Journal article

Publication year: 2022

Pages: 4739-4751

Journal: Journal of Soil Science and Plant Nutrition

Volume number: 22

Issue number: 4

ISSN: 0718-9508

eISSN: 0718-9516

DOI Link: https://doi.org/10.1007/s42729-022-00956-z

Publisher: Springer

Abstract: 
Understanding of feedbacks between plant N uptake and soil N transformations in different vegetable production systems is crucial to increase vegetable N acquisition and improve N fertilizer management. (15) N tracing pot experiments were conducted under greenhouse (GH) and open-field (OF) conditions; plant N uptake and soil gross N transformation rates were simultaneously quantified using the Ntrace(plant) tool. The feedbacks of plant N uptake on rhizosphere soil gross N transformations differed between GH and OF. Higher plant NH4+ and NO3- uptake rates were observed in GH compared to OF, which were associated with higher plant biomass in GH. Rhizosphere soil mineral N production rates (i.e., the sum of mineralization and heterotrophic nitrification rates) in GH ranged from 0.18 to 1.53 mg N kg(-1) day(-1) and were significantly lower than in OF (0.60 to 4.56 mg N kg(-1) day(-1)). The reduced rhizosphere soil mineral N production rates in GH were attributed to high soil moisture conditions and vegetable activities (especially respiratory activity in rhizosphere). Rhizosphere soil microbial N immobilization rates in GH were 1.6-166.5 times lower compared to OF, which was line with decreased mineral N production rates and enhanced plant N uptake rates. This was also confirmed by the fact that the microbial N immobilization rates showed a negative correlation with the mineral N production rates and the N uptake rates of plants. We showed that the capacity of soil rhizospheric mineral N supply was weaker in GH than OF, which was one of the reasons why more N fertilizer was required to achieve rapid vegetable growth in greenhouse vegetable production. We also highlighted the importance of water management to improve rhizosphere soil N supply in greenhouse vegetable cultivation.

Harvard Citation style: Dan, X., He, X., Zhao, C., He, M., Chen, S., Meng, L., et al. (2022) Greenhouse Vegetable Cultivation Weakens the Capacity of the Rhizosphere to Supply Soil Mineral N, Journal of Soil Science and Plant Nutrition, 22(4), pp. 4739-4751. https://doi.org/10.1007/s42729-022-00956-z

APA Citation style: Dan, X., He, X., Zhao, C., He, M., Chen, S., Meng, L., Zhang, J., Cai, Z., & Mueller, C. (2022). Greenhouse Vegetable Cultivation Weakens the Capacity of the Rhizosphere to Supply Soil Mineral N. Journal of Soil Science and Plant Nutrition. 22(4), 4739-4751. https://doi.org/10.1007/s42729-022-00956-z