Humic acid granular fertilizer refers to an organic fertilizer made from peat (charcoal), lignite, and weathered coal as the main raw materials. Humic acid is an organic substance accumulated by a series of transformation processes such as weathering, microbial decomposition, and changes in the earth, and it is widely found in peat, lignite and weathered coal. Humic acid consists of carbon, hydrogen, oxygen, sulfur and other elements, but also a large number of trace potassium, ammonium, magnesium, iron, manganese, copper, zinc and other trace elements, applied to the soil after continuous supply of nutrients for the plant . Humic acid also contains a large amount of organic matter, not only has the multifunctional function of farmyard manure, but also has the quick-effect characteristics of chemical fertilizer, so it is called a multifunctional organic-inorganic compound fertilizer.
1 Application effect
From 2004, the author chose humic acid granular fertilizer produced in Jixi City, Heilongjiang Province, in soybeans (North Feng 10), wheat (g 813), corn (Jidan 4), potato (Kexin 12) and other crops. On the application, the increase in production is more obvious. In 2004, 2.5 hm2 was applied to soybeans, and the yield per hectare was 2500 kg, which was 8.7% higher than the control. The application of wheat was 28.5 hm2, and the hectare yield was 3850 kg, which was 8.1% higher than the control. In 2005, it was tested in Keshan Farm in Heilongjiang Province, Shenyang Air Force Food Base, Keshan, Nehe and other places. The average increase in soybean production was 8.5%, and the increase in potato production was 18.0%. The Heilongjiang Land Reclamation Bureau 93 Branch has been widely promoted since 2000, and the soybean application area has reached more than 133,000 hm2, increasing production by 2.0% to 18.5%.
2 How to use and precautions
a. Humic acid granular fertilizer is suitable for application in crops with longer growth periods. Such as soybean, corn, potato, sugar beet and other crops, can play a more effective characteristics. Continuous application for many years in the same block has a more significant effect, and it has an improved soil effect on barren land.
b. Use humic acid granular fertilizer to replace 25% to 30% of chemical fertilizers and use them with chemical fertilizers. For example, if 120 kg of diammonium phosphate, 70 kg of urea, and 40 kg of potassium sulfate are used per hectare, and combined with humic acid granular fertilizer, the application of chemical fertilizer in hectares can be reduced to 80 kg of DAP, 40 kg of urea and 20 kg of potassium sulfate. Each hectare can save costs 80 to 100 yuan (humic acid granular fertilizer by 1200 yuan / t pricing).
c. Humic acid granular fertilizer can be used as base fertilizer and seed fertilizer, and it can not be used as top dressing. When used as a fertilizer, the same chemical fertilizer is mixed and mixed to form a deep layer with a depth of 7 to 14 cm. If it is used as a base fertilizer, it can be ridged in the spring and autumn, and the ridge body can be used to fertilize the soil. Humic acid cannot be used alone, nor can it completely replace chemical fertilizers.
3 function characteristics
a. Fertilizer fertility, improve soil physical and chemical properties. The long-term application can make the soil fertile, especially the barren land and many years replanting the soybean field, the effect is more significant.
b. Improve the utilization of fertilizers, preserve nitrogen, increase phosphorus, activate potassium and trace elements, and strengthen the absorption of nutrients. During the whole growth period of a crop, the company continuously provides various nutrients needed for crop growth, and it is not easy to deferrable in the later period.
c. Promote the development of roots, preserve strong seedlings, accelerate the metabolism of plants, promote the accumulation of organic matter, and improve the nutritional status of crops.
d. Maintain water and drought, increase ground temperature, enhance the resistance of plants, reduce pests and diseases, and promote early maturing.
e. Increase the microbial communities in the soil, alleviate the pollution of heavy metal ions in the soil, and slow down the phytotoxicity.
f. The lower cost can reduce the input cost of fertilizer. (022)
(Agricultural and Sideline Industry Base, Naval Logistics Department, Chinese People's Liberation Army, Nehe, Heilongjiang 161331, China)
Excerpt from: 2007.1 (16) Modern Agriculture (Jiamusi)
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