نتایج جستجو برای: plant parameters including canopy cover area
تعداد نتایج: 2368419 فیلتر نتایج به سال:
Vegetation cover is the first barrier for the raindrops resulting to the interception and infiltration loss. Interception as one of the main components of ecohydrology equation plays a major role in the water balance of rangelands. However, few studies have been done on the interception of rangeland plants in Iran. This study was carried out to find the interception rate in Astragalus parrowian...
The study of vegetation dynamics under grazed and non-grazed rangelands is one of the most important prerequisites for range improvement. In this research, vegetation composition and the vegetation functional groups were compared in an exclosure site (livestock excluded for six years) and grazed area in semi-steppe rangelands in Tehran province. Systematic random sampling technique through the...
Understory plant communities play critical ecological roles in forest ecosystems. Both above- and below-ground ecosystem properties and processes influence these communities but relatively little is known about such effects at fine (i.e., one to several meters within-stand) scales, particularly for forests in which the canopy is dominated by a single species. An improved understanding of these ...
The protection and improvement of natural resources especially for desert vegetation need a comprehensive recognition of natural resources and relationship on Soil characteristics. One of the most important species growing in sabzevar desert is Stipagrostis pennata and in the current research the relationship between the physicochemical properties of the soils and growth characteristics of the ...
Plant growth and biomass assessments are required in production and research. Such assessments are followed by major decisions (e.g., harvest timing) that channel resources and influence outcomes. In research, resources required to assess crop status affect other aspects of experimentation and, therefore, discovery. Destructive harvests are important because they influence treatment selection, ...
relationships between soil factors and vegetation types in playa of damghan was investigated. six vegetationtypes including artemisia.sieberi, arundo. sp, artemisia.sieberi-peganum.harmala, alhagi.cammelerom,artemisia.sieberi-petropyron.sp, tamarix.passerinoides-halocnemum strobilaceum. one bare land was recognized inthe study area and the research was conducted within mentioned types. canopy p...
This research aims to evaluate the effects of seed scarification on five perennialAstragalus species including A. effusus, A. vegetus, A. subsecundus, A. brevidens and A.cyclophyllon in the field conditions. Seeds were sown after scarification with sandpaper byhand in the field of Homand Absard Rangeland Research Station, Damavand, Iran in autumnin 2008. The seeds were sown using split plot des...
A significant portion of the Shirkouh lands in the Mehriz city encompass irrigated and rainfed orchards. The livelihoods of the people in this area are mainly supported through farming and raising livestock. Many orchard products, especially Amygdalus sp. are rainfed and produce a good crop in rainy years. However, in the drought years, the production faces problems. This research was carried o...
relationships between soil factors and vegetation types in playa of damghan was investigated. six vegetationtypes including artemisia.sieberi, arundo. sp, artemisia.sieberi-peganum.harmala, alhagi.cammelerom,artemisia.sieberi-petropyron.sp, tamarix.passerinoides-halocnemum strobilaceum. one bare land was recognized inthe study area and the research was conducted within mentioned types. canopy p...
vegetation cover is the first barrier for the raindrops resulting to the interception and infiltration loss. interception as one of the main components of ecohydrology equation plays a major role in the water balance of rangelands. however, few studies have been done on the interception of rangeland plants in iran. this study was carried out to find the interception rate in astragalus parrowian...
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