摘要
以新甜 7号和新甜 9号为材料 ,研究了不同密度条件下甜菜群体光合速率的生育期变化、日变化、群体干物质累积及叶根比率的变化 ,分析了群体光合速率与甜菜地上部、地下部干物质及块根产量的关系。结果表明 ,在块根增长期和糖分积累期 ,群体光合速率与块根产量呈显著正相关 (r =0 .92 6 ) ,说明块根增长期以后的群体光合同化量决定着块根产量的高低 ,维持生育后期群体光合速率 。
The growing periodic variation of canopy apparent photosynthesis(CAP)and diurnal variation of CAP,accumulation of dry matter and the ratio variation of leaf/root ratio were studied under different population densties of sugarbeet Xintian 7,Xintian 9 in Xinjiang,and the relationship between CAP rate and the weight of dry matter above ground,under ground,and beet yield.The results showed that CAP rate has significant positive association with beet yield at beet enlarging stage and accumulating stage.It indicated that canopy photosynthesis assimilation amount after beet enlarging stage decided the beet yield.Sustaining the CAP rate of the late growing stage is favourable for raising beet yield.\;
出处
《石河子大学学报（自然科学版）》
CAS
2000年第1期17-21,共5页
Journal of Shihezi University(Natural Science)
关键词
甜菜
光合速率
干物质累积
块根产量
sugarbeet
photosynthesis
accumulation of dry matter
beet yield
