<div>Background: Barley (Hordeum vulgare L.) is one of the more important cultivated crops in the Mediterranean region, where drought and high temperatures during the grain filling stage are the main abiotic stresses limiting its production. The aim of this study is to evaluate the effects of the spike type on the grain yield, thousand kernels weight and some grain filling parameters. 
 
Methods: The present study was conducted on the experimental site of station ITGC in Setif, Algeria, eight Barley genotypes were tested during two cropping seasons (2017/2018 and 2018/2019) in a randomized block design with 3 replications. 
 
Result: The results proved significant effect of genotypes and spike types on the grain filling parameters, but no significant effect of spike type on the thousand kernels weight during the both cropping seasons. In addition, the spike type registered significant effect just during the second cropping season. Among the genotypes with 6 rows spike type the local genotype Fouarra have high grain yield (97.79 Q/ha) with a deviation of 37.57% from the total mean of the genotypes with 6 row spike type. Many studies proved that in 6-row barleys, the magnitude of contribution of grain number in grain yield was higher than contribution of grain weight. The grain growth of genotypes studied follows a sigmoid curve, during the first season (2017-2018) the duration of grain filling ranged between 24 days for Saida 183 and 28 days for Rihane 03, for the group of genotypes with 6 rows. In addition, the duration of grain filling for the 2 row genotypes varied from 24 days for G4 to 28 days for genotype G2. During the second season (2018-2019) and for the genotypes with 6 rows, the duration of the grain filling varied from 21 days for the Saida 183 and 26 days for the genotype Fouarra, for the genotypes with 2 rows the duration of grain filling ranged from 21 days for the genotype G2 to 26 days for the genotype G3. The correlation analysis between the grain filling parameters, GY and TKW demonstrate a significant and positive correlation between TKW and MGW and GFR (r = 0.82* and r = 0.84*, respectively). Overall, the genotype variation in grain filling velocity and duration was responsible for the difference in grain yield and the improvement in grain yield was achieved by the increasing in velocity or duration of grain filling. &nbsp;</div>

The Effect of Spike Row Type on the Grain Yield and Grain Filling Parameters in Barley (Hordeum vulgare L.) Genotypes under Semi-arid Conditions

<div>Background: The aim of this study is to ascertain the response of dual exploitation of intercrops systems their ability to produce forage and grain. Thus the efficiency of the cereal-legume intercropping on the qualitative and quantitative improvement yield of cereals. 
 
Methods: The experiment was conducted at the Setif University Experimental Farm during the years of 2019-20. The experiment was laid out in completely randomize block (CRB) design with three replications. Three cereals namely triticale, oats and barley in association with forage pea and other mixtures with (Vesce commune) were studied. The measure focused on accumulation of dry matter accumulation (DMA), plant height, flag leaf length (FLL), grain yield (GY) and thousand kernels weight (TKW).&nbsp;&nbsp; 
 
Result: The results indicate that capacity of intercropping system systems to produce more dry matter than their mono cropping systems, as well as the intercropping systems significantly improved the qualitative and quantitative yield of cereals in all the tested intercropping systems. A positive significant correlation between SH and FLL r = 0.78 in the peas/oats intercrop. Thus use like this positive significant correlation between DMP GY r = 0.94, while the tritical / pea and barley / pea intercropping are characterized by the best DMP, GY and TKW among different tested cropping systems.</div>

The Effect of Spike Row Type on the Grain Yield and Grain Filling Parameters in Barley (Hordeum vulgare L.) Genotypes under Semi-arid Conditions

The Effect of Cereal-legume Intercropping Systems on the Cereal Grain Yield under Semi-arid Conditions