不同施钾量处理对玉米倒伏率、农艺性状及产量的影响  

Effects of Potassium Application Rates on Lodging Rate,Agronomic Characters and Yield of Maize

作　　者：宋英博[1] Song Yingbo(Jiamusi Branch of Heilongjiang Academy of Agricultural Sciences,Jiamusi Heilongjiang 154007)

机构地区：[1]黑龙江省农业科学院佳木斯分院,黑龙江佳木斯154007

出　　处：《中国农学通报》2021年第30期14-18,共5页Chinese Agricultural Science Bulletin

基　　金：黑龙江省农业科学院院级科研项目“三江平原玉米最优施肥模型的研究与应用”(2020YYYF049)。

摘　　要：研究不同施钾量对玉米倒伏率、各农艺性状及产量的影响,以期为黑龙江省玉米抗倒性栽培及钾肥的科学管理提供理论依据。本研究通过设置5个不同施钾量下,对玉米各农艺性状及产量方差分析,并研究玉米倒伏率与各农艺性状之间相关性。结果表明,T_(2)处理株高和穗长与其他处理间均存在着显著差异;T_(0)处理的穗位和秃尖长与其他处理间均存在着显著性差异。在产量性状方面,T_(2)处理的穗行数、行粒数最多,百粒重最大,产量最高,玉米倒伏率与穗位高、秃尖长呈显著正相关,与穗行数、行粒数、百粒重及产量均呈显著负相关。适量的钾肥可以提高玉米抗倒能力,随着施钾量的增加玉米倒伏率呈现出先降后升的趋势,根据以上5个不同施钾量处理,T_(2)处理玉米倒伏率最低。To provide a theoretical basis for maize lodging resistance cultivation and potassium fertilizer management in Heilongjiang Province,the effects on lodging rate,agronomic characters and yield of maize under different potassium application rates were studied.In this study,the author analyzed the agronomic characters and yield variance of maize under different potassium application amount,and studied the correlation between maize lodging rate and agronomic characters.The results showed that there were significant differences in plant height and panicle length between T_(2)treatment and other treatments.There were significant differences in ear position and bald tip length between T_(0)treatment and other treatments.In terms of yield characters,T_(2)treatment had the largest number of rows and grains per ear,the largest 100-grain weight,and the highest yield.The lodging rate of maize was significantly and positively correlated with the height of ears and the length of bald tip,but negatively correlated with the number of rows per ear,the number of grains per row,100-grain weight and yield.With the increase of potassium application amount,the lodging rate of corn decreased first and then increased,and the lodging rate of corn in T_(2)treatment was the lowest.

关 键 词：倒伏 钾肥 玉米 产量 

分 类 号：S158.3[农业科学—土壤学]