旱作种植条件下基础地力贡献率演变特征及影响因素分析

李官沫,张文菊,曲潇琳,乔磊,黄亚萍,徐虎,徐明岗

Evolution Characteristics and Influencing Factors on Inherent Soil Productivity Across Dryland

LI GuanMo,ZHANG WenJu,QU XiaoLin,QIAO Lei,HUANG YaPing,XU Hu,XU MingGang

表3 随机森林模型解释率

Table 3 Var explained (%) in random forest model

作物类型 Crop type 全国 The whole China 区域 Region 时间 Time period 东北 Northeast China 华北 North China Plain 长江中下游 The middle and lower reaches of Yangtze River 西北 Northwest China 西南 Southwest China 1980s 1990s 2000s 2010s 小麦Wheat 32.15 - 3.41 20.79 49.54 20.53 5.28 28.6 35.97 33.96 玉米Maize 50.34 40.38 3.19 47.63 68.03 46.07 19.33 42.34 66.54 49.97