At present, it is vegetables that change the season. When friends of vegetable farmers turn their soil and fertilize, they should not forget an important issue: the soil testing formula. Especially in some old sheds that have been planted for many years, the soil nutrients have been seriously deregulated. If you do not pay attention to balanced fertilization, the crops will not only have poor growth potential, but will have difficult to increase yield and quality. The plants will also have poor resistance to disease and disease, and they will be highly susceptible to diseases. Increased economic efficiency. Therefore, when fertilizing vegetables, farmers must remember to check the soil and figure out what is missing in their sheds so that they can know what to do and then formulate fertilizers to promote more robust growth of the vegetables. It is necessary to remind farmers to pay attention to the following points when applying fertilization by soil testing:
First, take soil samples must be reasonable.
Soil sample collection is the primary technical link for soil testing and formula fertilization. Whether the collection meets the technical requirements directly affects the accuracy of soil testing and formula fertilization, so the collected soil samples must be representative. When sampling, it can be sampled in the form of "S" or "diagonal", which can better avoid the errors caused by farming and fertilization. During actual operation, clean up the sampling tool and remove all the plant debris or other debris on the surface of the sampling point and avoid the roots. Then scrape off 2-3 cm thick topsoil at the sampling point, dig into an undamaged vertical section of less than 20 cm with a shovel, and then use a shovel to take a 10 cm wide, 2 cm thick vertical soil. Cut the soil piece with a knife into a width of 2 cm, a thickness of 2 cm, and a length of 0-20 cm from the top to the bottom, spread on a plastic sheet, squash the large pieces, remove the gravel, animal and plant residues, etc. Sundries. Collect 7-10 soil strips collected by the same method and mix well to make a mixture. Then spread the samples into a square shape, draw a diagonal line, and divide the soil sample into 4 parts by using the “quarters methodâ€. Keep two copies of the diagonal, and reduce it to 0.5 kg several times, and put it into the sample bag for laboratory use.
Second, the organic fertilizer must be applied when formulating.
After the soil samples are detected, when formula fertilizing, it is necessary to pay attention to the application of organic fertilizers such as chicken manure and rice husk manure. This is the basis for guaranteeing high quality and high yield of vegetables. Under normal circumstances, solanaceous vegetables should be based on each acre. Application of chicken manure 15-20 cubic meters, 35-40 cubic meters of rice husk manure; leaf vegetables per acre shed should apply 8-10 cubic meters of chicken manure, 15 cubic meters of rice manure. Note that organic manure such as chicken manure must be thoroughly cooked when applied, and it is best to combine deep pours after decomposed.
Third, do not "make up for evil" when you find that a certain element is lacking. After measuring the abundance of soil nutrients, it must be scientifically and rationally formulated. Do not find that a certain element is lacking, and then make a large amount of "nuisance", because excessive fertilization will not only cause waste, but also may cause fertilizer damage. When basic chemical fertilizer is applied, under normal circumstances, urea should not exceed 50 kg, phosphate fertilizer should not exceed 30 kg, and potassium fertilizer should not exceed 40 kg. If compound fertilizer is applied, it should not exceed 100 kg per mu.
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