phosphorus, potassium and boron containing 2% boron
as long as the nutrient form, dosage ratio and cultivation conditions are consistent, the fertilizer efficiency is basically equivalent to the application of the same amount of simple fertilizer. Compound (mixed) fertilizer is usually applied as base fertilizer, combined with an appropriate amount of simple nitrogen fertilizer as topdressing. When used as base fertilizer, the application amount of compound (mixed) fertilizer should be determined based on the amount of phosphorus and potassium fertilizer suitable for local vegetable soil conditions. When the soil fertility is high or combined with organic fertilizer, the effect of hole application or strip application is good. However, it should be noted that when used as cucumber seed fertilizer, it must avoid direct contact with seeds, otherwise it will hurt seedlings and burn roots
the compound fertilizers selected for cucumber cultivation mainly include the following:
① ammonium phosphate fertilizer belongs to nitrogen phosphorus binary compound fertilizer, including monoammonium phosphate, diammonium phosphate and ammonium polyphosphate. Monoammonium phosphate is a colorless tetrahedral crystal. The pH of the aqueous solution is 4 ~ 4.4, which is the most stable. Ammonia is not easy to volatilize. Diammonium phosphate is a colorless monoclinic crystal. The pH of the aqueous solution is 7.8 ~ 8.0. The nature of diammonium phosphate is not very stable. Under wet and hot conditions, ammonia is easy to volatilize. Domestic ammonium phosphate is a mixture of monoammonium phosphate and diammonium phosphate. The total nutrient concentration is 60% ~ 68%, including 14% ~ 18% of n (nitrogen) and 46% ~ 50% of P2O5 (phosphorus pentoxide). It is usually made into granular fertilizer with moisture-proof agent for sale, and its property is relatively stable. Ammonium phosphate fertilizer is the fastest developing compound fertilizer variety at present. It is a kind of phosphorus based, high concentration nitrogen phosphorus binary compound fertilizer. All its effective nutrients are water-soluble, which is suitable for all kinds of soil and cucumber crops; And it is suitable to cooperate with various elemental nitrogen and potassium fertilizers and make various medium and high concentration mixed fertilizers after secondary processing
② potassium nitrate is an orthorhombic or rhombic colorless crystal, containing 12% ~ 15% n (nitrogen) and 45% ~ 46% K2O (potassium oxide), without side components, and its moisture absorption is less than that of general nitrate fertilizers. Except that a small amount of potassium nitrate is mined by natural minerals or boiled by soil nitrate, most of it is prepared by synthetic method or compound decomposition method. Potassium nitrate is a fertilizer containing more potassium and less nitrogen. Potassium nitrate is generally only used as topdressing, not as base fertilizer. Potassium nitrate itself is flammable and explosive, so care should be taken during storage, transportation and application to prevent high temperature and heavy blow of iron, and do not contact with combustibles
③ potassium dihydrogen phosphate, which is a phosphorus potassium binary compound fertilizer, contains 52% P2O5 (phosphorus pentoxide) and 35% K2O (potassium oxide). Pure potassium dihydrogen phosphate is a gray white powder with low hygroscopicity and good physical properties. It is easily soluble in water. The solubility is 23% at 20 ℃ and the pH of the aqueous solution is 3 ~ 4. As the price of potassium dihydrogen phosphate is very expensive, it is generally only used as foliar topdressing or seed soaking of cucumber. The concentration of foliar spraying should be controlled between 0.1% ~ 0.2%, which can be sprayed continuously for 2 ~ 3 times, and the effect is ideal. The concentration of cucumber seed soaking is about 0.2%, the soaking time shall not exceed 20 minutes, and then sowing shall be carried out after drying
the commonly used mixed fertilizers for cucumber cultivation mainly include ammonium thiophosphate, ammonium urea phosphate and ammonium nitrate phosphate, all of which are granular in shape. When using this kind of fertilizer, it should not be stored for a long time, and the storage period should not exceed 6 months; Moreover, it should be stored dry, and pay attention to monitoring the internal temperature of the fertilizer, so as not to make it too high and spontaneous combustion. Another kind of mixed fertilizer is called mixed fertilizer. At present, it has developed rapidly in Cucumber producing areas. It is mainly a chemical fertilizer that is mixed and applied by farmers or grass-roots agricultural technology stations according to the different absorption characteristics of cucumber crops. Because it has the advantages of simple mixing process, low equipment investment and processing cost, bulk transportation and saving packaging cost, The formula is flexible, so it has developed rapidly at the rural grass-roots level and achieved good results. It should be pointed out that the basic chemical fertilizer used for mixing fertilizer should have no adverse chemical reaction with each other. If you are not sure, please refer to the manual on chemical fertilizer mixing.

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