间作对氮调控玉米光合速率和光合氮利用效率的影响

朱启林,向蕊,汤利,龙光强

Effects of intercropping on photosynthetic rate and net photosynthetic nitrogen use efficiency of maize under nitrogen addition

Qi-Lin ZHU,Rui XIANG,Li TANG,Guang-Qiang LONG

表1 不同氮水平对玉米产量、生物量的影响(×103 kg·hm-2)(平均值±标准偏差)

Table 1 Effects of N levels on yield and biomass of maize (×103 kg·hm-2)(mean ± SD)

氮水平 N level (kg·hm-2) 产量 Yield 生物量 Biomass 土地当量比 Land equivalent ratio I M I M 0 (N0) 7.54 ± 0.23Aa 5.18 ± 0.71Aa 17.62 ± 1.01Aa 14.88 ± 1.24Aa 1.46 125 (N1) 12.30 ± 1.57Ab 9.99 ± 1.63Ab 25.69 ± 0.52Ab 21.84 ± 0.73Bb 1.23 250 (N2) 14.40 ± 1.67Ab 11.69 ± 1.97Bb 28.82 ± 1.88Ac 24.90 ± 2.73Bc 1.23 375 (N3) 14.29 ± 1.47Ab 11.92 ± 1.11Bb 28.63 ± 2.33Ac 25.20 ± 1.75Bc 1.20