4 months after the application of rice husk dung, the second cucumber still burned
According to Master Liu of Yuncheng Vegetable Farmers, “The greenhouse cucumber I planted this year is now the second one, because the shed has not been used in a rush, no manure has been applied in the shed, and only one bag of fertilizer is used. However, the cucumber seedlings in the shed can appear. The air damage phenomenon really does not understand."
After entering the shed, the author discovered that the rice husk manure applied to the soil by Master Liu was still not fully fermented, and the condition was improved after turning to the ground, accelerating fermentation and decomposing, resulting in more harmful gases, coupled with poor ventilation, will appear Burning seedling phenomenon. Many vegetable farmers can not help but ask: rice husk manure has been used for more than four months, the first crop of vegetables did not appear obvious symptoms of air damage, why now it has produced gas damage it?
It turned out that the rice hull epidermis has a layer of hard silicone grease, which leads to slow fermentation and decomposition. Last year, the rice husk manure bought by Master Liu was directly applied to the shed without fermentative decomposing. Because of the low ground temperature in winter, slow fermentation and slow release of harmful gases from manure, it did not cause significant growth of vegetables. influences. However, with the change of cucumber, soil plowing, the ground temperature rises, the decomposition rate of rice husk manure suddenly increased, once the ventilation is not good, it will cause burning seedlings.
Therefore, when applying the rice husk manure, vegetable farmers are advised to purchase it more than three months in advance, and then build a heap fermentation, or immediately after the spring pod vegetable garden, apply it into the soil, spray the biological agent, and put it in water after high temperature, to promote Manure maturity. It takes a long time for the rice husk manure to ferment and ripen. It is recommended that the peasants turn their piles in a timely manner and can be safely applied after 2-3 months.
Fertilizer needs to be fermented again after high temperature fermentation
Many farmers also reflected: “When we used a lime nitrogen shed, we put rice husk manure and chicken manure together on the soil. However, when we planted vegetables, we found that manure was not decomposed and there was a phenomenon of burning seedlings. Why is this?â€
Many vegetable farmers are accustomed to applying rice husk manure and chicken manure to soil in advance in the summer, and in combination with high-temperature stuffy sheds to promote fermentation of manure, this is a matter of experience and worthy of promotion. However, when the vegetable growers used limestone, methyl bromide and other smoked sheds, although they also passed the process of high-temperature dwellings, the smoked sheds were not only able to kill root-knot nematodes, pathogens, etc. in soil, but also soil. The various beneficial bacteria in the bacteria were killed. Without microorganisms, manure could not be decomposed. Therefore, when the shed is applied to the shed, the larvae can only play the role of sterilizing and killing insects, but they will not achieve the effect of promoting decoction.
Specially remind farmers friends, after using lime nitrogen, methyl bromide and other smoked sheds, they should promptly remove the membrane and ventilate, plowing the soil, and completely disperse the remaining pesticides, and then with the fertility of the water, high biological agents, once again raise the warm stuffy shed, In order to promote the fermentative decomposition of manure.
Different methods of decomposing manure
There are many types of manure, and the methods of fermenting and decomposing are different. Fresh manure, fresh chicken manure and other manure with large water content can be cooked by the following methods: The fermentation tank used cannot be too deep, generally 40-50 cm. I believe many vegetable farmers have such experience, that is, when the fermentation tank is too deep, the upper manure has been decomposed and the lower layer is almost the same as when it was just bought. This is because the fresh manure has a large amount of water, airtight, and microorganisms are difficult to reproduce rapidly. It is recommended that vegetable farmers insert 3-5 bundles of bundled straw per square meter after spraying the decay agent to ensure manure permeability. Adding appropriate amounts of soil, weeds, or biological agents to fresh manure can also promote fermentation.
The moisture content of rice husk manure and dried chicken manure is relatively low, and it is convenient to use. The farmers can ferment according to the following methods: If it is during the summer season, the shed time is long and it is recommended that it be directly scattered into the shed, and there should be no direct sunlight in the morning or evening. When spraying biological agents, and immediately turn the ground, watering, with high temperature stuffy shed to complete the maturity of manure. If the time of the break is short, such as using dry manure in winter, you should build a heap of rot beforehand by adding enough water to the manure to make the manure wet. Then, according to the bottom width of 1.5-2 meters, the upper part is 1.2 inches wide. - 1.5 meters, height 1-1.2 meters to build a heap, spray once every 15-20 centimeters of biological agent, and then use the diameter of 6-8 cm in the top of the wooden rod hole, deep to the bottom of the heap, interval 20-25 cm One to ensure the oxygen supply during manure fermentation. When the manure ferments, the vegetable farmer should pay attention to the temperature measurement. When the temperature of 20 cm below the surface of the dunghill reaches 60° C. and maintains for 1-2 days, it is turned and water is added. After 3-4 times of manure odor, it indicates that the manure is completely cooked. Can be used with confidence. Pay attention to the temperature of the dung heap can not exceed 80 °C to prevent high temperature burning, resulting in failure of fermentation.
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