摘要
为了解大豆对带状复合种植体系中植株两侧不同强度光照的形态响应特征,用遮阳网对套作主推大豆品种南豆12植株分别进行单侧和全株遮阴,测定遮阴0、10、20和30d时的主茎长、茎粗、主茎节数、叶面积、比叶面积和生物量积累相关指标的变化。结果显示,与正常光照相比,单侧及全株遮阴均使大豆植株的主茎明显伸长,茎粗减小,主茎节数明显减少。单侧遮阴后,大豆叶面积和比叶面积明显增大,且遮阴侧的比叶面积显著大于不遮阴的一侧,但都小于全株遮阴。单侧遮阴还造成大豆植株地上部分生物量、茎生物量、叶片及叶柄生物量均显著减小,且生物量在遮阴侧的减小幅度要大于不遮阴的一侧,但都小于全株遮阴。从结果可以看出,单侧遮阴会引起大豆植株明显的适应性反应,包括遮阴的一侧和不遮阴的一侧。单侧遮阴下,大豆植株未遮阴的一侧会补偿遮阴一侧的生长,表现出对两侧不同光环境的整体适应。
In order to explore the morphological response of strip cropped soybean to different light environment on two sides,soybean cultivar Nandou 12 were shaded with shade net by one side and both sides,respectively.Main stem length,stem diameter,pitch number of stems,leaf area,specific leaf area and biomass accumulation were measured at the 0,10 th,20th,and 30 thdays after shade. Results showed that elongation,thinness,and pitch number of main stems of soybean significantly decreased under unilateral shade and bilateral shade. After unilateral shade treatment,the leaf area of soybean significantly increased,so did the specific leaf area. Moreover,the specific leaf area on shaded side was larger than that on non- shaded side,but both smaller than that of bilateral shaded plants. Besides,unilateral shade treatment also caused the decline of biomass of plant,stem,leaf and petiole.And the biomass on shaded side decreased more than that on the non- shaded side,but less than that of bilateral shaded plants. In conclusion,the shade responses could be found in soybean under unilateral shade treatment,on both shaded and non- shaded side. The non- shaded side of unilateral shade treated plants displayed a compensatory effect on morphology of the shaded side,showing an overall adaption to different light environment on two sides of the plant.
出处
《中国油料作物学报》
CAS
CSCD
北大核心
2017年第1期60-64,共5页
Chinese Journal of Oil Crop Sciences
基金
国家自然科学基金(31371555)
关键词
大豆
单侧遮阴
形态特征
生物量
soybean
unilateral shade
morphological characteristics
biomass
