Effects soil penetration resistance on Acer velutinum Boiss. seedlings; responses of biomass and architecture
محل انتشار: ششمین کنفرانس ملی مهندسی و مدیریت محیط زیست
سال انتشار: 1403
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 105
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شناسه ملی سند علمی:
EEMCONF06_023
تاریخ نمایه سازی: 31 مرداد 1403
چکیده مقاله:
Severe soil compaction typically decreases absorption by roots of major mineral nutrients, especially N, P and K. Experiments on tree seedling growth conducted in the field and on cores of severely compacted forest soils clearly show that soil compaction adversely affects stand regeneration by inhibiting seed germination and seedling growth and by inducing seedling mortality. In general, at the whole plant level, it is assumed that soil compaction negatively affects investment in root growth, due to the resistance of the substrate to penetration. This study used a soil strength experiment in a greenhouse to test the hypotheses that increasing soil strength would adversely affect seedling morphology and alter seedling architecture by changing biomass allocation patterns. All of the biomass variables of A. velutinum decreased significantly with increasing SPR as negative quadratic shape with the exception of lateral root biomass that decreased slowly to the moderate compaction treatment, then with increasing compaction to very high treatment, significantly increased as quadratic curves. Strong adverse effects already followed the moderate to very high intensity compaction treatment and critical soil strength threshold was observed in ۱.۱ MPa soil strength.
کلیدواژه ها:
نویسندگان
Meghdad Jourgholami
Prof., Department of Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj, Alborz, Iran
Tohid Ghassemi
Ph.D. student of Forest Engineering, Department of Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj, Alborz, Iran