Next Article in Journal
Identification of Reference Genes for Quantitative Gene Expression Studies in Pinus massoniana and Its Introgression Hybrid
Previous Article in Journal
Environmental Controls of Diurnal and Seasonal Variations in the Stem Radius of Platycladus orientalis in Northern China
Open AccessArticle

Efficiency of the CL, DRIS and CND Methods in Assessing the Nutritional Status of Eucalyptus spp. Rooted Cuttings

1
Department of Soils and Fertilizers, São Paulo State University ‘Júlio de Mesquita Filho’, 14884-900 Jaboticabal, Brazil
2
Embrapa Rondônia, 76815-800 Porto Velho, Brazil
3
Department of Plant Production, São Paulo State University ‘Júlio de Mesquita Filho’, 14884-900 Jaboticabal, Brazil
*
Author to whom correspondence should be addressed.
Forests 2019, 10(9), 786; https://doi.org/10.3390/f10090786
Received: 28 May 2019 / Revised: 25 June 2019 / Accepted: 2 July 2019 / Published: 9 September 2019
(This article belongs to the Section Forest Ecology and Management)
The efficiency of methods in adequately interpreting the nutritional status of Eucalyptus spp. rooted cuttings remains unknown. The aim was to evaluate the quality of diagnoses obtained using the critical level (CL), diagnosis and recommendation integrated system (DRIS) and compositional nutrient diagnosis (CND) methods to assess the nutritional status of Eucalyptus spp. rooted cuttings, based on two different yield indicators. The data were obtained from commercial nursery and calibration experiments, using seven nutrients as treatments (N, P, K, Mg, Ca, B and Fe) and four concentrations per nutrient, arranged in randomized blocks, with four repetitions. The Eucalyptus spp. clone used in the experiments was AEC 0144. A total of 222 rooted cuttings were obtained from the experimental area and commercial nurseries and the following were determined: leaf nutrient content, whole plant dry matter (DM) content and the Dickson quality index (DQI). Diagnostic accuracy in the experimental plots was ascertained by comparing the diagnosis with plant response as a function of adding the corresponding nutrient. Five measures of accuracy were used to test the efficiency of the diagnostic methods: total accuracy, accuracy for deficiency and sufficiency, deficiency ratio, efficiency ratio, and the net increase in in DM and DQI. The performance of diagnostic methods varied between CL, DRIS and CND, and among the nutrients studied. Given that the seedling production system is largely more controlled, where environmental variations are minimal, and considering that the different diagnostic methods exhibited distinct performance in terms of assessing the true nutritional status of eucalyptus rooted cuttings, the CL method is the most indicated for this situation, due to its better performance in evaluating the nutritional status of most nutrients and easy implementation. View Full-Text
Keywords: forest species; rooted cuttings; increased yield; leaf diagnosis; nutritional diagnoses forest species; rooted cuttings; increased yield; leaf diagnosis; nutritional diagnoses
Show Figures

Figure 1

MDPI and ACS Style

Morais, T.C.B.; Prado, R.M.; Traspadini, E.I.F.; Wadt, P.G.S.; Paula, R.C.; Rocha, A.M.S. Efficiency of the CL, DRIS and CND Methods in Assessing the Nutritional Status of Eucalyptus spp. Rooted Cuttings. Forests 2019, 10, 786.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop