http://www.cnr.it/ontology/cnr/individuo/prodotto/ID43004
Evaluation of LAI-2000 for leaf area index monitoring in paddy rice (Articolo in rivista)
- Type
- Label
- Evaluation of LAI-2000 for leaf area index monitoring in paddy rice (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.fcr.2006.04.002 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Stroppiana D.; Boschetti M.; Confalonieri R.; Bocchi S.; Brivio P.A. (literal)
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- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Stroppiana D.; Boschetti M.; Brivio P.A.: CNR-IREA;
Confalonieri R.; Bocchi S.: Univ. Statale di Milano, Agraria, Milano (literal)
- Titolo
- Evaluation of LAI-2000 for leaf area index monitoring in paddy rice (literal)
- Abstract
- Leaf area index (LAI) is a variable of primary importance for crop monitoring and it is usually measured by labor intensive destructive field
sampling. Indirect non-destructive estimates by optical instruments are a competitive alternative to direct methods for frequent measurements
and over large areas. The work presented here evaluated the adequacy and the range of reliability of the LAI-2000 estimates for rice (Oryza
sativa L.) by comparison with LAI measurements derived by destructive sampling. Field data were collected in 2004 for an Indica type variety
grown under different levels of nitrogen fertilization. The comparison showed that LAI-2000 estimates and destructive LAI measurements are
well correlated (R2 > 0.8) whereas the correlation decreases when LAI values are lower than one (R2 < 0.6). Moreover, when LAI > 1, the
estimates derived by discarding the wide angle reading (fifth ring) of the optical instrument are closer to the actual LAI values compared to the
standard LAI-2000 outputs. The regression line is, in fact, not statistically different (P = 0.25) from the 1:1 line. In these application
conditions, LAI-2000 estimates are correct within +-32%. Therefore, if the range of applicability is restricted to LAI values greater than one
and the wide angle readings are discarded, LAI-2000 is an appropriate instrument for in situ LAI estimation in paddy rice fields. (literal)
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