Journal of Food, Agriculture and Environment

Effects of plant density and row spacing on biomass production and some of physiological indices of corn (Zea maize L.) in second cropping

Author(s):

Raouf Seyed Sharifi ¹*, Nayer Nabi Zadeh ²

Recieved Date: 2012-06-25, Accepted Date: 2012-10-06

Abstract:

In order to evaluate effects of plant density and row spacing on biomass production and some physiological indices of corn (Zea maize L.) in second cropping, a factorial experiment based on randomized complete block design was conducted in Research Farm, University of Mohaghegh Ardabili in 2007. Factors were plant population at three levels (7, 9 and 11 plants m^-2 ) with row spacing at three levels (45, 60 and 75 cm). The results showed that various levels of plant population and row spacing affected biomass production and growth indices of corn (Zea maize L.). Mean comparisons showed that maximum total biomass was obtained at 11 plants m^-2. Row spacing had different response to total biomass. Maximum total biomass was obtained in row spacing of 45 cm and minimum in row spacing of 75 cm. Investigation of variances trend of dry matter accumulation indicated that in all of treatment compounds, it increased slowly until 28 days after sowing and then increased rapidly till 77-84 days after sowing. From 84 days after sowing till time of harvest, it decreased due to increasing aging of leaves, decreasing of leaf area index, net assimilation rate and crop growth rate. Increase in plant population also significantly increased the crop growth rate and the maximum of it was observed by the plots that was applied 11 plants m^-2 with row spacing of 45 cm. In addition, in all of treatment compounds, CGR increased slowly until 52 days after sowing and then decreased slowly till 53-54 days after sowing. From 54 days after sowing till harvest time, it decreased rapidly due to decreasing of leaf area index and net assimilation rate. Thus, it can be suggested that in order to increasing of total biomass, crop growth rate, leaf area index, net assimilation rate and the other of physiological indices should be applied 11 plants m^-2 with row spacing of 45 cm in conditions of Ardabil Plain  in second cropping. 

Keywords:

Corn, plant population, physiological indices, row spacing

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Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 3&4
Category: Agriculture
Pages: 795-801

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