春玉米叶倾角与叶绿素含量变化及其关系研究  

作　　者：郭建鹏 张宝林[1,2,3] 何美玲 李瑞鑫 斯琴高娃 

机构地区：[1]内蒙古师范大学化学与环境科学学院,呼和浩特010020 [2]内蒙古自治区环境化学重点实验室,呼和浩特010020 [3]内蒙古节水农业工程研究中心,呼和浩特010020

出　　处：《智慧农业导刊》2024年第17期67-72,共6页JOURNAL OF SMART AGRICULTURE

基　　金：内蒙古自然科学基金项目(2022LHMS03009);内蒙古自治区科技重大专项课题(2021ZD0003-1);内蒙古师范大学基本科研业务费专项资金(2022JBTD009)。

摘　　要：叶倾角和叶绿素含量是玉米重要的表型特征。基于对呼和浩特市春玉米不同生育时期叶倾角、叶绿素相对含量(SPAD值)的观测,探讨叶倾角、叶绿素的变化及其关系,以期为玉米生长发育状态监测和生产管理提供理论依据。研究表明,随着生育进程的推进,玉米全株平均叶倾角和相同叶位叶倾角呈逐渐降低趋势;生长发育前期植株叶倾角随着叶位的升高呈S形曲线变化,而在生育后期则呈单峰曲线。叶绿素含量随着生育时期的推进呈现先增加后降低趋势,同一叶片叶绿素含量以叶尖最高转变为以叶中最高。全株叶倾角与SPAD值由生育前期的负相关转变为生育后期的正相关。玉米叶倾角、叶绿素含量及其关系变化符合理想株型冠层特征,反映植株生长中心转变和对环境条件变化的适应,研究结果可为玉米的生长发育状况评估提供技术支撑,为农业生产决策提供科学依据。Leaf inclination angle and chlorophyll content are important phenotypic characteristics of corn.Based on the observation of leaf inclination angle and relative chlorophyll content(SPAD value)of spring corn in Hohhot City during different reproductive periods,the changes of leaf inclination angle and chlorophyll and their relationship were investigated,in order to provide theoretical basis for the monitoring of corn's growth and development status and production management.The study showed that the average leaf inclination angle of the whole corn plant and the leaf inclination angle of the same leaf position tended to decrease gradually with the advancement of the reproductive process;the leaf inclination angle of the plant in the early stage of growth and development showed an S-shaped curve with the increase of leaf position,while in the late stage of reproduction,it showed a single-peak curve.Chlorophyll content showed an increasing and then decreasing trend with the advancement of the reproductive period,and the same leaf chlorophyll content was highest at the tip of the leaf and changed to be highest in the middle of the leaf.The whole-plant leaf inclination angle and SPAD value changed from a negative phase in the early reproductive period to a positive correlation in the late reproductive period.The changes in leaf inclination angle,chlorophyll content and their relationship are in line with the characteristics of ideal plant canopy,reflecting the transformation of plant growth center and adaptation to changes in environmental conditions.The results of this study can be used to provide technical support for the assessment of corn's growth and development status,and to provide scientific basis for decision-making in agricultural production.

关 键 词：玉米 叶倾角 SPAD 叶绿素 生育时期 

分 类 号：F323[经济管理—产业经济]