IPI International Potash Institute
IPI International Potash Institute

Scientific abstracts

Title:
Nitrogen, Phosphorus, and Potassium Effects on the Physiology and Biomass Yield of Baby Spinach (Spinacia oleracea L.)
Authors:
Lufuno Ethel Nemadodzi, Hintsa Araya, Mpumelelo Nkomo, Wonder Ngezimana, and Nixwell Fhatuwani Mudau
Published in:
Journal of Plant Nutrition 40(14):2033-2044 (2017), English

Abstract:

Baby spinach is a relatively new crop of commercial significance in South Africa with considerable health attributes. Three parallel trials to investigate its response to nitrogen (N), phosphorus (P), and potassium (K) were conducted. N and P (0, 45, 75, 105, and 120 kg·ha−1) and K (0, 63, 85, 127, and 148 kg·ha−1) treatments were applied to baby spinach in a randomized block design with four replications. After the parallel trial, NPK combination trial was also done. The biomass yield, chlorophyll content, and leaf area index increased significantly with increase in N and P rates; K had no effect on the yield, chlorophyll content, stomatal conductance, and leaf area index. Yield and chlorophyll content peaked at 75 kg·ha−1 of N/P but growth was best optimized at the NPK combination of 45:45:60 kg·ha−1.

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