Background and Objective: Climate change and global warming occur as a result of increasing greenhouse gases that have detrimental effects on human life on the planet, while forests have a very important impact on carbon storage. The purpose of this study was to measure More
Background and Objective: Climate change and global warming occur as a result of increasing greenhouse gases that have detrimental effects on human life on the planet, while forests have a very important impact on carbon storage. The purpose of this study was to measure and modeling of biomass and carbon storage of root and stump of Populus deltoids trees in plantations of Langaroud county, Guilan province.Material and Methodology: For this purpose, based on selection sampling method, 93 trees were selected from different diameter classes in spring of 2021 and after cutting and removing the sections, an excavator was used to remove the stumps and roots of the trees from the soil. To estimate the amount of biomass and carbon storage of tree roots and stumps, samples of these organs were fallen down and weighed, and after drying in the oven, the dry weight of the samples was measured. After burning an enough amount of dried samples in electric kiln, the weight of organic matter and carbon of the stump and root samples were obtained. Findings: Results showed that mean of stump and root biomass were 7.99 and 65.5, and mean of stump and root carbon sequestration were 3.92 and 32.32 kg/tree, respectively. The results showed that the obtained models for estimating biomass and carbon storage of stumps and roots using three variables of stump diameter, DBH and volume of trees have a high coefficient of determination, but the model obtained using stump height did not provide an acceptable coefficient of determination. The results showed that the amount of carbon storage in the stumps and roots were 1.568 and 12.928 tons/hectare, respectively. Discussion and Conclusion: The results showed that knowledge of biomass and carbon storage of poplar trees is very important in valuation and management programs for the development of wood farming and the use of these organs to provide part of the needs of the wood industry.
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In order to survey on probably variety of temperature in a planted area compare to none planted area selected 50 Ha of planted land of near the Dez dam in shahyon of Dezful . For data comparing selected area 10 Ha as well as buffer zone in out o More
In order to survey on probably variety of temperature in a planted area compare to none planted area selected 50 Ha of planted land of near the Dez dam in shahyon of Dezful . For data comparing selected area 10 Ha as well as buffer zone in out of planted land .Then based on Random-systematic method, 3 thermometer maximum-minimum in the stable line altitude 520 meter up the sea level in planted land & 3 thermometer in none planted land in same line were installed too. Harvested data duration one month after assemblage and analysis showed that emperature difference in two areas was very salient and it was proximate to 3 c.Temperature vibration in plated land lower than none planted land meaningful
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Abstract
In this study trees crown covering and rooting effects on soil characteristic varability were studied. For this purpose, 4species include:pinus nigra, Cupressus arizonica, Fraxinus rotundifolia and Robinia pseudoucacia were selected with 43 years&ndash More
Abstract
In this study trees crown covering and rooting effects on soil characteristic varability were studied. For this purpose, 4species include:pinus nigra, Cupressus arizonica, Fraxinus rotundifolia and Robinia pseudoucacia were selected with 43 years–aged affores tostion in Hasnabad–Sanandaj 22 rectungle sample plot (900m2) were chosen and allometric trees data include:DBH, height and Crown diameter were measured then annual DBH & height incremevt were calcuted. We computed crown covering percentage in plot after 43 years. Then 112 Auger soil samples in 0-20 and 20-40 cm
depth around of selected trees were taken afterward subsequently physical and chemical soil characteristics were determined Roots separated by washing then volume, wet weight and dry weight were determind. Comperation physical and chemical soil properties under canopy and around tree in different variation shown that after 43 years afferece on soil charecteris. Finally pinus nigra introduce as the best afforestation and much compatible species.
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گیاهان به ­دلیل غیر متحرک بودن به ­طور اجتناب­ ناپذیری تحت تاثیر استرس‌های محیطی هستند. امواج صوتی یکی از عوامل محیطی است که بر گیاهان اثر می‌گذارد. این مطالعه به­منظور درک رابطه بین گیاهان و امواج صوتی و پاسخ‌های آن‌ها که تاکنون ناشناخته مانده است طراحی More
گیاهان به ­دلیل غیر متحرک بودن به ­طور اجتناب­ ناپذیری تحت تاثیر استرس‌های محیطی هستند. امواج صوتی یکی از عوامل محیطی است که بر گیاهان اثر می‌گذارد. این مطالعه به­منظور درک رابطه بین گیاهان و امواج صوتی و پاسخ‌های آن‌ها که تاکنون ناشناخته مانده است طراحی گردید. برای این منظور گیاه مریم گلی (Salvia splendens)، یکی از گیاهان رایج در فضای سبز، تحت تاثیر امواج صوتی با فرکانس 1000 هرتز و شدت 90، 100 و 110 دسی بل به مدت یک ماه و هر روز یک ساعت قرار گرفت. گیاهچه‌ها از بذرهای کشت شده در محیط کشت MS بدست آمد و هر 20 روز یک بار واکشت صورت گرفت. زمان آغاز تیمار 15 روز پس از کشت بذور بود. نتایج اندازه‌گیری صفات رشدی و آنتی­اکسیدانی نشان داد که امواج صوتی با افزایش شدت صوت در فرکانس 1000 هرتز موجب افزایش رشد گیاه شدند. بیشترین طول ریشه، طول ساقه، وزن خشک، وزن تر در تیمار 110 دسی بل بدست آمد. امواج صوتی منجر به افزایش محتوی پروتئین و آنزیم­های آنتی­اکسیداتیو کاتالاز، پراکسیداز و آسکوربات پراکسیداز شد. محتوی مالون­دی­آلدهید به­عنوان شاخص تخریب غشای سلولی با افزایش شدت صوت افزایش نشان داد. به­طور کلی، گیاه مریم گلی با افزایش رشد و بهبود صفات فیزیولوژیکی و بیوشیمیایی به تنش امواج صوتی پاسخ داد.
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