摘要
[目的]探讨不同干旱胁迫和土壤埋藏深度对马桑种子出苗率的影响.[方法]研究不同强度干旱(5％、10％、15％、20％、25％、30％)胁迫及不同土壤埋藏深度(0、1、2、3、5、7 cm)下马桑种子萌发指标的变化.[结果]马桑种子萌发率随着干旱胁迫的增加呈下降趋势,干旱胁迫抑制了种子萌发率和萌发速率;马桑在土壤表层出苗率最高,在≥2 cm的土壤埋藏深度下无幼苗出土.[结论]试验结果为研究马桑种子萌发行为对石漠化恶劣生境的适应机制提供了理论依据.
Abstract
[Objective] To research the drought stress and soil burial depth on seed germination of Coriaria nepalensis Wall.[Method] Changes of seed germination index C nepalensis were researched under different drought stresses (5％, 10％, 15％, 20％, 25％, 30％) and soil burial depths (0, 1, 2, 3, 5, 7 cm).[Result] Seed germination rate of C.nepalensis decreased as the drought stress enhanced.Drought stress restricted the seed germination rate and germination speed.Germination rate of C.nepalensis was the highest at surface soil;and no seedlings were germinated when soil burial depth was greater than 2 cm.[Conclusion] This research provides theoretical foundation for adaptive mechanism of C.nepalensis seed germination to stony desertification.
国家科技期刊平台
NSTL
维普
万方数据