DRIS analysis identifies a common potassium imbalance in sweetgum plantations. [electronic resource]
Diagnosis And Recommendation Integrated System; Dris; Sweetgum: Liquidambar Styraciflua; Nutrient Imbalance.
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| Online Access: |
Online Access |
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| Corporate Authors: | , |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Dept. of Energy. Office of Environmental Management ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
2003.
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| Subjects: |
| Summary: | Diagnosis And Recommendation Integrated System; Dris; Sweetgum: Liquidambar Styraciflua; Nutrient Imbalance. |
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| Abstract: | 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 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. Supra-optimal 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. |
| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 01/01/2003. "03-22-P" Communications in Soil Science and Plant Analysis 34 13&14 ISSN 0010-3624; CSOSA2 FT. Coleman, M., D.; Robison, D.J.; Chang, S., X. |
| Physical Description: | 23 pp. : digital, PDF file. |