盐渍化土壤水肥耦合对向日葵叶水势的影响  

Leaf water Potential of sunflower under water and fertilizer coupling in saline soil

作　　者：田德龙[1] 史海滨[1] 薛铸[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018

出　　处：《中国农村水利水电》2010年第12期35-37,41,共4页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(50769004);"十一五"国家科技支撑计划重点项目(2007BAD88B04)

摘　　要：采用312-D最优饱和设计方案进行田间对比试验。对盐渍化土壤水肥耦合效应下向日葵叶水势的影响因素及变化规律进行了研究。结果表明,盐渍化地区油料向日葵叶水势的主要影响因素除气象因素外。还包括土壤盐分、土壤水分和施肥量。叶水势与大气水势、叶温呈线性关系。土壤基质势越高,叶水势越高;土壤基质势越低叶水势也越低。施肥在一定程度上可以缓解水盐的胁迫,施肥量的增加使叶水势降低。With 312-D optimized saturation design,field experiments are conducted to study influencing factors and temporal and spatial variation of sunflower＇ s leaf water potential.Besides meteorological factors,the result shows that the key influencing factors of sunflower＇ s leaf water potential include soil salt,soil moisture and rate of fertilizer application.The relationship between leaf water potential and atmosphere water potential is linearity,the relationship between leaf water potential and leaf surface temperature is linearity.The leaf water potential and matric potential has a positive relationship.Fertilization can release the compel of water and salt,increase in fertilizer can reduce the leaf water potential.

关 键 词：盐渍化土壤 叶水势 向日葵 施肥 

分 类 号：S156.4[农业科学—土壤学]