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بررسی خصوصیات شیمیایی خاک، مقدار لاشهریزی و ورود عناصر غذایی در سه توده دست‌کاشت آزاد، پلت و ون (جنگل آموزشی– پژوهشی دارابکلا- ساری) | ||
| تحقیقات جنگل و صنوبر ایران | ||
| مقاله 11، دوره 20، شماره 4 - شماره پیاپی 50، دی 1391، صفحه 655-645 اصل مقاله (256.13 K) | ||
| نوع مقاله: علمی- پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijfpr.2012.107481 | ||
| نویسندگان | ||
| سیده فاطمه هاشمی* 1؛ سید محمد حجتی2؛ سید محمد حسینی نصر2 | ||
| 1دانش آموخته کارشناسی ارشد، گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| 2استادیار، گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| چکیده | ||
| در این پژوهش عناصر غذایی خاک، مقدار لاشهریزی پائیزه و ورود عناصر غذایی از طریق لاشبرگ به کف جنگل و ارتباط آنها با هم در سه توده (آزاد، افرا پلت و ون) جنگل‌کاری شده در جنگل آموزشی- پژوهشی دارابکلا ساری مورد بررسی قرار گرفت. نمونههای خاک از عمق 15-0 سانتی‌‌متری خاک برداشت و عناصر غذایی آنها مورد اندازهگیری قرار گرفت. برای اندازهگیری لاشهریزی در فصل خزان 3 تله جمعآوری لاشبرگ (به ابعاد 50×50 سانتیمتر) بهطور تصادفی در هر توده قرار داده شد و جمعآوری لاشبرگها بهصورت ماهانه انجام شد. نظر به اینکه برگ درصد قابل توجهی از لاشهریزی را در گونههای مورد بررسی به خود اختصاص داده است، بنابراین نمونههای برگهای خزان شده در ماه‌های مختلف فصل خزان برای اندازهگیری محتوی عناصر غذایی به آزمایشگاه منتقل شد. عناصر غذایی خاک بجز مقدار فسفر و پتاسیم در بین گونهها تفاوت معناداری نشان دادند. کمترین مقدار عناصر غذایی نیتروژن، فسفر، پتاسیم، کلسیم و منیزیم در خاک گونه ون مشاهده شد. نتایج کلی لاشهریزی سه گونه مورد بررسی در سه ماه خزان لاشبرگ نشان داد که افرا بیشترین و ون کمترین مقدار انباشت لاشبرگ را داشتهاند. نتایج نشان داد که تودهها توانستهاند خواص خاک را تا حدودی تغییر دهند. یافتههای پژوهش حاضر مؤید آن است که این تغییرات با تفاوتهای مشاهده شده در مقدار بازگشت عناصر غذایی در هر توده هم‌خوانی دارد. | ||
| کلیدواژه‌ها | ||
| تله جمعآوری لاشبرگ؛ بازگشت عناصر غذایی؛ ازت؛ فسفر؛ پتاسیم؛ کلسیم | ||
| عنوان مقاله [English] | ||
| Soil chemical properties, amount of litterfall and nutrients recycling into Caucasian elm, maple and ash plantation stands at Darabkola Experimental Forest Station | ||
| نویسندگان [English] | ||
| Sayyed Fatemeh Hashemi1؛ Sayyed Mohammad Hojati2؛ Sayyed Mohammad Hosseini Nasr2 | ||
| 1M.Sc. Graduated of forestry, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University | ||
| 2Assistant prof., Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University | ||
| چکیده [English] | ||
| In this experiment, soil nutrients, amount of autumn litterfall and nutrients recycling via litterfall into forest floor and their relationships to each other were studied in three stands (Elm, Maple and Ash) at Darabkola Experimental Forest of Sari Agricultural Sciences and Natural Resources University (North of I.R. Iran). Soil samples were made from 0-15 cm depth of soil surface and their chemical properties (pH, EC and the concentrations of N, P, K, Ca and Mg) were tested. Three litter traps (50×50 cm) were randomly placed in each stand and litter was collected at monthly intervals in autumn. Because leaves usually form a significant percentage of litterfall amount, they were collected from each litter-trap at different months of autumn, dried and sieved and finally analyzed. Results showed that there was significant difference (p<0.05) between the tree species in terms of soil nutrient concentration,except P and K contents). The lowest amount of soil N, P, K, Ca and Mg belonged to Ash plantation. Overall, the greatest and the lowest amount of litterfall belonged to Maple and Ash species, respectively. The results showed that the stands were able to change th soil properties to some extent. It might be concluded that these changes are consistent with the differences observed in respect to the recycled nutrients at each stand. | ||
| کلیدواژه‌ها [English] | ||
| 3 litter trap, recycled nutrient, N, P, K, Ca, Mg | ||
| مراجع | ||
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