Vol. 7, Special Issue 6 (2019)
Production and quality of baby spinach (Spinacia oleracea L.) as influenced by NO3-: NH4+ ratios and cutting management grown in a soilless culture system
Author(s): U Thapa, S Nicola and G Tibaldi
Abstract: The present experiment was conducted on baby spinach variety Knightwalk in the Experimental Centre, University of Torino, Carmagnole, TO, Italy in glass house during the period of January – March, 2011- 2012. The objective of this study was to determine the influence of Cutting management during the different harvesting interval and the ratio of NO3-: NH4+ on growth yield and the distribution of inorganic elements within the tissues of Spinach grown in soilless culture systems. The spinach was grown in floating systems and nitrogen was supplied at three ratio of NO3-: NH4 with same total N level of 10mmolL-1 and two cutting height were adopted at the time of harvesting. Increasing the rate of NO3- and decreasing the rate of NH4+ within the nutrient solution significantly increased the fresh weight production but this effect was most pronounced in the nitrate, phosphate, sulphate and oxalate content in the leaf. Dry matter was higher where ammonium nitrogen concentration was increased and obtained 14.6491 percentage with 20:80 ratio of NO3-: NH4+. There were no significant effect on number of leaves and chloride content with these treatments. The higher concentration of nitrate and oxalate were found in 60:40 ratio of NO3-: NH4+ which were within the limitation as allowed by EU regulation for Spinach. Cutting management was not significantly influenced on accumulation of elements in the leaves. However the accumulation of nitrate was found higher when the plants were cut just above the surface of the plants with petioles. It was reverse in case of oxalate content and was noted that higher concentration of oxalate were found when the plants were cut at the top of the plants without petioles.
Pages: 874-879 | 477 Views 66 Downloads
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How to cite this article:
U Thapa, S Nicola and G Tibaldi. Production and quality of baby spinach (Spinacia oleracea L.) as influenced by NO3-: NH4+ ratios and cutting management grown in a soilless culture system. International Journal of Chemical Studies. 2019; 7(6): 874-879.
