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Position: Home > Articles > Simulating study on leaf area index of spring wheat in dryland under different nitrogen fertilization schemes based on APSIM model Journal of Gansu Agricultural University 2020,55 (3) 38-44+53

基于APSIM模型的不同氮肥方案小麦叶面积指数的模拟研究

作  者:
逯玉兰;李广;闫丽娟;燕振刚;聂志刚;董莉霞
单  位:
甘肃农业大学信息科学技术学院;甘肃农业大学农学院;甘肃农业大学林学院
关键词:
旱地春小麦;叶面积指数;不同氮肥方案;APSIM模型
摘  要:
【目的】了解黄土丘陵沟壑区域旱地春小麦叶片的生长规律.【方法】在田间试验的基础上,调试APSIM模型参数,利用调参后的APSIM模型模拟低氮量N_1、中氮量N_2和高氮量N_3 3种氮肥方案下小麦整个生育期叶面积指数的动态变化过程.【结果】APSIM模型对不同氮肥方案下小麦叶面积指数的模拟有较高的精度,均方根误差(RMSE)范围在0.100~0.366,决定系数(R~2)介于[0.808,0.975],有效性指数(Me)的范围在0.507~0.911.在中氮方案下的RMSE值最小,R~2值最大,Me值最大.【结论】在中氮方案下APSIM模型表现出更好的一致性,更高的解释程度和更好的有效性;其次是低氮方案;高氮方案下的模拟效果较差.
译  名:
Simulating study on leaf area index of spring wheat in dryland under different nitrogen fertilization schemes based on APSIM model
作  者:
LU Yu-lan;LI Guang;YAN Li-juan;YAN Zhen-gang;NIE Zhi-gang;DONG Li-xia;College of Information Science and Technology,Gansu Agricultural University;College of Forestry,Gansu Agricultural University;College of Agriculture,Gansu Agricultural University;
关键词:
dryland spring wheat;;LAI;;different nitrogen fertilization scheme;;APSIM model
摘  要:
【Objective】 In order to understand the growth pattern of dry land spring wheat leaves in the loess hilly and gully region.【Method】 On the basis of field experiment,the parameters of APSIM model were adjusted,the dynamic change process of leaf area index in whole growth period of wheat was simulated with adjusted APSIM model.【Result】 APSIM model had high accuracy in the simulation of wheat leaf area index under different nitrogen fertilization schemes,RMSE ranged from 0.100 to 0.366,R~2 was between 0.808 and 0.975,Me ranged from 0.507 to 0.911.The RMSE value was the lowest,R~2 value was the highest and Me value was the highest under the medium nitrogen scheme.【Conclusion】 APSIM model shows better consistency,higher interpretation and better effectiveness under medium nitrogen scheme,followed by low nitrogen scheme,and the simulation effect under high nitrogen scheme is poor.

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