Intercropping
Crops and medicinal plants ecology
Ecological services of intercropping and agricultural systems
Energy use efficiency
Integrated management of nutrients and natural resources
Integrated crop management
Improving water use efficiency
Ecological weed management
Genetic structure and diversity of Iranian Cannabis populations based on phytochemical, agro-morphological and molecular markers Rezvan Shams, Ali Azizi, Javad Hamzei, Alireza Noroozisharaf, Shoeib Moghadam, et al. Industrial Crops and Products, 2020 Hemp (Cannabis sativa) is an herbaceous, annual, and dioecious plant belongs to the Cannabaceae family and grows in some parts of Iran. In the present study, the genetic diversity between and within the populations of 10 local cultivated landraces from Iran was evaluated, using multiple datasets (agro-morphological and biochemical traits, seed oil fatty acid compositions, and ISSR (Inter simple sequence repeats) markers. The analysis of variance based on the morpho-biochemical traits and oil compositions indicated significant differences among studied hemp populations (P
Nitrogen rate applied affects dry matter translocation and performance attributes of wheat under deficit irrigation Javad Hamzei Journal of Plant Nutrition, 2018 Crop production in arid/semi-arid regions is restricted by soil moisture and nitrogen (N) deficiencies. Consequently, sufficient levels of N and irrigation are important in improving the crop's productivity. Therefore, a 2-year field experiment was conducted to understand influences of watering techniques namely 300, 500 and 700 mm with contrasting N supply (0, 60, 120 and 180 kg ha−1) on wheat cv. “landrace” productivity, dry matter translocation (DMT) and contribution of pre-anthesis assimilates to the grain (CPAAG, %). Experiments were conducted each year using a split-plot design with three replications at a private farm, North Hamedan Province, Iran. Accordingly, when 500/700 mm water was applied, CPAAG values were higher than those obtained after applying 300 mm water, i.e. 49.99 and 45.45 vs. 40.13%. The highest productivity in terms of grain yield, grain N concentration, nitrogen harvest index, special products analysis division and protein content was achieved in normal deficiencies of irrigation and N. This was further supported by a higher leaf area index, crop growth rate and N uptake of such treatment. Meanwhile, co-application of 120 kg N and 500 mm water significantly improved DMT, water and N use efficiency, and it was the optimal scheme for wheat production.
Diversity and bioactivity of bacterial endophyte community of Cupressaceae J. Soltani, M. Zaheri-Shoja, J. Hamzei, M. S. Hosseyni-Moghaddam, S. Pakvaz Forest Pathology, 2016 Summary The plant family Cupressaceae (Coniferales) harbours diverse endophytic fungi with antifungal, antibacterial and antiproliferative activities. Here, endophytic association of a broad bacterial community with the healthy foliar tissues of Cupressus arizonica, Cupressus sempervirens, Juniperus communis and Thuja orientalis (Cupressaceae) is shown. We isolated over 69 endophytic bacterial strains of Proteobacteria, Bacilli and Actinobacteria from Cupressaceae. The initial screening for antifungal activity against Pyricularia oryzae identified eleven superior bacterial strains which were identified as Brevundimonas diminuta CAE24 (G−, Caulobacteraceae, Alphaproteobacteria); Stenotrophomonas maltophilia CAE23, CSE4, CSE12, CSE42, CSE49 and CSE62 (G−, Xanthomonadaceae, Gammaproteobacteria); Bacillus pumilus CSE66 and Bacillus subtilis POE26 (G+, Bacillaceae, Bacilli); and Microbacterium resistens CSE19 (G+, Microbacteriaceae, Actinobacteria). The dominant isolated bacterial species was S. maltophilia. This species represented 63.6% of the superior strains which was ubiquitous and also non-host specific. In addition, the superior bacterial strains produced bioactive secondary metabolites and volatile compounds (VOCs) with antifungal activity against the fungal pathogens of Cupressaceae, that is Diplodia seriata, Phaeobotryon cupressi and Spencermartinsia viticola. The antagonistic activity of the endophytic bacteria on the target fungi was also confirmed in vitro. To our knowledge, this is the first to document such an endophytic bacterial community in Cupressaceae and its bioactivity. These findings may find application in organic agroforestry for plant disease biocontrol and in biopharmacy for lead molecule discovery.
Energy use and input-output costs for sunflower production in sole and intercropping with soybean under different tillage systems Javad Hamzei, Mohsen Seyyedi Soil and Tillage Research, 2016 Agriculture is an important energy user and energy supplier in the form of bio-energy. In today’s agricultural practices, soil tillage and applications of chemicals are the greatest consumers of energy and labor. Therefore, selection of an appropriate tillage method and finding an efficient way for decreased consumption of chemicals can improve energy use and reduce costs. The pre-requisite for such improvements includes assessment of the system's energy balance. Moreover, intercropping can play an important role in improving yield and reducing energy consumption. To compare the effects of different tillage treatments on energy use and grain yield in a sunflower-soybean intercropping system, a field experiment was performed on a clay loam soil at the Agricultural Research Station, Faculty of Agriculture, University of Bu-Ali Sina, Hamedan, Iran, during the growing seasons of 2013 and 2014. Three levels of tillage, as the main factor, and different planting patterns were tested in sub-plots (sole crop of sunflower, sole crop of soybean, and additive intercroppings of sunflower + 30%, 60% and 90% soybean). The intercropping design was additive. Results showed that sunflower grain yield was significantly affected by the planting pattern. Tillage treatments did not have significant effects on the sunflower yield. The highest sunflower grain yield (356.22 g m −2 ) was obtained from the sole crop of sunflower. Furthermore, amongst intercropping treatments, the highest sunflower grain yield (302.44 g m −2 ) was achieved from the combination of sunflower + 60% soybean. Also, comparison of the combined treatments indicated that the highest energy output (248363 MJ ha −1 ) and energy use efficiency (7.44) were reached with the combinations of conventional tillage × sunflower + 90% soybean, and minimum tillage by disc × sunflower + 90% soybean, respectively. In conclusion, using minimum tillage and intercropping system of sunflower + 60% soybean can decrease energy consumption and increase total yield and land use efficiency when compared to sunflower sole crop under conventional tillage.
Mycorrhizal symbiosis increases reproduction and seed quality of summer squash in field conditions Journal of Applied Horticulture, 2016
Effect of integrated application of phosphorus and phosphate solubilizing microorganisms on root colonization, productivity and seed quality of Cucurbita pepo L. Journal of Applied Horticulture, 2014
Javad Hamzei, Mohsen Seyyedi. 2016. Energy use and input–output costs for sunflower production in sole and intercropping with soybean under different tillage systems. Soil & Tillage Research 157 (2016) 73–82. .
