laleh Abaslu; SEYED ABDOLREZA KAZEMEINI; Mohsen Edalat; Ali Dadkhahi
Abstract
In order to evaluate the effects of drought stress and planting method on some physiological and biochemical characteristics of two chickpea cultivars (Cicer arietinum L.) an experiment was conducted at the research station of College of Agriculture, Shiraz University using a split factorial based on ...
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In order to evaluate the effects of drought stress and planting method on some physiological and biochemical characteristics of two chickpea cultivars (Cicer arietinum L.) an experiment was conducted at the research station of College of Agriculture, Shiraz University using a split factorial based on randomized complete block design in four replications. The main factor was stopping irrigation at different growth stages of chickpea (full irrigation=I1, flowering=I2 and two weeks after emergence =I3) and the sub-factor included a combination of pea varieties (Arman and Azad) and sowing methods (planting on ridges, furrow and basin), respectively. Results showed that under drought stress, leaf area index, stomatal conductance, photosynthetic rate, chlorophyll a and b and total chlorophyll content decreased while proline content increased. The cultivar Azad had higher than to Arman, leaf area index, stomatal conductance, photosynthesis rate and chlorophyll. The highest photosynthesis rate obtained under full irrigation treatment (16.09µmol m-2s-1) and it’s reduced to 25.79 and 14.23 percent under water stress in I3 and I2 treatments respectively. Based on these results, it can be concluded that the cultivar of Azad is suitable for this region and it is suggested to be planted on the ridge as has higher photosynthesis rate and lower stomatal conductance reduction leading to a higher yield.
Tayebeh Zareei; SEYED ABDOLREZA KAZEMEINI; Hossein Ghadiri
Abstract
A field experiment was conducted to evaluate the effect of varying doses of haloxifhope-R-methyl ester herbicide on grass weeds grown at various stages in 2011-2012 growing season in Research Farm of College of Agriculture, Shiraz University. The study was carried out as split split plot based on randomized ...
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A field experiment was conducted to evaluate the effect of varying doses of haloxifhope-R-methyl ester herbicide on grass weeds grown at various stages in 2011-2012 growing season in Research Farm of College of Agriculture, Shiraz University. The study was carried out as split split plot based on randomized complete block design with three replicates. Treatments were haloxifhope-R-methyl ester herbicide doses (0.6, 0.8 and 1.0 L/ ha) as main factor, surfactant (with and without) as sub factor and time of herbicide application (2 leaf, 6 leaf and tillering of grass weeds) as sub sub factor. A check treatment (weedy) was also included. A rise of herbicide dose, decreased wild oat and foxtail dry weight 35.7 and 12.6 gr/m2, respectively. The results showed that the delay in herbicide application and reduction of herbicide dose decreased grain yield and its components. The highest reduction in grain yield was obtained with 0.6 L/ ha haloxifhope-R-methyl ester herbicide at tillering stage. Application of surfactant caused a decrease in weed dry weight compared to no surfactant and also increased grain yield significantly. In general, to achieve maximum grain yield and the best grass weed control, application of 1 L/ ha haloxifhope-R-methyl ester with surfactant use at 2-leaf in safflower field is recommended.