Salt Tolerance of <i>Xylocarpus mekongensis</i>Pierre: Survival and Growth of Seedlings, Nutrients and Carbon Distribution in Seedling Parts

• 作者: Chameli Saha Mahmood Hossain Md. Sajib Hossain Mohammad Raqibul Hasan Siddique S. M. Rubaiot Abdullah Sanjoy Saha
• 来源期刊: 林学期刊(英文)
• 学科: 工学
• 关键词: GROWTH MANGROVES NUTRIENTS Salinity SURVIVAL Xylocarpus mekongensis
• 年，卷（期）: 2020,（3）
• 页码范围: 293-306
• 页数: 14页
• 分类号: TG1

摘要

<em>Xylocarpus mekongensis</em> Pierre is the important tree species of the Sundarbans. The present study was conducted to evaluate the effect of salinity on the survival and growth of <em>X. mekongensis</em> seedlings. The distributional patterns of nitrogen, phosphorus, potassium, sodium, and carbon in seedling parts were also examined in relation to salinity. Comparatively higher survival (95%) of seedlings was observed at non-saline to slightly saline conditions (0-5 PSU) and it was decreased to 78% at 35 PSU salinity. The relative growth rate (RGR) was higher at non-saline to slightly saline (0 to 5 PSU) conditions compared to higher salinity. Nutrients, sodium, and carbon concentration are found to vary significantly (p < 0.05) among the parts of seedlings. Comparatively (p < 0.05) highest concentration of nitrogen (20 to 34 mg/g), phosphorus (0.50 to 0.75 mg/g), potassium (9 to 27 mg/g) and sodium (7 to 36 mg/g) were found in leaves, while the highest concentration of carbon (42% to 45%) was detected in the stem. However, nitrogen, potassium, and carbon concentration in different parts of seedlings showed significant (p < 0.05) negative correlations with salinity levels. It can be concluded that <em>X. mekongensis</em> has the capacity to tolerate higher saline condition but they grow well in non-saline to less saline conditions.