6. Foliar Diagnosis and Fertiliser Prescription in Forestry—The DRIS System and its Potential

Schutz, C. J.; Villiers, J. M. De

doi:10.1080/00382167.1987.9630254

Cited by 11 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The upper crown foliage of tapped trees was sampled in mid-July (using a 12-gauge choke bore shotgun with a telescopic sight) to be analyzed for nutrient concentration (19,20) and starch (21,22). Foliar nutrient concentration data were combined with growth measurements from dendrometer bands to calculate DRIS indices to determine limiting nutrients (23,24,25).…”

Section: Field Experimentation and Chemical Analysesmentioning

confidence: 99%

Methods to investigate fertilization as a means to improve growth and sugar yield of sugar maple

Leech

Kim

1990

Communications in Soil Science and Plant Analysis

View full text Add to dashboard Cite

In a randomized block experiment, NPKCa fertilizers were applied annually for 5 years to a mature sugar maple (Acer saccharum Marsh.) woodlot in southern Ontario. Trees selected from 3 crown classes were fitted with dendrometer bands, tapped for sap and analyzed for foliar starch and nutrients and sap nutrients. Crown classes responded differently to the fertilizers. Trees which responded significantly in diameter growth did not respond the most in sugar yield. Effects of the fertilizer treatments on sugar yield were shown to be significant when the area of crown overlap of competing trees was subtracted from the crown area of crop trees. Foliar analysis and DRIS showed which nutrients were in demand after fertilizer applications. Sap analysis showed significant relations between sap nutrients and between sap nutrients and diameter growth. Starch analysis showed significantly higher foliar starch concentrations after potassium fertilization than after other fertilizer treatments.

show abstract

Section: Field Experimentation and Chemical Analysesmentioning

confidence: 99%

Methods to investigate fertilization as a means to improve growth and sugar yield of sugar maple

Leech

Kim

1990

Communications in Soil Science and Plant Analysis

View full text Add to dashboard Cite

show abstract

“…En los diagnósticos nutrimentales de vegetales a partir del follaje se utilizan varios procedimientos, de los cuales el DRIS (Diagnosis and Recommendation Integrated System) ha mostrado en la mayoría de los casos una amplia capacidad predictiva en especies forestales (Leech y Kim, 1981;Schutz y de Villiers, 1986;Svenson y Kimberley, 1988;Hockman y Allen, 1990;Kopp y Burger, 1990). La relativa precisión de esta técnica en el diagnóstico nutrimental puede acortar en forma importante la estancia de las plántulas en el vivero, reduciendo obviamente los costos de producción.…”

Section: Introductionunclassified

Diagnóstico de necesidades de fertilización de Abies religiosa (H.B.K.) Schl. et Cham. en vivero mediante el DRIS

Chávez¹,

López

Botello

et al. 2016

MYB

View full text Add to dashboard Cite

Con la finalidad de conocer los requerimientos de fertilización en vivero, se generaron normas DRIS (Diagnosis and Recommendations Integrated System) para Nitrógeno (N), Fósforo (P) y Potasio (K) en plántulas de Abies religiosa (H.B.K.) Schl. et Cham. en invernadero. Utilizando un diseño experimental factorial con arreglo completamente al azar se fertilizó con tres niveles de cada nutrimento. Los resultados indican que el DRIS predice acertadamente las necesidades de fertilización. Es probable que el uso de normas más precisas ayude a obtener mayores incrementos de altura en el vivero.

show abstract

“…Index values are calculated for each nutrient in the analysis using the following formulae [22,26,30,31] :…”

Section: Dris Index Calculationsmentioning

confidence: 99%

Dris Analysis Identifies A Common Potassium Imbalance In Sweetgum Plantations

Coleman

Chang

Robison

2003

Communications in Soil Science and Plant Analysis

View full text Add to dashboard Cite

DRIS (Diagnosis and Recommendation Integrated System) analysis was applied to fast-growing sweetgum (Liquidambar styraciflua L.) plantations in the southeast United States as a tool for nutrient diagnosis and fertilizer recommendations. First, standard foliar nutrient ratios for nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) were established using high-yield stands from a region-wide sweetgum DE-AI09-00SR22188JOURNAL ARTICLE 2003 03-22-P fertilization study. DRIS indices were then calculated for the low-yield stands in the same study and stands from four other studies to evaluate foliar nutritional characteristics. Low-yield stands showed strong negative K imbalance, indicating insufficient K, but also showed strong positive Mg imbalance. Potassium imbalance was also observed in the other four data sets tested. DRIS analysis successfully identified the tendency for K insufficiency to increase from early to late in the growing season, probably due to K foliar leaching and low soil K supply. While insufficient N was common in all the stands tested, the DRIS analysis failed to identify any P imbalance. We recommend that K be applied in N:K ratios less than one to correct K imbalance problems in the studied sweetgum plantations. Supraoptimal Ca and Mg levels are expected to decline once insufficient N and K are corrected. DRIS analysis provides the means for diagnosing nutrient imbalance and a potential basis for prescribing corrective amendments in sweetgum plantations.

show abstract

6. Foliar Diagnosis and Fertiliser Prescription in Forestry—The DRIS System and its Potential

Cited by 11 publications

References 13 publications

Methods to investigate fertilization as a means to improve growth and sugar yield of sugar maple

Methods to investigate fertilization as a means to improve growth and sugar yield of sugar maple

Diagnóstico de necesidades de fertilización de Abies religiosa (H.B.K.) Schl. et Cham. en vivero mediante el DRIS

Dris Analysis Identifies A Common Potassium Imbalance In Sweetgum Plantations

Contact Info

Product

Resources

About