- Sep 22, 2017 -
The role of organic fertilizer: organic fertilizer According to its nutrient content compared with chemical fertilizer, the former is a lot of nutrients, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur and trace elements have, and the latter is a single, nitrogen fertilizer only nitrogen, phosphorus fertilizer only contain phosphorus, potassium fertilizer only potassium, even the compound fertilizer is only nitrogen, phosphorus, potassium and other limited nutrients. However, organic manure contains a variety of nutrients, although complete, its concentration is relatively low, taking chicken feces as an example, its nitrogen content is about 1.6%, the phosphorus content is about 1.5%, the potassium content is about 0.9%, that is 100 kilograms chicken manure nitrogenous (n) 1.6 kg, phosphorus ($literal) 1.5 kg, potassium (K2O) 0.9 kg. Fertilizer urea nitrogen 46%, that is 100 kilograms urea nitrogen (N) 46 kilograms, potassium chloride containing 60%, 100 kilograms potassium chloride contains k2o60 kg, fertilizer contains more nutrients than organic fertilizer. Organic fertilizers contain large amounts of organic matter, which are not found in fertilizers. When organic manure is applied to soil, it is decomposed and decomposed to produce nutrients for crop absorption, and fertilizer can play a role in soil. Therefore, organic fertilizer contains many kinds of nutrients, low concentration, slow release, fertilizer is the opposite, nutrient single, high concentration, release quickly. Both have advantages and disadvantages, organic fertilizer should be combined with the application of chemical fertilizer to avoid weaknesses, and give full play to its benefits.
Organic Fertilizer has the following two aspects:
(1) Improve the soil, fertility. Organic matter is the main substance in organic manure, and the organic matter in soil is increased by applying organic fertilizer. Organic matter can improve soil physical, chemical and biological properties, ripen soil, and fertilize land.
(2) Increase crop yield and improve the quality of agricultural products, amino acids and other substances, nitrogen, phosphorus, potassium and other nutrients, but also contains a variety of sugars, amino acids and other substances, not only to provide nutrition for crops, but also to promote soil microbial activities. Organic fertilizer also contains a variety of trace elements, such as livestock and poultry manure per 100 kilograms containing boron 2.2 ~ 2.4 grams, zinc 2.9 ~ 29.0 grams, Manganese 14.3 ~ 26.1 grams, molybdenum 0.3 ~ 0.4 grams, effective iron 2.9 ~ 29.0 grams. The combination of organic manure and chemical fertilizer can improve the quality of the products, reduce the content of nitrate and nitrite, increase the content of vitamin C and increase the amount of sugar in fruits and vegetables.
Some organic manure to improve soil, fertilizing the role of a larger, such as straw, peat, compost and so on; some organic fertilizers are to supply the main nutrients needed for crops, such as human feces and urine, chicken feces and so on, the difference is mainly depending on the proportion of organic matter and nitrogen content in organic fertilizers. The structure of organic matter is mainly carbon (C), so this ratio is called carbon nitride (N/a), C/N more than 30 of organic fertilizer its role to change the main soil, c/n less than 30 of organic fertilizer its role to supply nutrients mainly. c/N of crop stalks is around 100, in the Earth, the effect of soil amelioration is very great, because the amount of nitrogen contained is very small, it is not only not releasing nitrogen in decomposing process, but also absorbing nitrogen from soil, and adding a little chemical nitrogen to accelerate the process of decay.