林业科学2012，Vol.48Issue(8)：1-5,5.
秋季巴丹吉林沙漠东南缘人工梭梭林水分来源
Water Source of Haloxylon ammodendron Plantations in Autumn at the Southeast Edge of Badain Jaran Desert
摘要
Abstract
Main water source of Haloxylon ammodendron was examined in six different ages (2, 5, 10, 20 , and 30 years) of plantations in desert and the ecotone between oasis and desert at southeast edge of Badain Jaran Desert by the stable oxygen isotope technique in autumn (September) 2009. Meanwhile, soil water content was also measured in six different depths (20 cm. 30 cm, 50 cm, 100 cm, 150 cm and 200 cm). The results showed that soil water content in 20 -30 cm was significantly higher than 150 -200 cm in the all plantations. Soil water in shallow depths was supplied by natural rainfall in late summer and early autumn. With plantation age increased form 2-year-old to 20-year-old, H. ammodendron used more ratio of groundwater and less ratio of shallow layer soil water. Two-year-old H. ammodendron in turn mainly used 100 cm, 20 cm, 30 cm, 50 cm and 200 cm sail water; 5-year-old H. ammodendron in turn mainly used groundwater, 200 cm, 150 cm, 100 cm and 30 cm soil water; 10-year-old H. ammodendron in turn mainly used groundwater, 200 cm, 150 cm, 30 cm and 20 cm soil water; 20-year-old H. ammodendron in turn mainly used groundwater, 200 cm and 150 cm soil water; however, 30-year-old H. ammodendron in turn mainly used 50 cm, 100 cm, 150 cm, 200 cm, 30 cm and 20 cm soil water. At the southeast edge of Badain Jaran Desert, with the increase of plantation age, H. ammodendron had a declined capacity to make use of shallow soil water which is replenished by rainfall, whereas the utilization on deep soil water and ground water was not enough to meet its -water requirement of growth. It might be a reason for the large area degradation of H. ammodendron plantations in the region.关键词
稳定氧同位素/土壤含水量/人工梭梭林Key words
stable oxygen isotope/ soil water content/ Haloxolon ammodendron plantation分类
农业科技引用本文复制引用
朱雅娟,贾志清..秋季巴丹吉林沙漠东南缘人工梭梭林水分来源[J].林业科学,2012,48(8):1-5,5.基金项目
国家“十二五”科技支撑项目专题(2012BAD16B0102) （2012BAD16B0102）
中国林业科学研究院林业研究所重点项目(ZD200908). （ZD200908）
