土壤紧实度对甜茶幼苗光合参数和水分利用率的影响  

Effects of Soil Compaction on Photosynthetic Parameters and Water Use Efficiency of Malus hupehensis Seedling

作　　者：吴亚维[1,2] 马锋旺[1] 邹养军[1] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100 [2]贵州省果树科学研究所,贵州罗甸550100

出　　处：《贵州农业科学》2009年第4期137-138,共2页Guizhou Agricultural Sciences

基　　金：农业部"948"引进项目"优质出口苹果生产和加工技术引进与示范"(2006-G28)

摘　　要：以平邑甜茶(Malus hupehensis.Rehd)幼苗为材料,采用盆栽模拟试验,测定了不同土壤容重(1.25 g/cm3、1.40 g/cm3、1.55 g/cm3)下平邑甜茶幼苗叶片的光合参数和水分利用效率。结果表明,3个处理植株叶片净光合速率、叶片组织含水量和组织相对含水量差异不显著,1.55 g/cm3处理的气孔导度、胞间CO2浓度和叶片蒸腾速率显著低于1.25 g/cm3和1.40 g/cm3的处理,而植株叶片瞬时水分利用效率显著高于1.25 g/cm3和1.40 g/cm3的处理,但是1.25 g/cm3和1.40 g/cm3处理以上5项指标均差异不显著;叶绿素含量表现为1.40 g/cm3>1.25 g/cm3>1.55 g/cm3。A pot culture experiment was conducted to investigate the effects of soil compaction with 1.25 g/cm^3 , 1.40 g/ cm^3 and 1.55 g/cm^3 soil bulk density （SBD） on photosynthetic parameters and water use efficiency of Malus hupehensis leaves. The results showed that there were no significant difference in net photosynthetic rate（Pn）,leaf water content and organization relative water content （RWC） between hree treatments, the stomatal conductance（Gs）, intercellular CO2 concentration （Ci） and leaf transpiration rate （Tr） of the treatment with 1.55 g/cm3 was significantly lower than the treatments with l. 25 g/cm^3 and 1.40 g/cm^3, but its instantaneous water use efficiency was significantly higher than the treatments with 1.25 g/cm^3 and 1.40 g/cm^3 and the chlorophyll content of different treatments was 1.40 g/cm^3〉 1.25 g/cm^3〉1.55 g/cm^3.

关 键 词：土壤紧实度 平邑甜茶 光合参数 水分利用效率 

分 类 号：S151.92[农业科学—土壤学]