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| Author(s): |
Rodrigo Hiyoshi Dalmazzo Nowaki
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Jaboticabal. 2017-11-29. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal |
| Defense date: | 2017-09-29 |
| Advisor: | Arthur Bernardes Cecílio Filho; Danilo Eduardo Rozane; Léon Etienne Parent |
| Abstract | |
The evaluation of nutritional status through leaf analysis is important, as a complement to soil chemical analysis, for the identification of nutritional imbalance and ancillary fertilizer recommendation. This evaluation becomes even more important when it comes to the tomato industry, one of the vegetables with the highest economic value in Brazil, and that fertilizers represent 18% of the cost of production. For this purpose, concepts of interpretation and diagnosis of nutritional status were developed, such as the Diagnosis and Recommendation Integrated System (DRIS) and Compositional Nutrient Diagnosis (CND), CND-clr (centralized log ratio) and CND-ilr (isometric log rato) approach. Thus, the goal of the implementation of this work was to obtain standards and sufficiency range and compare these methods, from the nutrient data (N, P, K, Ca, Mg, S, B, Cu, Fe , Mn and Zn). When analyzed individually, with the exception of the DRIS, the CND-clr and CND-ilr methods presented good performances and with good calibration parameters of the methods. However, when analyzed together, according to the Mahalanobis distance and the Cate-Nelson partition, all methods, including log transformation of the content, showed no significant difference. (AU) | |
| FAPESP's process: | 13/24447-4 - Diagnosis of nutritional status of tomato to industry |
| Grantee: | Rodrigo Hiyoshi Dalmazzo Nowaki |
| Support Opportunities: | Scholarships in Brazil - Doctorate |