کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6543862 | 159212 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of soil compaction on the growth and mortality of planted dipterocarp seedlings in a logged-over tropical rainforest in Sarawak, Malaysia
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Soil compaction is major determinant of plant growth and/or mortality. Tropical rainforests in Southeast Asia have been degraded by commercial logging, and the use of heavy equipment in these operations has increased soil compaction. We conducted enrichment planting 20 years after logging in a tropical forest in Borneo to evaluate the effects of soil compaction on the growth and mortality of planted dipterocarp seedlings over seven years. We planted the seedlings in sites that had been impacted to varying degrees, including a skid trail and undisturbed areas. We measured soil nutrients, moisture content, bulk density, penetration resistance, and light conditions. Seedling mortality, height, and shoot diameter were also determined 0, 12, 24, and 81 months after planting. Elongation rates of tap and lateral roots were measured 24 months after planting. We also excavated seedlings 81 months after planting, and compared heights, shoot diameters, tap root length, and lateral root length between compacted and undisturbed soils. Bulk density varied in the range of 0.98-1.61 g cmâ3 and correlated with soil penetration resistance. Surface soil (0-20 cm depth) in the compacted area had two to three times more resistance to penetration than did undisturbed soils. Surface soil penetration resistance significantly increased seedling mortality during the early planting period (0-12 months), but mortality in the later periods (12-24 and 24-81 months) did not relate to the soil penetration resistance. The lateral root growth rate in the early planting period (0-24 months) was also significantly inhibited by penetration resistance, but tap root growth was not. Penetration resistance did not reduce the seedling growth rate in the periods 0-12 and 12-24 months after planting, and higher soil moisture promoted seedling shoot diameter growth in the same time periods. Lateral root elongation did not differ between compacted and undisturbed forest soils 81 months after planting, but tap root elongation was inhibited in the compacted area at that time. Our results suggest that soil compaction negatively affect root elongation and initial seedling survival of planted dipterocarp trees even in 20 years after logging operation in Bornean tropical rainforest.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Forest Ecology and Management - Volume 310, 15 December 2013, Pages 770-776
Journal: Forest Ecology and Management - Volume 310, 15 December 2013, Pages 770-776
نویسندگان
Daisuke Hattori, Tanaka Kenzo, Kazuo Okamura Irino, Joseph Jawa Kendawang, Ikuo Ninomiya, Katsutoshi Sakurai,