摘要
以陕北黄绵土为材料,采用德国生产的生长箱进行盆栽实验,研究冰草生长发育对土壤团聚体形成和稳定性的影响。实验设计包括5个生长期(15,30,45,60,75d)和各生长阶段的对照实验。研究结果表明,在75d冰草生长发育过程中,冰草根系生长发育对土壤团聚体的形成及其稳定性的影响不明显,而土壤干湿交替对土壤团聚体的影响大于冰草根系生长发育对土壤团聚体的影响。造成冰草根系生长发育对土壤团聚体稳定性影响不明显的主要原因是黄绵土团粒结构较差和冰草生长期较短。
A pot experiment in growth cabinet was designed to investigate the effects of root growth on soil aggregate formation and stability, taking the loess soil from the North Shaanxi Province as the experimental material. The experimental variables included 5 growth periods (15, 30, 45 60, 75 d) and a control of bare in each growth period. The result showed during ryegrass growth process of 75 days, soil aggregate formation and stability were not significantly different, but the effects of the alternation between dry and wet was more significant than the effects of root growth. The reason was less aggregate structure of loess soil and short growth duration of ryegrass.
出处
《水土保持研究》
CSCD
2004年第4期97-100,共4页
Research of Soil and Water Conservation
基金
国家自然科学基金西部重大研究计划项目"近140年子午岭地区植被-侵蚀-土壤互动作用及机理"(90302001)
