密度与化学调控对嫩单22农艺性状及茎秆性状的影响  

Effects of Density and Chemical Regulation on Agronomic Characters and Stem Traits of Nendan 22

作　　者：周超[1] 王俊强[1] 韩业辉[1] 徐婷[1] 于运凯[1] 王振[1] 丁昕颖 马宝新[1] ZHOU Chao;WANG Junqiang;HAN Yehui;XU Ting;YU Yunkai;WANG Zhen;DING Xinying;MA Baoxin(Qiqihar Branch,Heilongjiang Academy of Agricultural Sciences,Qiqihar 161006,China;Animal Husbandry and Veterinary Branch,Heilongjiang Academy of Agricultural Sciences,Qiqihar 161000,China)

机构地区：[1]黑龙江省农业科学院齐齐哈尔分院,黑龙江齐齐哈尔161006 [2]黑龙江省农业科学院畜牧兽医分院,黑龙江齐齐哈尔161000

出　　处：《黑龙江农业科学》2023年第5期1-5,共5页Heilongjiang Agricultural Sciences

基　　金：黑龙江省农业科学院院级项目(2021YYYF023);齐齐哈尔市科技计划创新激励项目(CNYGG-2022042)。

摘　　要：为构建适宜的玉米群体结构,实现玉米高产抗逆栽培,以嫩单22为试验材料,设置4个种植密度水平,分别为6.00×10^(4)株·hm^(-2)(M1)、6.75×10^(4)株·hm^(-2)(M2)、7.50×10^(4)株·hm^(-2)(M3)、8.25×104株·hm-2(M4),在8叶展叶期喷施化学调控剂玉多十(HK)和清水对照(CK)2个处理。结果表明,随种植密度的增大,株高、穗位高显著增高,茎秆节间长变长,茎粗变小,扁率增大,茎秆强度变弱。HK处理较CK,株高、穗位高显著降低,4~5节位节间长大幅度减少,茎粗增加,扁率降低,茎秆强度增强。化学调控处理后,茎秆的压折强度与穿刺强度增强,其中,茎秆4~5节位提升幅度最大。倒伏率随种植密度的升高呈上升趋势,化学调控处理可显著降低倒伏率,4个种植密度下倒伏率分别比对照降低了34.62%、43.81%、37.26%和30.82%。In drder to construct a suitable maize population structure and achieve high yield and stress resistance cultivation of maize,in this experiment,Nendan 22 was used as the test material,and four planting density levels were set,which were 6.00×10^(4)plants·ha^(-1)(M1),6.75×10^(4)plants·ha^(-1)(M2),7.50×10^(4)plants·ha^(-1)(M3)and 8.25×10^(4)plants·ha^(-1)(M4)were sprayed with chemical regulator Yuduoshi(HK)and clear water control(CK)at the 8th leaf expansion stage.The results showed that with the increase of planting density,the plant height and spike height increased significantly,the internode length of stem became longer,the stem diameter became smaller,the flattening rate increased,and the stem strength became weaker.After HK treatment,plant height and spike height decreased significantly,internode length at 4-5 nodes decreased,stem diameter increased,flattening rate decreased,and stem strength increased.After chemical control treatment,the transverse bending strength and puncture strength of the stem increased,with the largest increase in the 4-5 nodes of the stem.The lodging rate increased with the increase of planting density,and the lodging rate could be significantly reduced by chemical control treatment,which decreased by 34.62%,43.81%,37.26%and 30.82%respectively compared with the control under four planting densities.

关 键 词：嫩单22 化学调控技术 农艺性状:茎秆性状 

分 类 号：S513[农业科学—作物学]