Mahboubeh Hadinejad; Reza Erfanzadeh; Hasan Qelichnia
Volume 27, Issue 4 , December 2020, , Pages 742-751
Abstract
The persent study was designed to investigate the effect of canopy cover of three woody species, Amygdalus scoparia, Daphne mezereum, Ebenus stellata on the composition and density of soil seed bank under their canopies. Fifteen individuals were selected from each of the woody species in Chenarnaz rangelands, ...
Read More
The persent study was designed to investigate the effect of canopy cover of three woody species, Amygdalus scoparia, Daphne mezereum, Ebenus stellata on the composition and density of soil seed bank under their canopies. Fifteen individuals were selected from each of the woody species in Chenarnaz rangelands, Yazd provimce, Iran in autumn, 2018. then the soil samples were taken from under the canopies of woody species with a control treatment outside the canopy from a depth of 0-5 cm with an auger, 5 cm in diameter. The density and composition of soil seed banks in samples were measured through germination method in the greenhouse. The results of one-way ANOVA showed significant differences of total seed bank densities under A. scoparia (with average 1133.17 seed per m2), D. mezereum (with average 823.10 seed per m2), E. stellata (with average 793.21 seed per m2). In addition, total soil seed bank density was significantly higher than the outside of canpies (with average 134.48 seed per m2). Hemi-cryptophyte was the most frequent in the soil seed bank. The results of this research showed the positive effect of the canopy of woody species in increasing of density of soil seed bank in which A. scoparia showed a great impact on soil seed bank characteristics.
Moslem yazdani; Reza Erfanzadeh; Asghar Mosleh Arani
Volume 27, Issue 1 , April 2020, , Pages 47-57
Abstract
Plant litter is one of the best factors in the protection and stability of soil and by decomposition of litters, the percentage of organic matter could be increased which also improves the chemical properties of soil and plant production. The aim of this study was to compare the litter quality accumulated ...
Read More
Plant litter is one of the best factors in the protection and stability of soil and by decomposition of litters, the percentage of organic matter could be increased which also improves the chemical properties of soil and plant production. The aim of this study was to compare the litter quality accumulated beneath three shrub species (Amygdalus scoparia, Ebenus stelata, Daphne mezerum) by measuring the soil chemical (carbon, calcium, magnesium, nitrogen, phosphorus, and potassium) and physical (Electrical conductivity and acidity) properties in Marvast rangelands, Yazd province, Iran. At the end of growth season, fifteen sites were selected and soil samples containing litter material was done randomly taken beneath and outside of the shrub canopy covers. Then, the chemical and physical characteristics of litter were measured in the laboratory. In order to compare the litter characteristics, one-way ANOVA were made between species and, between outside and beneath the shrubs. Mean comparisons were made using Duncan method. The results showed that the litter samples under E. stelata and D. mezerum shrubs had the highest values for calcium, magnesium and nitrogen contents. In contrast, the litter samples collected from outside shrubs had the highest values carbon content and electrical conductivity. The phosphorus contents between the species and between under and outside shrub of litters were statistically equal. Generally, the results of this study showed that the woody species in dry regions had different capacity in litter quality and soil improvement. It should be considered in the activity of rangeland improvement and development.