단보 : 몽골 반건조 지역에서 토양 개량이 백양나무와 비술나무 묘목의 활착 및 생장에 미치는 영향 = Short Communication : Effects of Soil Amendments on Survival Rate and Growth of Populus sibirica and Ulmus pumila Seedlings in a Semi-arid Region, Mongolia

다국어 초록 (Multilingual Abstract)

This study was conducted to investigate effects of soil amendments on survival rate and growth of seedlingsin a semi-arid region, Mongolia. 2-year-old Populus sibirica and Ulmus pumila seedlings were planted in alkaline sandysoils and treated with 2 levels of nitrogen, elemental sulfur, artificial moisture retention and converted loess. After 4months, the seedling survival rate of both species decreased as the amount of nitrogen increased. Nitrogen has beengenerally known to increase seedling survival rate and growth by supplying nutrients, however, reduced survival rate inthis study might be affected by consequential increase in soil osmotic pressure, which was caused by excessive nitrogenfertilization. The root collar diameter (RCD) growth of both species increased significantly by the treatment of convertedloess, and only RCD growth of P. sibirica increased by the artificial moisture retention treatment. Although P. sibiricais drought-tolerant, it is in the group of Populus spp. which requires a high capacity of available water. Conversely, theelemental sulfur treatment showed no effect on survival rate and RCD growth for both species due to the low oxidationof sulfur in arid soils. The extended monitoring of seedling growth and soil characteristics is required to elucidate thelong-term effects of soil amendments in the semi-arid region, and the further studies are also needed to examine theappropriate amount of fertilizers for both species.

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