Light-response characteristics of photosynthesis of drip-irrigated sugar beet under different nitrogen fertilizer managements
| Autor: | C. FEI, J.X. SU, Y.Y. LI, Z.F. LI, K.Y. WANG, H. FAN, F.Y. MA |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Photosynthetica, Vol 57, Iss 3, Pp 804-811 (2019) |
| Druh dokumentu: | article |
| ISSN: | 0300-3604 1573-9058 |
| DOI: | 10.32615/ps.2019.089 |
| Popis: | Effects of two split application ratios of nitrogen fertilizer (R1: half of the total nitrogen fertilizer was applied on 13 June, and the rest was applied on 1 July; R2: two equal amounts of N fertilizer accounting for 70% of total were applied on 15 June and 1 July, respectively, and the rest was applied on 1 August) and three N fertilizer application rates (75, 150, and 225 kg ha-1) on chlorophyll content, photosynthetic characteristics, and root yield of sugar beets were studied. The results showed that with N fertilizer application rates of 150 and 225 kg ha-1, R2 treatment significantly decreased light-compensation point, but increased light-saturation point and actual photochemical efficiency at the storage root development compared to R1 treatment. The R2 treatment with the N fertilizer application rate of 150 kg ha-1 significantly increased sugar yield by 5-29% compared to other treatments. |
| Databáze: | Directory of Open Access Journals |
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