摘要
水分胁迫对光合产物的积累与分配的模拟研究是作物栽培及灌溉管理的重要依据。基于山西霍泉灌溉试验站连续三年(2018年、2019年、2020年)水分胁迫试验资料,利用分配系数和分配指数两种方法进行冬小麦光合产物分配与转移的模拟研究,以确定性系数R2、相对误差RE为指标,对其模拟结果进行了评价。结果表明:①水分胁迫对作物生长相关性有一定的影响,会导致茎叶比减小,穗茎比、根冠比增大;②水分胁迫对分配系数有影响,对分配指数影响不明显;③两种方法对地上干物重模拟结果没有影响,但对作物产量的模拟,分配指数法优于分配系数法;④水分胁迫使茎光合产物转移率增大,对叶光合产物转移率无明显影响。在作物生长过程的模拟中,分配系数法、分配指数法模拟效果均很好,从整体上看,分配指数法优于分配系数法。但是,分配系数法机理性强,有助于理解冬小麦生长过程。
The simulation of the distribution and transfer of photosynthetic products under water stress is an important basis for crop cultivation and irrigation management.Based on the experimental data under water stress of Shanxi Provincial Huoquan Irrigation Experiment Station for three consecutive years(2018,2019 and 2020),in this study,two methods of distribution coefficient and distribution index were used to simulate the distribution and transfer of winter wheat photosynthetic products,and the coefficient of certainty R2 and relative error RE were used as indicators to evaluate the simulation results.The results show that:①Water stress has an influence on the balance coefficients of stem-leaf,ear-stem and root-canopy.It can decrease stem-leaf ratio and increase ear-stem ratio and root-canopy ratio.②Water stress has a certain influence on the distribution coefficient,while it has little effect on the distribution index.③The two methods have no effect on the simulation results of the dry matter on the ground,but for the simulation of crop yield,the distribution index method is better than the distribution coefficient method.④Water stress increases the transfer rate of photosynthetic products in stems,however,it has no obvious impact on the transfer rate of photosynthetic products in leaves.It can be concluded that:in the simulation of crop growth process,both the effects of distribution coefficient method and distribution index method are good.On the whole,the distribution index method is better than the distribution coefficient method.However,the distribution coefficient method has strong mechanism and is helpful to understand the growth process of winter wheat.
作者
豆静静
郑志伟
王仰仁
刘宏武
武朝宝
DOU Jing-jing;ZHENG Zhi-wei;WANG Yang-ren;LIU Hong-wu;WU Chao-bao(College of Water Conservancy Engineering,Tianjin Agricultural University,Tianjin 300392,China;Shanxi Provincial Central Irrigation Experiment Station,Wenshui 032100,Shanxi Province,China)
出处
《节水灌溉》
北大核心
2022年第5期7-13,共7页
Water Saving Irrigation
基金
国家自然科学基金项目(51779174)
天津市“项目+团队”重点培养专项(XB202016)
天津市科技支撑重点项目(18YFZCSF00650)。
关键词
冬小麦
分配系数
分配指数
光合产物
水分胁迫
生长过程模拟
干物质分配
干物质转移
winter wheat
distribution coefficient
distribution index
photosynthetic products
water stress
growth process simulation
dry matter distribution
dry matter transfer
