Teak Nutrient Disorder Symptoms In a Hydroponic System Correlated With Near-infrared Spectroscopy (NIR) models
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1 Teak Nutrient Disorder Symptoms In a Hydroponic System Correlated With Near-infrared Spectroscopy (NIR) models Andrew Whittier, Camcore, NCSU 3 rd World Teak Conference May, 2015
2 Nutrient Disorder Project Objectives Determine nutrient disorder symptoms and foliar nutrient levels in teak seedlings in order to better diagnose problems Develop photographic guide of symptoms Correlate foliar nutrient analysis results with NIR models in order to develop predictive models for N, P, and K Compare accuracy of handheld field NIR scanner to laboratory NIR scanning
3 4 Part Study A Investigate nutrient solution concentrations, ph, buffer solutions, and germination media for ideal seedling growth B Subject seedlings to nutrient disorders in order to describe and quantify responses and foliar nutrient levels C Scan leaves with handheld microphazir NIR scanner to develop predictive models of deficiencies D Scan leaves with FOSS NIRSystems 6500 to develop predictive models of deficiencies
4 A - Nutrient Concentration Complete Hoagland solution at 100%, 50%, and 10% strength Study was completed winter of 2013 Macronutrients Molarity ml/100l KNO 3 1M 500 Ca(NO 3 ) 2. H 2 O 1M 500 KH 2 PO 4 1M 100 MgSO 4. 7H 2 O 1M 200 KCl 1M nil CaCl 2. 2H 2 O 1M nil NaNO 3 1M nil NaH 2 PO 4. 2H 2 O 1M nil Na 2 SO 4 1M nil MgCl 2. 6H 2 O 1M nil FeDTPA 1M 100 Micronutrients MnCl 2. 4H 2 O 20mM 90 ZnCl 2. 7H 2 O 20mM 15 CuCl. 2H 2 O 20mM 15 H 3 BO 3 100mM 45 Na 2 MoO 4. 2H 2 O 1mM 10 NaOH (ph adj.) 1M ~40
5 Hydroponic Systems Liquid Culture Hydroponics Sand Culture Hydroponics
6 A - Solution Strength 100% strength solution resulted in superior growth 140,0 120,0 100,0 80,0 60,0 40,0 20,0 0,0 Liquid Culture Mean Seedling Ht. Week 0 Week 1 Week 2 Week 3 Week 4 100X 50X 10X 140,0 120,0 100,0 80,0 60,0 40,0 20,0 0,0 Sand Culture Mean Seedling Ht. Week 0 Week 1 Week 2 Week 3 Week 4 Week 5 100X 50X 10X 6,0 5,0 4,0 3,0 2,0 1,0 0,0 Liquid Culture Mean Seedling Dia. Week 0 Week 1 Week 2 Week 3 Week 4 100X 50X 10X 4,5 4,0 3,5 3,0 2,5 2,0 1,5 1,0 0,5 0,0 Sand Culture Mean Seedling Dia. Week 0Week 1Week 2Week 3Week 4Week 5 100X 50X 10X
7 A - ph effect 3 levels of ph: 5.5, 6.0, and 6.5 ph of 6.0 had highest wet plant weight ph of 5.5 had the highest dry plant weight For my research I have a target ph of 5.8 Wet Weight by ph Dry Weight by ph 300,0 290,0 280,0 270,0 260,0 250,0 240,0 230,0 220, ,0 45,0 40,0 35,0 30,0 25,0 20,0 15,0 10,0 5,0 0,
8 A - Solution Buffer 100% Solution, ph 6.0, buffers of Ca(OH) 2 and Na(OH) 2 Na(OH) 2 buffer exhibited superior growth Wet Plant Average Weight (g) Dry Plant Average Weight (g) Ca(OH)2 Na(OH)2 0 Ca(OH)2 Na(OH)2
9 A - Germination Media Both washed concrete sand and an 80:20 peat:perlite (peatlite) media were used in germination Peatlite with added wetting agent and lime used in sand culture in order to have a well defined root plug Sand is preferred in hydroponics due to its ability to wash off roots before transferring to liquid solution
10 A - Germination Media Both washed sand and the peat:peatlite had suitable germination Growth in each media was not significantly different 50,00 Percent Germination at 4 Weeks Height at 4 weeks (cm) 45, ,00 35, , ,00 20, , ,00 5,00 2 0,00 sand peat:peatlilte 0 sand peat:peatlite
11 A - Results 100% Strength Hoagland Solution Target ph of 5.8 Na(OH) 2 buffer For sand culture the peat:peatlite media will be used in order to have a better plug to transplant In liquid culture hydroponics sand will be used for germination due to being easier to wash from roots Results from part A will be used in parts B, C, and D
12 Part B Nutrient Disorder Symptoms Subject 2 provenances of teak seedlings to 12 different elemental disorders Seedlings will be grown in sand culture hydroponics Regular photographs taken to visually describe nutrient disorder symptoms Regular growth measurements will quantify response to deficiencies/toxicities Leaf material will be analyzed for elemental concentrations pre and post deficiency symptom
13 B Sand Culture Nutrient Disorders Nutrients deficiencies tested in greenhouse at NCSU: N, P, K Ca, Mg, S, B, Cu, Fe, Mn, Mo, Zn Boron toxicity will also be examined Study completed fall of 2014
14 B - Disorder Study Data Recorded Biweekly measurements of the following will be taken: Height Root Collar Diameter Number of leaves Date disorder symptom appeared Munsell Color Code for symptomatic and control plants
15 B - Disorder Photographs High quality photographs will visually record plant response to nutrient disorders Descriptive guide of disorders will be developed and distributed to Camcore members Calcium deficiency at 5 weeks
16 B - Floriculture Greenhouse Sand Hydroponics
17 B - Sand Culture Design 252 plants in the sand culture hydroponic setup 2 provenances each with 126 seedlings Each provenance has 6 seedlings split across 13 nutrient treatments and 8 controls
18 B - Foliage Analysis Foliage nutrient levels were analyzed by the North Carolina Department of Agriculture Analysis was done post deficiency appearance for each nutrient Most recent mature leaf used in analysis whenever possible
19 B - Major Nutrient Deficiencies Nutrient Symptom Location Date Observed -Nitrogen -Phosphorus -Potassium -Calcium -Magnesium -Sulfur Small, entire plant yellow Small, yellow/brown tipped leaves Tip burnt leaves, Umbrella Form Dark/necrotic interveinal patches Chlorosis prominent along midrib Brown spots mid. leaves, new leaves pale, cupped down Whole Plant Deficient Plant Foliar Conc. Complete Plant Foliar Conc. 14 Days 0.98% 4.25% Lower 24 Days 0.10% 0.81% Lower 17 Days 1.36% 3.99% Middle 24 Days 0.47% 2.00% Middle 53 days 0.09% 0.64% Top 30 Days 0.10% 0.23%
20 B - Minor Nutrient Deficiencies Nutrient Symptom Location Date Observed Deficient Plant Foliar Conc. Complete Plant Foliar Conc. -Manganese Interveinal chlorosis, white patches Middle 24 Days 13.9 ppm ppm -Iron -Boron Interveinal chlorosis, dark green midrib All Leaves drooping, new leaves necrotic patches Middle 24 Days 34.2 ppm 42.0 ppm Whole Plant 33 Days 2.82 ppm 33.4 ppm +Boron Purple spots Lower 17 Days ppm 27.4 ppm -Copper New leaves narrow, curling down Top 17 Days 2.7 ppm 3.5 ppm -Zinc -Molybdenum Upper leaves long, narrow, cupped down. Leaves feel coarse Middle Leaves chlorotic, straplike form Top 33 Days 11.9 ppm 21.1 ppm Middle 53 days NA 0.69 ppm
21 B - Height Differences by Nutrient 35,00 Height (cm) at 8 weeks 30,00 25,00 20,00 15,00 10,00 5,00 0,00 All N P K Ca Mg S Mn Fe B B+ Cu Zn Mo
22 B - Diagnostic Guide Growth data from nutrient studies, foliar nutrient concentrations, NIR models, and descriptive photographs will be used to create guide Electronic and printed versions English and Spanish versions planned
23 B - Nitrogen Deficiency at 2 weeks 4.25% foliar N 0.98% foliar N
24 B - Copper Deficiency at 7 weeks Cu Deficient: 2.66 ppm foliar Cu Complete: 3.57 ppm foliar Cu
25 Parts C and D: NIR Models of N, P, and K Deficiency
26 C and D- NIR Models of NPK Design 14 treatments, 20 plants each 4 levels of N, P, and K and 2 controls Treatment levels: 25, 50, 75, and 125% of each N, P, and K Handheld and laboratory NIR analysis will be used to develop models of NPK in teak seedlings
27 C Handheld NIR Models of NPK Deficiencies Camcore microphazir NIRscanner was used to scan leaves every 3 weeks NIR models will be developed to predict NPK deficiencies in seedlings Study conducted summer and fall of 2014
28 D Laboratory NIR Models of Nutrient Deficiencies Camcore FOSS NIRSystems 6500 used to scan dried ground teak leaves NIR models will be developed to predict NPK deficiencies in seedlings Material was scanned winter of 2015 with models slated for development summer 2015
29 Project Future Research is complete Currently analyzing data Develop predictive NIR models for N, P, K deficiencies Put together the diagnostic guide Write up findings Hopefully revisit Copper and possibly Molybdenum deficiency symptoms
30 Acknowledgments Drs. Gary Hodge and Juan Lopez, Camcore Dr. Brian Whipker, NCSU Horticulture Professor Dr. Carole Saravitz, NCSU Phytotron Director Ingram McCall, NCSU Horticulture Staff Robert Jetton and the rest of the Camcore Staff Manny De Oca Cede, Camcore workstudy
31 Questions
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