Spinach yield and its nitrate content as affected by salinity and nitrogen and potassium fertilization | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 3, Issue 1, June 1991, Pages 114-129 PDF (2.44 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.1991.461565 | ||
| Authors | ||
| M. S. A. Soliman* 1; M. Doss2 | ||
| 1Soil Salinity Laboratory, Bacos, Alexandria, Egypt. | ||
| 2Horticulture Department, Alexandria University, Alexandria, Egypt. | ||
| Abstract | ||
| Two field experiments were carried out to investigate the effect of salinity in irrigation water, N-and K-fertilizers on fresh yield, total nitrogen, nitrate, reduced sugar contents and actual and potential nitrate reductase activity in spinach (Spinacia oleracea L.). Salinity reduced remarkably all above parameters except reduced sugar which thereby was increased. Nitrogen fertilization increased yield parabolically, total nitrogen linearly, NO3- exponentially, potential and actual nitrate reductase activity slightly, but noticeably decreased reduced sugars. Splitting N-fertilizer improved fresh yield but was indifferent to NO3- and reducing sugars. Splitting K-fertilizer also improved the yield but decreased both NO3- and reducing sugar. Significant first order interactions of the experimental parameters were discussed. | ||
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