Effect of Water Supply on Spectral Traits and Their Relationship with the Productivity of Sweet Corns
| Autor: | Krisztina Molnár, Csaba Rácz, Eszter Nemeskéri, Attila Dobos, Lajos Helyes |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Canopy nutritional quality Deficit irrigation lcsh:S Ripening 04 agricultural and veterinary sciences normalized vegetation differential index 01 natural sciences Normalized Difference Vegetation Index lcsh:Agriculture SPAD Horticulture Yield (wine) 040103 agronomy & agriculture 0401 agriculture forestry and fisheries sweet corn Leaf area index water deficiency Sugar Agronomy and Crop Science 010606 plant biology & botany Mathematics Hybrid |
| Zdroj: | Agronomy, Vol 9, Iss 2, p 63 (2019) Agronomy Volume 9 Issue 2 |
| ISSN: | 2073-4395 |
| Popis: | Three super-sweet corn hybrids (Zea mays L. convar. saccharata) with different ripening characteristics were grown in three water supplies (regularly irrigated, deficit-irrigated, and unirrigated) to examine the spectral reflectance at leaf and canopy levels, leaf area index (LAI) during the stage of development and their relationship with the yield and nutritional quality. Under unirrigated conditions, the plant&rsquo s height, diameter, and weight of ears per plants, as well as total carotenoid content of kernels, decreased, SPAD values of leaves, normalized vegetation differential index (NDVI) and LAI were low. The difference in SPAD and LAI was higher between the hybrids during the silking than the tasseling period under water deficiency. Under unirrigated dry conditions, no correlation was found between SPAD, NDVI, and yield. Using deficit irrigation, SPAD measured during tasseling correlated closely with the individual husked ear and the final yields as well as the sugar and carotene contents of kernels. Under this condition, NDVI did not correlate with the yield, but LAI was correlated with the yield and its carotene content. Under deficit irrigated conditions, the 46 to 49 range of SPAD measured during tasseling predicted 23.5 to 26.7 t ha&minus 1 depending on the hybrid, but this range predicted a yield lower by 6.4 to 10.1% during silking. |
| Databáze: | OpenAIRE |
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