Increasing yield of vegetables: rational fertilization is the key

Vegetables need to increase production, from planting to growth, they can not do without fertilizer, but what fertilizer? How to fertilize correctly? There is a lot of learning in it. If you don't get it, it will be half the effort, resulting in increased costs and reduced vegetables. In order to solve this problem, this newspaper combines two incorrect fertilization cases, asks experts to conduct an in-depth analysis, and teaches everyone how to apply urea and organic fertilizer reasonably to give full play to their fertilizer effects.

 

At present, it is the peak season of vegetable production in the southern region. In Guangdong, Yunnan and other places, most of the farmland is seen. Some white radishes are mature and can be marketed. Some mustard seedlings are being planted, and the potato seedlings are being planted. period. Fertilize before planting. As for the application of fertilizer and how to apply fertilizer,

 

Q: Please analyze the reasonable fertilization method?

 

Experts: First of all, it is unreasonable to apply a large amount of granular urea to the surface of the vegetable in the vegetable seedlings that have just planted seedlings. This is from the characteristics of urea, which is an amide nitrogen fertilizer with a nitrogen content of up to 46% . Although it is a water-soluble quick-acting nitrogen fertilizer, the temperature in the south is low in the winter, and there is not much rain. The granular urea is difficult to dissolve rapidly on the surface. However, if it is exposed to the atmosphere for a long time, as the granular urea is slowly dissolved by the surface moisture, it will decompose into ammonium carbonate under the action of surface soil urease. It is well known that the character of ammonium carbonate is more unstable than "hydrogen fertilizer" - ammonium bicarbonate, and is more likely to decompose to produce ammonia and volatilize. Especially on the relatively dry surface, wind and rain can directly cause the loss of ammonia volatilization. The amount of this volatile amount is positively correlated with the amount of fertilizer applied, surface temperature, atmospheric wind speed and soil pH , and inversely related to surface moisture. A large number of simulation tests have shown that the fertilization loss rate of ammonia caused by this fertilization method is as much as 30% to 50% . In addition, in the facility greenhouse, when the amount of fertilization is large, the ammonia volatilization is serious, and at the same time, when the ventilation is poor, the ammonia seed can be directly burned to the seedling leaves. Sometimes, the surface hydrothermal conditions cause the urea to decompose rapidly, forming a high concentration of ammonium in the surface soil, which leads to the problem of rooting of the seedlings. Those ammonia that are volatilized are difficult for the farmers to see with the naked eye, but when the seedlings grow up and need a lot of fertilizer, the fertility is small, and then they have to re-fertilize. This is an important reason for the low utilization rate of high concentration urea.

 

Expert: Pile up straw on the vegetable meal to make organic fertilizer base fertilizer. The straw has not been completely decomposed and directly turned into the soil. Since the carbon / nitrogen ratio of the straw is too wide, the decomposition rate will be slower. If the urea scattered on the surface is mixed with the straw and then pressed into the soil , the straw will accelerate decomposition and become a qualified organic fertilizer due to the proper carbon / nitrogen ratio of the mixed material . As explained above, it is scientific and reasonable to apply the urea meter to the method of mixing urea into straw and applying it as a base fertilizer. It is beneficial to the decomposing of straw and the fertilizer efficiency of urea. Because urea is suitable for deep fertilization, application to the soil is beneficial to the conversion of urea and the loss of volatilization after conversion of urea to ammonium carbonate.

 

DOUBLE SIDE PRINT NYLON COATED MEASURING TAPE

Steel Tape Material Tape Measure,Stainless House Shaped Keychain,Unit Gift Steel Measuring Tape

HENAN BONTHE MEASURING TOOLS. CO., LTD , https://www.tapemeasurebte.com