Tag: density

Investigation on density, cover and production changes and the effect of soil texture on these factors in sagebrush steppe rangelands of Esfahan province – JBES

Masoud Borhani, Hossein Arzani, Zahra Jaberalansar, Ehsan Zandi Esfahan, Hanieh Eghdami

Research Center for Agriculture and Natural Resources, Isfahan, Iran

Faculty of Natural Resources, University of Tehran, Karaj, Iran

Research Center for Agriculture and Natural Resources, Isfahan, Iran

Research Institute of Forests and Rangelands, Tehran, Iran

Faculty of Natural Resources, Isfahan University of Technology, Isfahan, Iran

Key words: density, cover, production, soil texture, Isfahan.

Abstract

In order to study the vegetation changes of Esfahan sagebrush rangelands and the role of environmental factors on these changes, four sites located in the steppe region were selected. Alavijeh and Charmshahr had a light soil texture, while the soil texture of Dorr and Baghsorkh was heavy. The quantities of density, canopy cover and plant production on these sites were measured over eight years. Continue reading Investigation on density, cover and production changes and the effect of soil texture on these factors in sagebrush steppe rangelands of Esfahan province – JBES

Evaluation of variety and plant density on grain yield, number of seed per cob and 100 grain weight in maize (Zea mays L.) – JBES

Farhad Hassanpour, Hamid Reza Mobasser, Hamid Reza Ganjali

Department of Agronomy, Islamic Azad University, Zahedan Branch, Zahedan, Iran

Key words: Maize, density, variety.

Abstract

Maize is ranked third among cereal crops after wheat and rice. Maize is used as staple food. Maize is also used as feed for livestock. Planting density plays an important role in achieving high productivity per unit area. Plant density is invariably linked with yield, Continue reading Evaluation of variety and plant density on grain yield, number of seed per cob and 100 grain weight in maize (Zea mays L.) – JBES

The effect of plant density on quantitative characteristics, optical extinction coefficient, and some physiological traits of faba bean cultivars – JBES

Nazli. Derogar, Mani. Mojaddam

Department of Agronomy,college of Agriculture, Ahwaz branch, Islamic Azad University, Ahwaz, Iran

Key words: Faba bean, grain yield, optical extinction coefficient, density, harvest index, varieties.

Abstract

In order to investigate the effect of density on Quantitative Characteristics, Optical Extinction Coefficient, and Some Physiological Traits of Faba Bean Cultivars, field experiment was carried out in the city of Ahwaz field healthy martyr in a factorial randomized complete block design with four replications in crop year of 2011-2012. These factors include density at three levels (8, 12, 16 plants per square meter) and Continue reading The effect of plant density on quantitative characteristics, optical extinction coefficient, and some physiological traits of faba bean cultivars – JBES

Influence of foliar fertilizing on stomata parameters in maize leaf (Zea mays L.)

Hristina Poposka, Silvana Manasievska Simikj, Marina Stojanova, Dusko Mukaetov

Institute of Agriculture, University ,,Ss. Cyril and Methodius’’ Bul.16 Makedonska Brigade 3a, 1000 Skopje, Republic of Macedonia

Faculty of Agricultural Sciences and Food, University ,,Ss. Cyril and Methodius’’ Skopje, Republic of Macedonia Bul.16 Makedonska Brigade 3a, 1000 Skopje, Republic of Macedonia

Key words: Fertilizer, maize, density, adaxial, abaxial.

Abstract

cornIn this research, the effects of foliar fertilizer Megegreen on stomata parameters of maize leaf (ZP 677) were studied. The experiment was performed on the experimental fields of the Institute of Agriculture, in Skopje, R. of Macedonia, during the 2008 and 2009. The foliar fertilizer was applied four times during the growing period in different concentrations of 0.3, 0.6 and 0.9% solution. Stomata density and size were measured on the adaxial and abaxial leaf surface from randomly selected plants from each replication in stage of silking. Stomata counts were made on the impressions from microscopic fields using the colodium method. Analyses of variance indicated that the application of foliar fertilizer has significant influence on stomata features on corn leaves. Results from research, show higher stomata density on adaxial (176,19-182,32 stomata/mm2) and abaxial surface (289,12-293,12 stomata/mm2) at variants 3 and 4. Variant 3 has the highest stomata length on adaxial surface (59,75 μm), without significant difference and the highest average length on the abaxial surface (63,00 μm), which is significantly different from the control variant. With the highest average width on adaxial leaf surface was variant 4 with 11,56 μm and on the abaxial surface was variant 2, with 13,49 μm. A positive significant correlation was observed between stomata number on the adaxial and abaxial surface of leaf (R2= 0,856**).

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