摘要
在大田条件下研究了不同UV-B辐射强度及种植密度对大麦生长发育的影响。UV-B辐射强度设4个水平,即对照(自然光)、E1(比对照增强10%)、E2(比对照增强20%)和E3(比对照增强30%);种植密度(播种量)设3个水平,即D1(5.56 g/m2)、D2(11.11 g/m2)和D3(16.67 g/m2)。结果表明,UV-B辐射增强明显抑制大麦生长,使植株变矮,绿叶面积和干物质量下降,且辐射越强,抑制作用越明显,但抑制程度随生育期而异。在自然光下,增大种植密度可使株高增加,绿叶面积和干物质量下降;UV-B辐射增强20%处理下,增大种植密度可减轻UV-B辐射增强对大麦生长的抑制作用。在UV-B辐射增强条件下,适当提高大麦种植密度,可降低UV-B辐射增强对大麦生长的不利影响。
A field experment was conducted to investigate the effects of enhanced UV-B radiation and different planting densities on growth and development of barley. The experiment was designed with four levels of UV-B radiation i. e. control （CK, ambient）, enhanced UV-B （E1 , enhanced 10% ）, enhanced UV-B （E2, 20% enhanced） and enhanced UV-B （ E3, 30% enhanced） and with three levels of planting densities i.e. 5.56 g/m2 （ D1 ）, 11.11 g/m2 （ D2 ） and 16. 67 g/m2 （D3）. The results showed that the decreases in plant height, green leaf area and biomass （root and shoot） decreased under enhanced UV-B radiation, and the stronger the radiation, the more obvious the inhibition. The inhibition varied with growth stages. Under natural light, increasing planting density led to the increase in plant height and the decreases in green leaf area and biomass. Under enhanced UV-B treatment E2, the inhibition could be alleviated by increasing planting density.
出处
《江苏农业学报》
CSCD
北大核心
2013年第2期254-260,共7页
Jiangsu Journal of Agricultural Sciences
基金
国家自然科学基金项目(40871151)
教育部高校博士点基金项目(20103228110003)
江苏省"333工程"项目
关键词
UV-B辐射
种植密度
大麦
生长发育
UV-B radiation
planting density
barley
growth and development
