Identification and Prevention of Crop Fertility

I. Identification of crop damage

The main features of crop damage are as follows:

(1) Dehydration: Excessive fertilization, or excessive drought in the soil, causes high local concentration of soil nutrients after fertilization, resulting in crop water loss and wilting.

(2) Burns: Under high temperature in the hot sun, the use of highly volatile fertilizers (such as ammonium bicarbonate, etc.) causes burns (burning) of the leaves or young tissues of the crop.

(3) Poisoning: The "biuret" in urea is more than 2%, or the free acid content in superphosphate is higher than 5%. After being applied to the soil, it causes root poisoning and rot in crops;

(4) Hysteresis: The application of large amounts of organic fertilizer without decomposition, because of its decomposition of fever and the release of harmful gases such as methane, resulting in poisoning of crop seeds or roots, affecting the growth of crops.

Second, the prevention of crop damage

(1) Seed and fertilizer isolation. When applying seed fertilizer, seed and fertilizer should be segregated to avoid direct contact between fertilizer and seed and cause burning of seedlings.

(2) Reasonable water supply. When the soil is too dry, it is advisable to fertilize the soil first, then fertilize the soil first, or pour the fertilizer into the water. When paddy fields are applied with highly volatile chemical fertilizers, it is advisable to keep the appropriate shallow water layer in the field and apply the cultivating field immediately after the application.

(3) Apply fertilizer evenly. When applying fertilizers, pay attention to uniform application. If necessary, mix suitable amount of clay powder or fine sand.

(4) Apply fertilizer timely. It is generally advisable to control the dry dew after sunrise, or fertilize in the afternoon, and avoid doing it in the air during the hot sun. In addition, we must adhere to the application of sufficient maturity of organic fertilizer, in the process of topdressing chemical fertilizers, pay attention to the unapplied chemical fertilizer placed in the downwind, to prevent its volatile gas is blown to the crop by the wind damage.

(5) If the crops are inadvertently damaged, appropriate measures such as appropriate irrigation and drainage, or removal of affected parts should be promptly adopted to control the development of fertilizer damage and promote the recovery of normal growth.

Anti Inflammation Material

Aspirin [Aspirin, 2-(acetoxy) benzoic acid, also known as acetylsalicylic acid] is a white crystal or crystalline powder, odorless or slightly acetic acid odor, slightly soluble in water, easily soluble in ethanol, can be Soluble in ether and chloroform, the aqueous solution is acidic. This product is a derivative of salicylic acid. After nearly a hundred years of clinical application, it has been proved that it has a good effect on relieving mild or moderate pain, such as toothache, headache, neuralgia, muscle pain and dysmenorrhea. It is also used for colds, flu, etc. Relieving fever of febrile diseases, treating rheumatism and so on. In recent years, it has been found that aspirin has an inhibitory effect on platelet aggregation and can prevent thrombosis. It is clinically used to prevent transient ischemic attack, myocardial infarction, artificial heart valve and venous fistula or other postoperative thrombosis.

Anti-inflammatory effects of drugs, antipyretic and analgesic effects and aspirin

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