Work

Effects of Different Nitrogen Application Strategies on the Water and Nitrogen Use Efficiency of Greenhouse Tomatoes (solanum Lycopersicum L.)

Year: 2021

Type: article

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.

Source: Applied Ecology and Environmental Research

DOI: 10.15666/aeer/1904_32393257

Authors: K.K. NIE, M.Z. ZHANG, Q.J. BAI, Y. LI

Institutions: Xi'an University of Technology, Shaanxi Normal University

Language: English

Topic: Agricultural Science and Fertilization

Subfield: Soil Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: diamond

Funder: National Natural Science Foundation of China