What kind of fertilizer is used to grow potatoes now for high yield? What should I pay attention to when buying fertilizer?

Potatoes are also known as yam, yam egg, sweet potato, potato What kind of fertilizer is used to grow potatoes now for high yield? What should I pay attention to when buying fertilizer?

What kind of fertilizer is used to grow potatoes now for high yield?

Potato is a crop sensitive to fertilizer, which is resistant to fertilizer, likes potassium and sulfur. In the process of growth, the demand for nitrogen, phosphorus and potassium is the most, followed by nitrogen and less phosphorus. According to the different soil texture and the national comprehensive fertilizer use efficiency, it is suitable to use the compound fertilizer with high nitrogen, low phosphorus and high potassium, and the potassium sulfate type is the best.

Application of base fertilizer: organic fertilizer + balanced potassium sulfate compound fertilizer. Topdressing applies high-nitrogen and high-potassium potassium sulfate compound fertilizer, the amount of application depends on your target yield.

Specific methods:

On the basis of proper use of farm manure, Zinong brand potassium sulfate long-term compound fertilizer or high quality flushing fertilizer can be selected as base fertilizer. When applying fertilizer with 50-70 kg per mu, we must plant fertilizer to isolate and strictly prevent burning seeds and seedlings.

Common problems in potato cultivation:

1. Too much nitrogen and phosphorus, but insufficient potash fertilizer. We can see from the law of fertilizer demand of potatoes that potassium is twice as much as nitrogen and five times as much as phosphorus, and certain fertilizers such as calcium, magnesium and sulfur should be used. for example, the proportion of nitrogen, phosphorus and potassium in fertilization is unreasonable and can not meet the requirements of fertilizer demand. you can't get high and stable yield. There are some elderly farmers who only use nitrogen and phosphorus fertilizers in fertilizing potatoes, and do not use potash and medium element fertilizers at all. as a result, the annual output is low and unstable, so they mistakenly think that the fertilizer is not good. I don't know that the reason for the low yield is the lack of potassium in the soil, not applying potash fertilizer and medium elements.

2. Some farmers are still applying fertilizers with high chlorine content. Potato is a chlorine-forbidden crop. If chlorine-containing fertilizer is applied, it will affect the formation and accumulation of starch and the quality of tubers. It is best to choose potassium sulfate fertilizer for growing potatoes. In addition, continuous continuous cropping results in a single nutrient, resulting in the decline of soil fertility and serious disease. In order to avoid the decline of soil fertility, the imbalance of nutrients and the aggravation of soil infectious diseases caused by continuous cropping all the year round, the root growth is controlled and the nutrient absorption capacity is greatly reduced.

What should I pay attention to when buying fertilizer?

1. Modify the name of fertilizer product without authorization. The actual name of the fertilizer product is "ammonium sulfate", while the leaflet is printed with exaggerated "corn nutrients".

2. Hype drives up the price of fertilizer. The actual price of ammonium sulfate in the market is no more than 70 yuan per bag, and the fertilizer adopts the method of "buy ten bags and get five free". The unit price of each bag is 130 yuan, including the donated fertilizer, the actual price of each bag is 86.6 yuan.

3. Modify the implementation standard of fertilizer without authorization. The actual implementation standard of ammonium sulfate is GB535-1995, while the implementation standard of leaflets and packaging labels of this product is the implementation standard of compound fertilizer GB15063-2009.

4. Exaggerate the nutrients and efficacy of fertilizer. The concepts of nitrogen (N), phosphorus (P2O5) and potassium (K2O), which are necessary for crop growth, are deliberately ambiguous, misleading buyers to mistake medium element sulfur (S) as large amount of element phosphorus (P2O5) and trace element zinc (Zn) as large amount of potassium (K2O). In fact, the fertilizer product does not contain phosphorus or potassium. The fertilizer leaflet introduces that the fertilizer has the pesticide function of "insecticide repellent and antibacterial", which is pure fabrication.

5. Act secretively and evade supervision. Take the way of picking up and delivering farmers door-to-door, and most of the training places are small hotels, farm music, and other places, and constantly change secret training places, train teachers to pretend to be agricultural technicians, and make up the use of technology to "deceive" farmers. The location of the inventory is secretive, and it is often ordered during training and secretly distributed directly to farmers to evade the supervision of law enforcement departments.

6. The technical explanation that some people reflect that the effect of this fertilizer is good. The fertilizer is actually "agricultural ammonium sulfate fertilizer", commonly known as "fertile field powder". It contains a large amount of element nitrogen (N) of 20% color 21%, and some also add medium element sulfur (S) and trace element zinc (Zn). In recent years, medium element sulfur has been proved to promote the growth of corn, and the lack of trace element zinc in corn will also cause pathological changes, which is similar to the one-time application of nitrogen fertilizer and phosphate fertilizer. It is related to the excessive acidity of the soil. However, sulfur and zinc are not one of the three large amounts of elements necessary for crop growth, and ammonium sulfate does not contain phosphorus (P2O5) and potassium (K2O). According to the nutrient requirements of corn, the order is nitrogen (N) > potassium (K2O) > phosphorus (P2O5). Among the three large element nutrients needed by crops, nitrogen is consumed and volatilized most rapidly in the soil and is generally consumed and volatilized in the same year. On the other hand, the volatilization of phosphorus and potassium is the slowest, and there are still residues in the second year, while compound fertilizer, compound fertilizer and mixed fertilizer will increase the residue of phosphorus and potassium in soil for many years because of the high production technology and technology. Therefore, after using high-content phosphate fertilizer (such as diammonium phosphate) and potassium fertilizer (such as potassium chloride) or compounding, compounding and mixing fertilizer for many years, ammonium sulfate was used that year. If there are phosphorus and potassium nutrients in the soil, it will not cause a significant reduction in corn production, which is often the reason why there is no obvious change in yield. It is not a mysterious technology. And in recent years, there are many high-temperature and dry climate in summer in our county, and farmers tend to associate production reduction with climate, ignoring the scientific use of fertilizers. If only ammonium sulfate fertilizer is used continuously for many years, once the phosphorus and potassium nutrients in the soil are completely absorbed or volatilized by corn, the symptoms of phosphorus deficiency and potassium deficiency in corn will occur: phosphorus deficiency will lead to slow plant growth and poor pollination. Corn ear grain is not arranged neatly, lack of grain phenomenon Potassium deficiency will cause maize plant thinning and smaller, plant lodging, small ear, ear tip, deep depression at the back of the grain, not full grain and other phenomena, affecting the growth and yield of corn.

Tip: the broad masses of farmers must not be partial to the use of seeds, fertilizers, pesticides, and other important agricultural products of "pseudoscience", raise their awareness of preventing "deception", and do not blindly seek bargains and ignore real science and technology. In addition, the function of fertilizer is to provide nutrients to crops, and it will never have the effect of pesticides. Do not believe the "nonsense" that "fertilizers can be used to kill weeds, bacteria and insects."