典型黑土春玉米化学肥料养分利用效率变化研究

仇少君,李宁,何萍,魏丹,金梁,赵士诚,徐新朋,周卫

Nutrients Use Efficiency Change of Chemical Fertilizers for Spring Maize in a Typical Black Soil

Ning LI,Ping HE,Wei ZHOU,Dan WEI,Liang JIN,ShiCheng ZHAO,XinPeng XU,ShaoJun QIU

表4 2014—2016年不同处理播前和收获后0—30 cm土壤剖面速效磷钾储量（kg·hm-2）

Table 4 Soil available phosphorus and available phosphorus content above 30 cm soil depth at pre-sown and post-harvested under different treatments from 2014 to 2016

处理 Treatment 速效磷Available Phosphorus 速效钾Available Potassium 2014 2015 2016 2014 2015 2016 播前 Pre-sown 收获 Post- harvested 播前 Pre-sown 收获 Post- harvested 播前 Pre-sown 收获 Post- harvested 播前 Pre-sown 收获 Post- harvested 播前 Pre-sown 收获 Post- harvested 播前 Pre-sown 收获 Post- harvested CK 78.9b 84.0c 65.2c 68.1c 43.0a 39.8a 698.7b 797.4a 551.5a 477.2bc 504.6a 489.8a PK 147.9a 136.6b 125.4a 95.7a 54.7a 46.9a 901.1a 838.4a 581.5a 591.1a 513.7a 508.5a NK 95.0b 82.7c 75.6c 77.6bc 46.1a 39.0a 795.0ab 826.8a 593.7a 531.1ab 530.2a 609.2a NP 147.5a 132.1b 108.2ab 94.1a 50.3a 49.0a 761.9b 803.6a 559.2a 427.5c 504.9a 487.1a NPK 154.7a 149.9a 101.4b 86.9ab 53.4a 50.2a 767.0ab 837.4a 587.6a 532.1ab 520.3a 508.1a