is a plant nutrient that is needed
in relatively large quantities. Some of these include: nutrient elements
Nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), Magnesium (Mg),
sulfur (S).
ADVANTAGES AND DISADVANTAGES OF
MACRO ELEMENTS
1.
Nitrogen (N) Nitrogen plays a role
in the formation of cells, tissues, and organs of plants. It serves as as
synthetic materials of chlorophyll, protein, and amino acids. Therefore his
presence was needed in large quantities, especially during vegetative growth.
Along with phosphorus (P), nitrogen is used to regulate plant growth overall.
There are two forms of nitrogen and ammonium nitrate IE. A number of researches
proving the ammonium should not more than 25% of the total nitrogen
concentration. If overdone, the figure quickly but the plants susceptible to
the attack of the disease. Nitrogen derived from ammonium will slow down growth
because it binds carbohydrates so that supply is a little bit. Thus the food
reserve as capital flowering also minimal. As a result of the plant is not
capable of flowering. If nitrogen is the dominant form of nitrates, then plant
cells will be compact and powerful that is more disease resistant. To know the
content and the form of nitrogen N fertilizer can be seen from the packaging a)
lack of nitrogen-deficient Plants known from the lower part of the leaf. That
leaves yellowing due to lack of chlorophyll. Further drying and loss. The bones
below the surface of the leaves look pale. Plant growth is slow, weak and
stunted. Flower and seed production is low. b) Excess color of the leaves is
too green, leafy plant with leaves. The process of disposal being long. Addendum
designate is sekulen because it contains a lot of water. It causes attacks of
Boletus and diseases vulnerable, and easily collapsed. Flower production is
declining.
2.
Phosphorus (P), Phosphorus is a
component of the compiler of several enzymes, proteins, ATP, RNA, and DNA. ATP
is important to the process of energy transfer RNA and DNA, while in determines
the genetic traits of the plant. Element P may have contributed to the growth
of the seed, root, flower, and fruit. By improving the structure of rooting so
any nutrients absorption better. Along with potassium, phosphorus is used to
stimulate flowering. It is natural because the plant needs against increased phosphorus
high when the plant will bloom. a) Deficiency starts from old leaves become
purplish tend to gray. The edges of the leaves are Brown, bone colored dark
green leaves. Scorched, tiny leaves, stunted growth, and eventually fall out.
Phase of slow growth and Dwarf plants. b) Excess Excess P causes the absorption
of other elements especially micro elements such as iron (Fe), copper (Cu) and
zinc (Zn) is interrupted. But the symptoms are not physically look at the
plant.
3.
Potassium (K) Potassium acts as a
regulator of plant physiology processes such as fotosintetis, accumulation,
translocation, carbohydrate transport, opening closed stomata, or manage water
distribution in tissues and causes this item defects as burn and leaves finally
fall. Elemental potassium is closely related to calcium and magnesium. There is
antagonism between properties of potassium and calcium. And also between
potassium and magnesium. The nature of antagonism led to the defeat of one of
the elements to be absorbed if the plant composition is unbalanced. Elemental
potassium is absorbed more quickly by the plant compared to calcium and
magnesium. If the element potassium deficiency symptoms are the same as excess
magnesium. Because of the nature of the antagonism between potassium and
magnesium greater than nature of antagonism between potassium and calcium.
However, in some cases, the excess potassium symptoms are similar to plants
lack calcium. a shortage of K Deficiency) is visible from the very bottom of
the dried leaves or there are patches of charred. Easy flower loss. The edges
of the leaves ' charred ', the leaves are rolled down, and prone to bouts of
illness. b) Excess Excess K causes the absorption of Ca and Mg. Stunted plant
growth. So the plant is deficient.
4.
Magnesium (Mg) Magnesium is the
activator that plays a role in energy transport of some enzymes in plants. This
is a very dominant element of its existence in the leaves, especially for the
availability of chlorophyll. So the adequacy of magnesium is indispensable to
facilitate the process of photosynthesis. An element that is also a core
component of enzymes and chlorophyll formation in different process of protein
synthesis. Magnesium deficiency causes a number of elements are not go because
the energy is available. That is simply a weighted item carried by the ' light
' such as nitrogen. As a result formed cells are large but dilute. The tissue
becomes weak and the distance between the segment length. Traits just as
symptoms of etiologic-light deficiencies at the plant. a) Deficiencies Appear
yellow splotches
