摘要
根据2003-2006年实测的旱生芦苇地的土壤水分资料和芦苇根系资料，对旱生芦苇的土壤水分时空变化特征及产生变化的原因进行了分析。结果表明，1）旱生芦苇根系深度达250cm以上，毛细根分布最多区域在0～30cm土层，30～210cm土层芦苇毛细根重密度呈现波动起伏，210cm深度以下逐渐减小。2）2003—2006年芦苇地土壤水分年际间变化较为复杂，不同的生长阶段年际变化特征不同。3）每年的芦苇生长期（4—10月）内，土壤水分呈现“降-升-稳定-降-稳定”的变化规律。4）芦苇地土壤水分垂直变化特点是，0-200cm土壤水分变化较为活跃，200cm深度以下土壤水分变化较为稳定。
Based on soil water content and root measurements of Phragmites in 2003-2006, this paper analyzed the characteristics of soil water content changes in time and space and discussed the reasons for these changes. The results showed that. 1） The Phragrnites root can reach a depth of more than 250 cm, the area of the largest weight density of Phragrnites root is the upper （〈30 cm） soil surface, and the weight density has a fluctuation down to 210 cm, and deeper than 210 cm the weight density is gradually reduced. 2） The year-to-year change of Phragrnites soil water was very complex, and there were different changing characteristics at different growth stages. 3） In the Phragmites growth period （ Apr. -Oct. ） each year, soil water content had a regu lar ＂fall-stable-fall-stable＂ pattern. 4） Soil water content ble at depths lower than 200 cm. actively changed in the 0-200 cm depth but was sta
出处
《草业学报》
CSCD
2008年第2期97-101,共5页
Acta Prataculturae Sinica
基金
国家自然科学基金(40771043)
中国科学院知识创新工程重要方向项目(KZCX2-XB2-03-02,KZCX3-SW-342)
新疆维吾尔自治区科技攻关重大专项(20731137-3)资助
关键词
旱生芦苇
毛细根分布
土壤水分
干旱区绿洲
Phragmites
hair root distribution
soil water content
arid area oasis
