新疆甜菜群体光合特性及与产量关系的研究  

Characteristic of Canopy Apparent Photosynthesis and Its Relation to the Beet Yield in Xinjiang

作　　者：勾玲[1] 刘日明[1] 肖华[1] 危常州[1] 

机构地区：[1]石河子大学新疆作物高产研究中心,石河子832003

出　　处：《石河子大学学报（自然科学版）》2000年第1期17-21,共5页Journal of Shihezi University(Natural Science)

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.\;

关 键 词：甜菜 光合速率 干物质累积 块根产量 

分 类 号：S556.3[农业科学—作物学]