基于磷肥施用深度的夏玉米根层调控提高土壤氮素吸收利用

陈晓影,刘鹏,程乙,董树亭,张吉旺,赵斌,任佰朝,韩坤

The root-layer regulation based on the depth of phosphate fertilizer application of summer maize improves soil nitrogen absorption and utilization

Xiao-Ying CHEN,Peng LIU,Yi CHENG,Shu-Ting DONG,Ji-Wang ZHANG,Bin ZHAO,Bai-Zhao REN,Kun HAN

表2 磷肥施用深度对植株中氮积累量、转运及吸收利用的影响

Table 2 Effects of phosphate fertilizer application depth on nitrogen accumulation, translocation, absorption and utilization in plants

年份 Year 处理 Treatment 氮素积累量 Accumulation amount (kg hm-2) 营养器官向籽粒 的转运量 Translocation amount (kg hm-2) 营养器官向 籽粒的转运率 Translocation rate (%) 氮素吸收效率 NAE (kg kg-1) 氮肥偏生产力 NPFP (kg kg-1) R2 R6 2017 CK 144.59 e 204.62 e 34.71 d 32.03 b 64.96 e 24.32 d P5 168.11 d 225.28 d 41.69 cd 33.81 ab 71.52 d 26.33 cd P10 209.55 b 253.50 c 57.87 ab 37.04 ab 80.48 c 29.45 ab P15 226.23 a 283.34 a 64.22 a 38.74 a 89.95 a 31.82 a P20 199.50 c 264.56 b 48.99 bc 34.22 ab 83.99 b 28.34 bc 年份 Year 处理 Treatment 氮素积累量 Accumulation amount (kg hm-2) 营养器官向籽粒 的转运量 Translocation amount (kg hm-2) 营养器官向 籽粒的转运率 Translocation rate (%) 氮素吸收效率 NAE (kg kg-1) 氮肥偏生产力 NPFP (kg kg-1) R2 R6 2018 CK 164.71 e 228.13 d 46.91 c 50.47 b 72.42 d 29.44 c P5 205.48 d 278.45 c 55.83 b 51.76 ab 88.40 c 31.43 c P10 209.86 c 280.63 c 56.34 b 52.14 ab 89.09 c 35.12 b P15 245.50 a 311.45 a 67.42 a 53.49 a 98.87 a 38.66 a P20 225.24 b 295.08 b 58.11 b 51.84 ab 93.68 b 34.99 b