不同密度对芝麻农艺性状及产量的影响

Effect on Agronomic Traits and Yield of Different Densities in Sesame

试验于2008-2009年在辽宁省农业科学院作物研究所旱田试验地进行。以辽芝1号芝麻为材料,采用单因子试验,随机区组排列,3次重复;设6个密度：18.0、16.5、15.0、13.5、12.0、10.5万株·hm^-2,其中10.5万株·hm^-2为对照。底肥施N、P、K复合肥225 kg·hm^-2。结果表明：密度对株高的影响：13.5〉10.5〉16.5〉12.0〉18.0〉15.0,12.0万株·hm^-2处理的密度对株高的影响较稳定;密度对叶片数的影响：10.5〉15.0〉16.5〉13.5和18.0〉12.0,在密度为12.0和13.5万株·hm^-2的处理下,密度对叶片数的影响较稳定;密度对茎干重的影响：13.5〉12.0〉10.5〉15.0〉16.5〉18.0,12.0和13.5万株·hm^-2处理的密度对茎干重的积累有促进作用;密度对叶干重的影响：13.5〉12.0〉15.0〉10.5〉16.5〉18.0,12.0和13.5万株·hm^-2处理的密度对叶干重的积累有促进作用;密度对叶面积的影响：10.5〉15.0〉16.5〉18.0〉13.5〉12.0,15.0万株·hm^-2处理的密度对叶面积有促进作用;密度对叶绿素含量的影响：10.5〉13.5〉16.5〉15.0〉12.0〉18.0;合理的增加种植密度可提高初花期叶绿素的含量;密度对产量的影响：12.0〉13.5〉16.5〉18.0〉15.0〉10.5,密度为12.0万株·hm^-2的处理产量增长率最大,其次是密度为13.5万株·hm^-2的处理。从总体看,芝麻的种植密度在12.0-13.5万株·hm^-2最为适宜。

Taking seed of Liaozhi No.1 as experiment material,in dry farmland of the Grops Reserch Institute of Liaoning Provincial Academy of Agricultural Sciences carried out by the test.Single-factor experiments,randomized block with three repeat,and 6 density levels were established;fertilizer N,P,K compound fertilizer is 225 kg·hm^-2.Reproductive traits,dry matter accumulation,leaf area,chlorophyll content and yield traits of Liaozhi No.1 by different density were analyzed.The results indicated that the density to the high influence change order was 135105165120180150,the density 120 thousand plants·hm^-2 processing was stable to a high influence;The density to the number of leaves the influence change order was 105 150165135（180） 120,in the density 120 thousand plants·hm^-2 and under 135 thousand plants·hm^-2 processing,the density the influence was stable to the number of leaves;Density to the stem heavy influence change order was 135120105150165180,120 and 135thousand plants·hm^-2 processing densities have the promoter action to the stem heavy accumulation;The density to the leaf dry weight＇s influence change order was 135120150105165180,120 and 135 thousand plants·hm^-2 processing densities have the promoter action to the leaf dry weight＇s accumulation;The density to the leaf area＇s influence change order was 105150165180135120,150 thousand plants·hm^-2 processing densities have the promoter action to the leaf area;The density to the chlorophyll content＇s influence change order was 105135165150120180,reasonable increases the planting density to be possible to enhance the first flowering time chlorophyll the content;The density to the output the influence change order was 120135165180150105,the density 120 thousand plants·hm^-2 processing output rate of increment was biggest,next was the density 135 thousand plants·hm^-2 processing.Looked from the overall： Sesame seed＇s planting density was suitable in 120-135 thousand plants·hm^-2.