Analysis of growth, productivity and yield in rainfed field-grown maize plants
2003
Jovanovic, Z. | Prokic, Lj. | Stikic, R. | Savic, D. (Faculty of Agriculture, Belgrade - Zemun (Serbia and Montenegro))
Analysis of growth, productivity and yield in two maize genotypes (DTP - drought tolerant population and line B 73) have been done in rainfed field conditions. The trial was carried out during different stages of development and several parameters of water status (water potenatial and soil water content), crop growth and productivity (relative leaf expansion rate - RLER, relative growth rate - RGR, net assimilation rate - NAR and leaf area ratio - LAR) and components of yield (ear length, row number per ear, grain number per row, ear weight, kernel weight and weight of 1000 kernels) were measured. Obtained results of crop water status pointed out that plants were exposed to mild stress field conditions and also indicated that in this conditions investigated plants may have a chemical signaling regulation mechanism. Growth and productivity analysis of both genotypes showed that leaf area and total biomass were increased during the season and reached maximum values at milky stages. The highest values of RLER, RGR and LAR were observed in the vegetative stage and decreased during the end of season. Drought had smaller effect on inhibition of leaf growth, productivity and yield in drought tolerant population DTP comparing to drought susceptible line B 73.
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