增密对我国玉米产量-叶面积指数-光合速率的影响

侯佳敏,罗宁,王溯,孟庆锋,王璞

Effects of Increasing Planting Density on Grain Yield, Leaf Area Index and Photosynthetic Rate of Maize in China

HOU JiaMin,LUO Ning,WANG Su,MENG QingFeng,WANG Pu

表2 不同年代玉米品种种植密度及产量相关信息分析

Table 2 Analysis of planting density and yield related information of maize varieties in different ages

年代 Time 品种 Variety 参考文献 Reference 密度 Planting density (×104 plants/hm2) 产量 Grain yield (t·hm-2) 最大叶面积指数 LAImax (m2·m-2) 最大净光合速率 Pnmax (μmol·m-2·s-1) 1950s 金皇后,小粒红,白马牙等 Jinhuanghou, Xiaolihong, Baimaya et al. [4], [19] 5.6(5.25-6) 4.2(2.1-4.9) — 16.9 1960s 沈单7号,丹玉13号,中单2号等 Shendan 7, Danyu 13, Zhongdan 2 et al. [19], [20], [21] 5.2(3.5-6.75) 6.3(4.4-7.1) 4.7(4.6-4.7) 17.7(16-19.3) 1970s 群单105,郑单2号,烟三6号等 Qundan 105, Zhengdan 2, Yansan 6 et al. [4], [19], [20], [22] 5.5(4.5-6.75) 6.3(4.5-7.2) — 18.7 1980s 掖单2号,鲁玉3号,鲁玉5号等 Yedan 2, Luyu 3, Luyu 5 et al. [19], [20], [21], [22] 5.3(3.5-6.75) 7.2(5.1-7.9) 5.1(5-5.3) 21.4(20.7-22) 1990s 本玉9号,吉单180,掖单13等 Benyu 9, Jidan 180, Yedan 13 et al. [4], [19], [20], [22] 5.7(4.5-6.75) 8.4(4.7-10.3) — 20.5 2000s 郑单958,农大108,掖单13号 Zhengdan 958, Nongda 108, Yedan 13 et al. [19], [20], [21] 5.4(4.5-6.75) 9.8(7.5-10.9) 5.9(5.7-6.2) 23.1(22.1-24.1)