日光温室内南北方向黄瓜群体结构参数分析

Analysis of Cucumber Canopy Architectural Parameters in the North and South Directions in Sunlight Greenhouse

为研究日光温室内南北方向和垂直方向作物群体结构参数,观测了日光温室内南北方向北、中、南3段及垂直方向各层次的黄瓜群体结构参数,结果表明,在整个生育期平均叶倾角都是北段大于中段和南段,叶片分布频率偏南的趋势也是北段最大,中段次之,南段最低;在垂直方向0~40 cm高度冠层的平均叶倾角最大、叶片分布频率偏南段最低,其他各高度冠层叶片叶角之间无明显规律,但总体趋势均为植株南面叶倾角和叶片分布频率均大于植株北面;黄瓜叶面积系数和株高由北向南逐渐升高,各段不同层次叶面积密度也存在一定差异。试验结果说明,温室南北方向各段黄瓜群体参数结构明显不同,垂直方向各层黄瓜群体结构参数具有一定差异性。

In order to study cucumber population structure parameters in north,south and vertical directions in sunlight greenhouse,cucumber canopy architectural parameters from north to south directions and in different vertical layers were observed.The results showed that the average leaf zenith angle in the north was bigger than that in the south and in the middle part during the whole bearing period;the tendency of leaves distribution frequency was the highest in the north,next in the middle and the lowest in the south;the average leaf zenith angle was the biggest in 0-40 cm canopy layer in vertical direction,and the leaves distribution frequency towards south was the lowest,while in other canopy layers there were no obvious regularity among leaves and leaf zenith.However,the general trend was that the plant＇s leaf zenith and the leaf distribution frequency in the south were bigger than those in the north.The leaf area index and plant height increased from north to south gradually.In conclusion,cucumber canopy architectural parameters in different layers were different greatly in north and south directions in greenhouse,and the cucumber canopy architectural parameters in different layers in vertical direction had certain difference.