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Combined Effects of Water and Nitrogen on Growth, Biomass, and Quality of Spinach (Spinacia oleracea Linn.)
- Zhang, Jinxiu, Zhang, Yi, Cao, Linkui
- Communications in soil science and plant analysis 2016 v.47 no.1 pp. 32-40
- Spinacia oleracea, biomass, field experimentation, nitrates, nitrogen, nitrogen fertilizers, oxalates, oxalic acid, plant growth, soil water, spinach, water supply, water treatment
- Water scarcity and nitrate contamination have caused considerable attention to environmental matters. Water and nitrogen interactions have critical impacts on their use efficiency, plant growth, and quality. In a field experiment, a combination of three water treatments and three nitrogen rates was applied to determine their interactive effects on the growth of spinach. Soil water supply that was too low [W ₃N ₁ (the combination of water treatment 3 and nitrogen treatment 1), W ₃N ₂] could cause an increase in nitrate content. Oxalate contents would increase when water and nitrogen were either inadequate (W ₃N ₀, W ₃N ₁) or too high (W ₂N ₂). The most profit from spinach was obtained in plots that received water treatment 2 and nitrogen fertilizer 78 kg N ha ⁻¹. However, considering nitrogen treatments could affect the nitrate and oxalic acid, application of water treatment 2 and 39 kg N ha ⁻¹ nitrogen fertilizer could get better spinach quality.