日光温室番茄(Lycopersicon esculentum)群体冠层内光能截获特征及其光环境分析  

Impact of the Light Directions on Light Distribution of Tomato (Lycopersicon esculentum) Canopy in Solar Greenhouse

作　　者：王蕊[1] 吴海涵[1] 李天来[1] 

机构地区：[1]沈阳农业大学园艺学院/辽宁省设施园艺重点实验室,沈阳110161

出　　处：《沈阳农业大学学报》2013年第5期570-574,共5页Journal of Shenyang Agricultural University

基　　金：国家自然科学基金项目(31000921);国家科技支撑计划项目(2008BADA6B01);沈阳农业大学研究生创新培育项目

摘　　要：通过试验设置完全封闭、行间开放、行内开放和完全开放4个不同的遮阴处理,把日光温室番茄冠层内复杂的光环境按方向逐渐分解,对光合有效辐射的采样数据进行统计分析,探究冠层内光能辐射传递在垂直方向和水平方向上的分布构成及空间分布的异质性,对冠层内光截获的主要影响因子进行相关性分析。统计分析表明,行间和行内的光线分量主要对200~800μmol·m-2·s-1冠层内光合有效辐射产生影响。通过比较冠层内的光合有效辐射数据的离散程度及变异特性得出,番茄植株整体的光合有效辐射均值存在很大程度的不均匀性,中下部变异系数CV〉0.50。对冠层内光截获的主要影响因子进行相关性分析得出,冠层内光合有效辐射与冠层高度呈极显著正相关（r=0.976）,与累积叶面积指数呈负相关（r=-0.952）,与光线方向及入射光线时间相关显著（r=0.910,r=0.952）。To investigate the light variations and heterogeneity in vertical and horizontal direction, statistic data of PAR was investigated and correlations of PAR, time, light direction, canopy height and cumulated LAI were also analyzed. The decline of light in vertical direction inside canopy was most obvious and the effect of different shade treatments of PAR on the top of canopy were not strong, mainly for the middle and lower parts of it. Statistical data showed that 200-800μmol.m-2.s^-1 PAR were mainly effected by the light between lines and inside lines. The discrete level and the variance characteristic were compared; it showed that the distribution of PAR was uneven, CV〉 0.5 at the bottom of the plant. By the analyzing of main light effected factors, the PAR inside canopy and canopy height was obviously positive correlativity, r=0.976. Cumulated LAI correlativity was negative with the PAR, r=-0.952; the light direction and time were positive corrclativity with the PAR, the correlativity was 0.910 and 0.952 individual.

关 键 词：遮光 光线方向 冠层 光合有效辐射 番茄 

分 类 号：S641.2[农业科学—蔬菜学] Q945.11[农业科学—园艺学]