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以紧凑高抗玉米品种中单909为试验材料,种植密度为67 500株/hm2,研究拔节期至大喇叭口期分别喷施“增产胺”、“吨田宝”及“DA-6”3种不同类型化控剂对玉米产量及生长发育的影响。结果表明,喷施3种不同类型化控剂均可提高玉米子粒产量,“增产胺”和“吨田宝”的增产最为显著,较对照分别增产6.9%和6.6%;化控剂处理对行粒数和穗长影响不明显,明显缩短了秃尖长度,“增产胺”、“吨田宝”、“DA-6”处理分别较对照缩短23.9%、16.6%和28.3%;喷施“增产胺”同时增加穗粒数和千粒重,“吨田宝”增加玉米穗粒数,“DA-6”提高玉米的千粒重;“增产胺”与“吨田宝”处理后收获指数均明显高于对照,“DA-6”处理收获指数与对照差异不显著。与对照相比,化控处理后叶面积指数、各生育期生物总量均明显增加;对叶片SPAD值的影响存在差异,“增产胺”和“吨田宝”均提高穗位叶的SPAD值,“DA-6”对穗位叶SPAD值的影响不显著。
Taking the single 909 with compact and high resistance to maize variety as tested material, the planting density was 67 500 plants / hm2, and spraying “increasing amine”, “tiantianbao” and “ DA-6 ”three kinds of different types of chemical control of corn yield and growth and development. The results showed that spraying three different types of chemical control agents could increase maize grain yield. The yield increase of “yielding amine” and “tiantianbao” was the most significant, increasing 6.9% and 6.6% respectively comparing with the control; The effect of agent treatment on grain number and spike length was not obvious, the length of bald tip was obviously shortened, the treatments of “increasing yield amine”, “tianbao” and “DA-6” were shortened by 23.9% 16.6% and 28.3% respectively. Spraying “increasing amine” increased the number of grains per spike and 1000-grain weight at the same time, increased the number of grains per ear and “DA-6” The harvest index of “DA-6” and “DA-6” was not significantly different from that of the control. Compared with the control, the leaf area index and the total biomass of each growth stage were significantly increased after the chemical treatment. The effects on the SPAD value of the leaves were different, both “increasing amine” and “tianbao” Leaf SPAD value, “DA-6 ” had no significant effect on the spad leaf SPAD value.