叶面喷锌对糯玉米生理特性、籽粒锌含量及产量的影响

Effects of Foliar Application of Zinc on Physiological Characteristics,Grain Zn Content and Yield of Waxy Corn

研究不同喷锌量[0(对照)、0.75、2.25、3.75、5.25 kg/hm^2]对4个糯玉米品种(晋糯18、晋糯20、彩甜糯1965、晋单糯41)生理特性、籽粒锌含量及产量的影响,以期为糯玉米生物锌强化及高产提供理论依据。结果表明,叶面喷锌0.75~5.25 kg/hm^2可有效提高糯玉米的叶绿素含量、过氧化物酶(POD)活性,降低丙二醛(MDA)含量,有效提高籽粒锌含量和产量。4个糯玉米品种籽粒锌含量均在喷锌5.25 kg/hm^2条件下最高,分别为16.35、18.23、18.34、20.13 mg/kg,分别比对照提高22.20%、13.44%、17.56%、22.67%,其中晋单糯41籽粒锌含量最高。晋糯18产量在喷锌5.25 kg/hm^2条件下最高,为18371.55 kg/hm^2;晋糯20、彩甜糯1965、晋单糯41均在喷锌3.75 kg/hm^2条件下最高,分别为15661.65、13034.70、16107.45 kg/hm^2;4个糯玉米品种最高产量分别比对照提高26.83%、8.52%、5.13%、11.56%。综合考虑,晋糯18、晋单糯41为锌含量较高品种,可推广种植。

The effects of different zinc spraying rates[0(control),0.75,2.25,3.75,5.25 kg/ha]on the physiological characteristics,grain zinc content and yield of four waxy corn varieties(Jinnuo 18,Jinnuo 20,Caitiannuo 1965,Jindannuo 41)were studied,so as to provide theoretical basis for waxy corn biological zinc strengthening and high yield.The results showed that foliar zinc application rate of 0.75—5.25 kg/ha could effectively increase the chlorophyll content and peroxidase(POD)activity of waxy corn,reduce the content of malondialdehyde(MDA),and enhance the zinc content and yield of grain.The zinc contents of grain of the four waxy corn varieties were the highest under the condition of 5.25 kg/ha zinc,which were 16.35,18.23,18.34 mg/kg and 20.13 mg/kg,increased by 22.20%,13.44%,17.56%and 22.67%compared with the control,of which zinc content of grain of Jindannuo 41 was the highest.The yield of Jinnuo 18 was the highest under the condition of 5.25 kg/ha zinc,which was 18371.55 kg/ha;Jinnuo 20,Caitiannuo 1965 and Jindannuo 41 all had the highest yields under 3.75 kg/ha zinc,which were 15661.65,13034.70 kg/ha and 16107.45 kg/ha respectively,and the highest yields of the four waxy corn varieties increased by 26.83%,8.52%,5.13%and 11.56%compared with the control.By comprehensive consideration,Jinnuo 18 and Jindannuo 41 had higher zinc content,and could be promoted for planting.