In general, the utilization rate of nitrogen in dry land is not high, mainly due to the volatilization of ammonia, leaching of nitrate, and denitrification of nitrogen in the dry land. In order to increase the effect of applying nitrogenous fertilizers in drylands and reduce the loss of nitrogen from nitrogen, special attention should be paid to the following three points when applying nitrogenous fertilizers:
Antipyretic:
Something that
reduces fever or quells it.
There are 3 classes
of antipyretic medications that are sold OTC (over-the-counter) without
prescription:
Salicylates --
aspirin (acetylsalicylic acid), choline salicylate (Arthropan), magnesium
salicylate (Arthriten), and sodium salicylate (Scot-Tussin Original);
Acetaminophen
(Tylenol); and
Nonsteroidal
anti-inflammatory drugs (NSAIDs) -- ibuprofen (Advil), naproxen (Naprosyn,
Aleve), and ketoprofen.
From anti-,
against + the Greek pyretos, fever from pyr, fire. The same root gives rise to
pyrexia, a medical term for fever.
Antipyretic, from
the Greek anti, against, and pyreticus, pertaining to fever, are substances
that reduce fever. Antipyretics cause the hypothalamus to override a
prostaglandin-induced increase in temperature. The body then works to lower the
temperature, resulting in a reduction in fever.
Most antipyretic
medications have other purposes. The most common antipyretics in the United
States are ibuprofen and aspirin, which are used primarily as pain relievers.
Non-steroidal anti-inflammatory drugs (NSAIDs) are antipyretic,
anti-inflammatory, and pain relievers.
Pain-killer:
Painkiller is any
member of the group of drugs used to achieve analgesia, relief from pain.
Analgesic drugs
act in various ways on the peripheral and central nervous systems. They are
distinct from anesthetics, which reversibly eliminate sensation. Analgesics
include paracetamol (known in North America as acetaminophen or simply APAP),
the non-steroidal anti-inflammatory drugs (NSAIDs) such as the salicylates, and
opioid drugs such as morphine and oxycodone.
In choosing
analgesics, the severity and response to other medication determines the choice
of agent; the World Health Organization (WHO) pain ladder specifies mild
analgesics as its first step.
Analgesic choice
is also determined by the type of pain: For neuropathic pain, traditional analgesics
are less effective, and there is often benefit from classes of drugs that are
not normally considered analgesics, such as tricyclic antidepressants and
anticonvulsants.
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The effects of applying nitrogenous fertilizers at different growth stages of crops during key periods are different. Generally speaking, the nitrogen requirement for crops at the seedling stage is not large, and more nitrogen is needed during the heading and fruiting period. For example, before and after flowering, the topdressing nitrogen fertilizer can significantly increase the yield.
Deep application of deep-buried soils combined with cover soil will apply nitrogenous fertilizers to soil layers 6 to 10 centimeters deep under the surface soil, which will reduce the loss of nitrogen volatilization and increase the nitrogen use efficiency. The soil moisture content is suitable. Before the sowing, the ditch is opened and the fertilizer is applied on the underside or both sides of the seed to increase the fertilizer efficiency.
Apply organic manure in combination with organic manure to provide comprehensive nutrients that can improve the soil and improve soil fertility. Dryland applies organic fertilizer all the year round, can fertilize the soil and enhance the ability of the soil to retain water and fertility. For example, single-fertilizer N fertilizers in the drylands may yield higher yields in the short-term, but over time, the soil quality will deteriorate, and the effect of nitrogen fertilizer application will be greatly reduced. The combination of nitrogen fertilizer and organic fertilizer can achieve the purpose of high yield, stable production and high quality.
Dryland nitrogen fertilizer must be obtained