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- Title
EFFECTS OF DIFFERENT NITROGEN APPLICATION STRATEGIES ON THE WATER AND NITROGEN USE EFFICIENCY OF GREENHOUSE TOMATOES (SOLANUM LYCOPERSICUM L.).
- Authors
K. K., NIE; M. Z., ZHANG; Q. J., BAI; Y., LI
- Abstract
Improvements in nitrogen use efficiency (NUE) reduce stress on the environment and improve vegetable production. The effects of the application rate and injection timing of nitrogen (N) on the net photosynthetic rate (Pn), soil enzyme activities, yield (Y), water use efficiency (WUE), and nitrogen use efficiency (NUE) of tomato were studied by conducting an experiment with a split block design in which N was applied at different rates (150 kg·ha-1, N1; 200 kg·ha-1, N2; and 250 kg·ha-1, N3) and timings (first 1/3 of irrigation, S1; middle 1/3 of irrigation, S2; and last 1/3 of irrigation, S3); no N fertilizer was applied in the control. The results showed an appropriate N application rate (i.e., not too high or low) can improve Pn and soil enzyme activity. The Y and WUE of greenhouse tomato increased non-linearly with the increase in N application rate, but NUE first increased and then decreased as the N application rate increased. Compare to S1, S2 and S3 improved the Pn, soil enzyme activities, Y, WUE, and NUE of tomato. These results could be used to promote N conservation and high Y of facility agriculture crops.
- Subjects
WATER efficiency; TOMATOES; SOIL enzymology; FERTILIZER application; GREENHOUSES; NITROGEN; PHOTOSYNTHETIC rates
- Publication
Applied Ecology & Environmental Research, 2021, Vol 19, Issue 4, p3239
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/1904_32393257