不同种植密度和甜菜碱浓度对玉米农艺性状的影响

Effects of different planting densities and betaine concentrations on agronomic traits of maize

为探究甜菜碱和种植密度对玉米的农艺性状的影响,设置不同的甜菜碱浓度和种植密度,分析玉米的穗长、穗粗、轴粗、穗行数、行粒数、穗重和百粒重等关键农艺性状。选取西藏林芝市巴宜区植物科学学院实习基地作为试验地,以“利合16”作为主要研究对象,试验处理共设置3个不同种植密度(M):45000株/hm(2 M1),90000株/hm^(2)(M2),135000株/hm^(2)(M3);3个不同甜菜碱浓度(T):5 mmol/L(T1),10 mmol/L(T2),15 mmol/L(T3),喷施清水(T0)为对照组。结果表明,甜菜碱浓度和种植密度对玉米的各项农艺性状具有显著影响。(1)高浓度的甜菜碱(T3处理)对玉米的穗长、行粒数等指标有显著的促进作用。(2)种植密度及甜菜碱互作对玉米百粒种和产量有显著性,M3T2处理时,玉米的单位面积产量最高,达12770.3 kg/hm^(2);在M1T3处理时,玉米的单株性状较优。

In order to explore the effects of betaine and planting density on the agronomic traits of maize,different betaine concentrations and planting densities were set up,and the key agronomic traits of maize,such as ear length,ear diameter,spike-stalk diameter,number of rows per ear,number of grains in row,ear weight and 100-grain weight were analyzed.In this study,the practice base of the Institute of Botany Sciences in Bayi District,Nyingchi City,Xizang was selected as the experimental site,and'Lihe 16'was selected as the main research object.A total of three different planting densities(M)were set in the experimental treatment,namely 45000 plants/hm^(2)(M1),90000 plants/hm^(2)(M2)and 135000 plants/hm^(2)(M3);another three different betaine concentrations(T)were also set,namely 5 mmol/L(T1),10 mmol/L(T2),15 mmol/L(T3),while the spraying water(T0)as the control group.The results showed that betaine concentration and planting density had significant effects on the agronomic traits of maize.(1)High concentration of betaine(T3 treatment)had a significant effect on the ear length and grain number of maize.(2)Planting density and betaine interaction had significant effects on 100-grain seed and yield of maize.When treated with M3T2,the yield per unit area of maize was the highest,reaching 12770.3 kg/hm^(2).In the M1T3 treatment,the single plant traits of maize were better.