AquaCrop模型在东北黑土区作物产量预测中的应用研究

崔颖, 蔺宏宏, 谢云, 刘素红

Application study of crop yield prediction based on AquaCrop model in black soil region of Northeast China

CUI Ying, LIN Hong-Hong, XIE Yun, LIU Su-Hong

表4 AquaCrop模型模拟东北黑土区典型作物生长的参数率定结果

Table 4 Calibrated parameters for simulating black soil area in Northeast China

符号Notation 含义 Description 单位 Unit 默认值 Default value 率定值Calibration value 玉米Maize 大豆Soybean Pexp-up 限制冠层伸展的土壤水分消耗上限阈值。 Soil water depletion threshold for canopy expansion-upper threshold. % of TAW 0.60 0.60 0.35 Pexp-lw 限制冠层伸展的土壤水分消耗下限阈值。 Soil water depletion threshold for canopy expansion-lower threshold. % of TAW 0.25 0.14 0 Pexshp 限制冠层伸展的水分胁迫系数曲线的形状因子。 Shape factor for water stress coefficient for canopy expansion. — 3.0 2.9 4.0 DeKcTr,x 因衰老、氮元素亏缺导致的作物系数下降速率。 Decline of crop coefficient as a result of ageing, nitrogen deficiency. % d-1 0.150 0.300 0.300 KcTr,x 冠层形成和枯萎前的作物系数。 Crop coefficient before canopy formation and senescence. — 1.10 1.05 1.10 Rexshp 根区根系伸展曲线的形状因子。 Shape factor describing root zone expansion. — 1.5 1.3 1.5 Zx 最大有效根深。 Maximum effective rooting depth. m 1.0 2.3 1.6 WP*yf 产量形成期的归一化水分生产力。 Water productivity normalized for ET0 and CO2 during yield formation. % 100 100 51 WP* 归一化水分生产力。 Water productivity normalized for ET0 and CO2. g m-2 17.0 33.7 15.0 CCx 最大冠层覆盖度。Maximum canopy cover. % 80 96 98 CGC 冠层生长系数。Canopy growth coefficient. % d-1 15.0 15.8 10.0 CDC 冠层衰减系数。Canopy decline coefficient. % d-1 12.8 11.7 21.3 HI0 参考收获指数。Reference harvest index. % 50 58 43