Sensitivities of Stress Indicators for Available Soil Water and Its Salinity and for Sorghum Leaf Water Potential under Drip Irrigation
| Autor: | B. A. Ould Ahmed, Masashi Inoue, Tahei Yamamoto, V. Rasiah |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Communications in Soil Science and Plant Analysis. 39:46-64 |
| ISSN: | 1532-2416 0010-3624 |
| DOI: | 10.1080/00103620701758956 |
| Popis: | The impact of two input amounts, two frequencies, and three salinity levels on the temporal sensitivity of the stress indicators, available soil water (K W ), its salinity (K S ), and leaf water potential of sorghum [Sorghum bicolor (L.)] grown in dune sand in a plastic greenhouse were investigated. The K W for the irrigation input amount equivalent to one‐half of an open pan on a daily basis (EP0.50‐1) ranged from 0.32 to 0.51 compared with 0.51 to 0.98 for the 100% of open‐pan irrigation input on daily basis. The corresponding K S ranges were 0.50 to 0.98 (EP1.00‐1) and 80 to 0.98 for K s . The K W for the three increasing salinity levels (S‐1, S‐2, and S‐3) ranged from 0.68 to 0.96 for S‐1, 0.58 to 0.90 for S‐2, and 0.43 to 0.89 for S‐3, respectively, and from 0.85 to 1.00 for the control. The corresponding K S ranges were 0.89 to 0.98, 0.70 to 0.96, 0.49 to 0.70, and 1.00 to 1.00, respectively. The LWP ranges for the three salinity levels were −1.70 to −0.70 for S‐1, −2.50 to −1.20 for S‐2, −... |
| Databáze: | OpenAIRE |
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