Determine relationship of leaf chlorophyll concentration and yeild using chlorophyll meter in sugar beet

Subject Areas : New Finding in Agriculture

Shadi Javaheri ¹ (دانشجوی کارشناسی ارشد زراعت دانشگاه آزاد اسلامی واحد کرج)
Mohamad Abdollahian-Noghabi ² (دانشیار پژوهش موسسه تحقیقات چغندرقند کرج)
Ali Kashani ³ (دانشگاه آزاد اسلامی، واحد کرج، گروه زراعت و اصلاح نباتات، کرج، ایران)
Davod Habibi ⁴ (دانشگاه آزاد اسلامی، واحد کرج، گروه زراعت و اصلاح نباتات، کرج، ایران)
Hmid Noshad ⁵ (مربی پژوهش موسسه تحقیقات چغندرقند، کرج)

Received: 2015-11-26 Accepted : 2015-11-26 Published : 2015-11-26

Keywords: nitrogen, yield, Sugar beet, Chlorophyll meter,

Abstract :

In order to determine relationship of leaf  chlorophyll concentrationand yield and quality using chlorophyll meter in sugar beet research was conducted using various levels of nitrogenfertilizer during different growth stages of sugar beet plants on research farmof Sugar beet Institute located in Karaj Kamal- Abad during 2007,  design based on Randomized Complete Blocks infour replications. Five level pre-sowing nitrogen from the source of urea wasapplied in amounts of 0(as control), 120, 160, 200 and 240 kg/h. Chlorophyllconcentration leaf blade number 5 was measured by chlorophyll meter (SPAD) at12-15 leaf stage. In the same leaves, concentrations of nitrogen (by Kjeldahl method) wasmeasured. The results showed that moreover 50% of the variability in yield isexplained by the SPAD reading in the growth stages 12-15 leaf in sugar beet. SPADvalue was, also related whit N concentration and α- amino N in root. Thehighest SPAD reading showed maximum α- amino N in root. Nitrogen fertilizer hadsignificant effect on the chlorophyll meter reading. The least number read fromSPAD was 38, which associated with no-applied nitrogen treatment. highest yieldof root (ton / hac) in this experiment was related to with  N160, which the number read from thechlorophyll meter in levele was equal with 41/2. According to the obtainedresults, therefore, whit further research chlorophyll meter (SPAD) can be usedas a simple rapid and non- destructive and may be useful to predict yield andmay be a useful tool determine which field to harvest late in season.                     

References:

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2-  Beckova, L. and Pulkrabek, J. 2005. Evaluation of chlorophyll meter use for optimisation of sugar beet nitrogen fertilizing. University of J. J. Strossmayer u Osijek. Croatian Symposium on Agriculture. e-mail: [e-mail]

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