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Chinese Journal of Applied Ecology ›› 2021, Vol. 32 ›› Issue (3): 913-920.doi: 10.13287/j.1001-9332.202103.022

• Original Articles • Previous Articles     Next Articles

Evaluating the effects of different sowing dates and tillage methods on dry-land wheat grain dry matter accumulation based on the APSIM model

NIE Zhi-gang1, LI Guang2*, WANG Jun1, DONG Li-xia1, LUO Cui-ping1, MI Rong-juan1   

  1. 1College of Information Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2020-06-23 Accepted:2020-12-11 Online:2021-03-15 Published:2021-09-15
  • Contact: * E-mail: lig@gsau.edu.cn
  • Supported by:
    National Natural Science Foundation of China (31660348), the Innovation Foundation of Colleges and Universities of Gansu Province (2020B-121), the Science and Technology Innovation Foundation of Gansu Agricultural University (GAU-STS-2018-12), the Development Foundation of College of Information Science and Technology of Gansu Agricultural University (GAU-XKFZJJ-2020-04) and the Financial Special Project of Gansu Province (GSCZZ-20160909)

Abstract: Accurate simulation of dry matter accumulation in wheat grains can provide important technical support for regulating wheat production in hilly areas of Loess Plateau. Using the APSIM model, we analyzed dryland wheat grain dry matter accumulation and distribution using the meteorological data from 1971 to 2017 in Anding District, and the field test data from 2016 to 2017 in Anjiagou Village, Fengxiang Town, Anding District, Dingxi City, Gansu Province. Furthermore, the influence of sowing date and tillage method on dry matter accumulation of wheat grain was quantitatively analyzed on the basis of model validation. The results showed that the root mean square error (RMSE) between the simulated and measured values of grain dry matter was 57.5-143.1 kg·hm-2 and the normalized root mean square error (NRMSE) was 1.4%-9.9% under the three sowing dates and four tillage methods, respectively. The precision of the APSIM model was satisfactory. Under different sowing dates, the order for beneficial degree of tillage treatment to dry matter accumulation in wheat grains was no tillage with straw cover > conventional tillage with straw cover > no tillage > conventional tillage. The treatment of no tillage with straw covered was the most favora-ble to dry matter accumulation in wheat grains, with no significant difference between no tillage and conventional tillage treatments. Under different farming methods, early sowing was better than normal sowing and late sowing for the dry matter accumulation process of wheat. Late sowing had stronger impacts on dry matter accumulation, with the least ideal accumulation process.

Key words: wheat, grain, dry matter accumulation, APSIM, crop model, simulation