scholarly journals Dynamics of humus forms and soil characteristics along a forest altitudinal gradient in Hyrcanian forest

2021 ◽  
Vol 14 (1) ◽  
pp. 26-33
Author(s):  
M Bayranvand ◽  
M Akbarinia ◽  
G Salehi Jouzani ◽  
J Gharechahi ◽  
G Alberti
Keyword(s):  
Altitudinal Gradient ◽  
Soil Characteristics ◽  
Hyrcanian Forest ◽  
Humus Forms

scholarly journals S-allele frequency and genetic diversity of Malus orientalis Uglitzk along an altitudinal gradient in the Hyrcanian forest

2020 ◽  
Vol 29 (2) ◽  
pp. e015
Author(s):  
Hamed Yousefzadeh ◽  
Rasta Rajaei ◽  
Bjarne Larsen ◽  
Hamid Bina ◽  
Gregor Kozlowski
Keyword(s):  
Genetic Diversity ◽  
Allele Frequency ◽  
Altitudinal Gradient ◽  
Hyrcanian Forest ◽  
Northern Iran ◽  
Term Survival ◽  
Positive Correlation ◽  
S Alleles ◽  
S Allele ◽  
Malus Orientalis

AbstractAim of study: The Caucasian apple (Malus orientalis Uglitzk.) is distributed throughout the Hyrcanian forest. The species keeps a gametophytic self-incompatibility reproduction system based on a single S-allele. In order to ensure a high mating probability and thereby long-term survival of the populations, a high S-allele diversity is needed.Area of study: Three populations of Caucasian apple along an altitudinal gradient in northern Iran were studied.Material and methods: Here, we evaluated the S allele frequency and genetic diversity based on a small set of individuals.Main results: Moderate genetic diversity within population and high genetic differentiation among populations are suggested. In total, 18 S-alleles were identified among the three populations with between 10 and 12 S-alleles at each population site.Research highlight: The diversity of S-alleles showed a significant positive correlation with altitude, which is consistent with the positive correlation of genetic diversity.

LAND USE TYPES AND SOIL CHARACTERISTICTS: A CASE STUDY IN HUONG VINH COMMUNE, HUONG TRA TOWN, THUA THIEN HUE PROVINCE

2017 ◽  
Vol 126 (4B) ◽  
Author(s):  
Trần Thanh Đức
Keyword(s):  
Land Use ◽  
Sweet Potato ◽  
Soil Analysis ◽  
Soil Characteristics ◽  
Low Ph ◽  
Clay Loam ◽  
Total N ◽  
Land Use Types ◽  
Total P

This research carried out in Huong Vinh commune, Huong Tra town, Thua Thien Hue province aimed to identify types of land use and soil characteristics. Results showed that five crops are found in Huong Vinh commune including rice, peanut, sweet potato, cassava and vegetable. There are two major soil orders with four soil suborders classified by FAO in Huong Vinh commune including Fluvisols (Dystric Fluvisols<em>, </em>Gleyic Fluvisols and Cambic Fluvisols) and Arenosols (Haplic Arenosols). The results from soil analysis showed that three soil suborders including Dystric Fluvisols<em>, </em>Gleyic Fluvisols and Cambic Fluvisols belonging to Fluvisols were clay loam in texture, low pH, low in OC, total N, total P<sub>2</sub>O<sub>5</sub> and total K<sub>2</sub>O. Meanwhile, the Haplic Arenosols was loamy sand in texture, poor capacity to hold OC, total N, total P<sub>2</sub>O<sub>5</sub> and total K<sub>2</sub>O

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