Faculty of Biology, University of Latvia
EEB
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Environ Exp Biol (2018) 16: 169–175
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Environmental and
Experimental
Biology

Environ Exp Biol (2018) 16: 169–175

Orginal Paper

Response of sugar beet to irrigation interval, harvesting time and integrated use of farmyard manure and nitrogen fertilizer

Fatemeh Heidarian1, Asad Rokhzadi1*, Fardin Mirahmadi2
1 Department of Agronomy, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
2 Department of Food Science & Technology, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
* Corresponding author, E-mail: asadrokh@yahoo.com

Abstract

Considering the importance of interactive effects of irrigation, fertilizer and harvest date this experiment was aimed to study the growth and yield response of spring-sown sugar beet to the harvest date and the application of nitrogen and farmyard manure under two irrigation regimes: well watered and moderate drought stress. Results indicated that irrigation significantly affected taproot growth; moderate drought stress led to an increase in root diameter. Leaf dry weight was increased by the application of nitrogen fertilizer in the well watered condition but decreased under water deficit condition. The combined application of 50% nitrogen fertilizer and 50% farmyard manure resulted in increased root yield by 28 and 32% compared with single application of nitrogen and farmyard manure fertilizers, respectively. Interaction effect of factors showed that under the moderate drought stress and availability of the recommended dose of nitrogen in soil, a late harvest date can be recommended to prevent loss of sugar content in sugar beet roots.

Key words: harvest, drought stress, sugar beet, water regime.

 
Environ Exp Biol (2018) 16: 169–175
 DOI: http://doi.org/10.22364/eeb.16.16
EEB

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Prof. Gederts Ievinsh
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University of Latvia

 
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