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- W2983490819 abstract "Effects of conventional and optimized water and nitrogen managements on spinach (Spinacia olerocea L.)growth and soil mineral N (Nmi.) residues were compared in an open field experiment in which water balancemethod and N recommendation with the KNS-system were included. It was shown that the conventionalwater treatment (seasonal irrigated amount: 175 mm) reduced spinach growth compared to the water balancetreatments (seasonal irrigated amount: 80 and 85 mm) at the same N supply level due to N loss throughleaching caused by excessive water supply. Although 309 kg N ha-1 was applied in the conventional Ntreatment, compared to 82 and 66 kg N ha-l in the optimum N treatments, no significant difference in cropyield was investigated between the N treatments with the same irrigation practice. N uptake in spinach andsoil residual Nmin contents were also significantly affected by the irrigation practices. The conventional watersupply not only decreased water use efficiency, but also resulted in excessive NO3-N being leached below theroot zone. In order to meet the same target value of N requirement for the next crop, cauliflower, based onthe KNS-system, at least extra 50 kg N ha-1 was needed in the conventional water treatments in comparisonto the water balance treatment." @default.
- W2983490819 created "2019-11-22" @default.
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- W2983490819 date "2002-01-01" @default.
- W2983490819 modified "2023-09-25" @default.
- W2983490819 title "Effects of Water and Nitrogen Supplyon Spinach（Spinacia oleracea L．）Growth and SoilMineral Residues" @default.
- W2983490819 hasPublicationYear "2002" @default.
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