essential plant nutrients plsc-250 chapter 4. 17 essential plant nutrients carbon, hydrogen & oxygen...
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Essential Plant NutrientsPLSC-250Chapter 4
17 Essential Plant NutrientsCarbon, Hydrogen & OxygenPrimary Nutrients ( N, P,K)Secondary Nutrients (S, Mg, Ca)Micro Nutrients(B, Mn, Cu, Zn,Fe, Mo, Cl, Ni)
CHOCarbon- Forms back bone of plants. Photosynthesis is key.Hydrogen- Water transportOxygen-important is respiration.
Primary NutrientsNitrogenFunction-growth and green colorDeficiency- stunted growth, pale yellow older leavesAbsorbed N03-, NH4+
Primary NutrientsPhosphorousStimulates early growth and root formation, promotes seed productionDeficiency-slow growth, purplish colorAbsorbed H2PO4-, HPO42-
Primary NutrientsPotassiumFunction-improves resistance to disease & cold. Aids in CHO productionDeficiency-slow growth,scorched effectAbsorbed-K+
Secondary NutrientsCalciumFunction Aids in movement of CHO in terminal budsDeficiency- Terminal bud dies, blooms shed earlyAbsorbed-Ca2+
Secondary NutrientsMagnesiumFunction-ingredient of chlorophyll aids in translocation formation of oils and fatsDeficiency-yellowing of lower leaves curl upAbsorbed-Mg 2 +
Secondary NutrientsSulfurFunction-aids in the formation of oils and certain proteins.Deficiency-lower leaves yellow-green, stems and roots small.Absorbed SO42-
MicronutrientsZinc ( zinc ion Zn++)It controls the synthesis of indoleacetic acid, an important growth regulator.Deficiency Terminal growth areas are affected first. Citrus & other tree crops.Symptoms decrease in stem length & rosetting of terminal leaves, Reduced fruit buds, Mottled young leaves, Dieback of twigs after first year, Striping or banding on corn leaves.
MicronutrientsIron ( Fe++)An activator for respiration, photosynthesis, and symbiotic nitrogen fixation.Symptoms Interveinal chlorosis of young leaves. Veins remain green except in severe cases., Twig dieback, In severe cases, death of entire limbs or plants.
MicronutrientsManganese (ion Mn++)An activator for enzymes in plant growth.Symptoms Interveinal chlorosis of young leaves. Gradation of pale-green leaf coloration, with darker color next to veins., There is no sharp color distinction between veins & interveinal brown spots or streaks (barley) or necrotic spots (potatoes)
MicronutrientsCopper (ions Cu+ & Cu++)An activator of several plant enzymes & may play a role in Vitamin A production.Symptoms Stunted growth., Dieback of terminal shoots in trees., Poor pigmentation., Wilting & eventual death of leaf tips., Formation of gum pockets around central pith in citrus.
MicronutrientsBoron (boric acid H3BO3)Functions in plants in the differentiation of meristematic tissue.Symptoms Reduced flower or improper pollination., Death of terminal growth, causing lateral buds to develop, producing a witchs broom effect., Thickened,, curled, wilted, & chlorotic leaves., Soft or necrotic spot in fruit or tubers
MicronutrientsMolybdenum (molybdate ion MoO4=)Need by plants to utilize nitrogenSymptoms Stunting & lack of vigor. This is similar to nitrogen deficiency, because of the key role molybdenum in nitrogen utilization., Marginal scorching & cupping or rolling of leaves., Whiptail of cauliflower., Yellow spotting of citrus.
MicronutrientsChlorine (ion Cl-)Required for photosynthetic reaction in plants & regulating cell turgor potential.Symptoms Spotting of leaves of small grains, first on older leaves & more severe toward the tip half of the leaf blade., Delayed maturity.
MicronutrientsNickel (divalent cation Ni++)Used in the conversion of urea to ammonia in plant tissue overall nitrogen metabolism.Symptoms Chlorosis of young leaves., Death of meristem.