Organic fertilizer is made from the residues of organisms(such as animal manure,humus)or plants(such as leaves,straw)through the process of decomposition,which contains a large amount of organic substances,trace elements and microorganisms.Organic fertilizer can improve the soil structure,promote the growth of soil microorganisms,improve the water absorption and permeability of soil,improve the disease resistance of crops,and can be used as the source of plant nutrients.However,due to the slow release of nutrient elements in organic fertilizer,it needs to be decomposed in advance and applied appropriately.
Compound fertilizer is made by mixing various elements according to a certain proportion,including main nutrients(such as nitrogen,phosphorus,potassium)and trace elements.Compound fertilizer has the advantages of high content of nutrient elements,fast release of nutrient elements and wide application range,so it is commonly used in agricultural production.However,if the compound fertilizer is not used properly,it may pollute the soil and the environment.Therefore,it is necessary to pay attention to the appropriate amount and reasonable proportion when applying it.