两品种小麦间、混播对其茎秆形态特征和抗倒性能的影响OA北大核心CSTPCD
Effects of Intercropping and Mixed Sowing on Stem Morphological Characteristics and Lodging Resistance of Two Wheat Varieties
为明确间、混播对冬小麦抗倒伏的影响,本试验以山农20(SN20)和山农优麦2号(YM2)为材料,设置常规条播(单播)及二者隔行间播(SN20//YM2,1∶1)和等量混播(SN20×YM2,1∶1)3种种植方式,研究不同种植方式下品种间抗倒伏指数、茎秆形态特征及基部第二节间抗折力等的差异,并进行品种、种植方式及二者互作对小麦抗倒伏性状影响的方差分析.结果表明,间、混播较单播可显著降低小麦重心高度、株高,显著增加第二节间茎粗、壁厚、抗折力以及抗倒伏指数,尤以混播表现最好,但与间播整体上差异不显著;种植方式对第二节间壁厚、抗折力以及抗倒伏指数影响最大.混播方式下,YM2灌浆期和成熟期的抗倒伏指数最大,相比于单、间播分别显著增加54.50％、10.89％和65.77％、30.22％.综上表明,本试验条件下,间、混播可降低冬小麦株高、重心高度,增加基部第二节间茎粗、壁厚和抗折力,有效提升小麦抗倒伏指数,从而降低冬小麦倒伏风险,促进抗逆稳产.该结论可为山东省冬小麦高产稳产和抗倒伏栽培提供参考依据.
In order to clarify the effects of intercropping and mixed sowing on lodging resistance of winter wheat,the experiment was conducted using Shannong 20(SN20)and Shannong Youmai 2(YM2)as materi-als by setting three planting methods including conventional strip sowing(single sowing),intercropping in in-tervals(SN20//YM2,1∶1)and mixed sowing with equal mass(SN20×YM2,1∶1).The differences in lodg-ing resistance index,stem morphological characteristics and breaking-resistant strength of the second internode under different planting methods were studied,and also the variance analysis of the effects of cultivars,plant-ing methods and their interactions on lodging resistance characters.The results showed that the intercropping and mixed sowing could significantly reduce the height of the centre of gravity and plant height compared to single sowing,but significantly increase the stem diameter,wall thickness,breaking-resistant strength and lodging resistance index of the second internode,mixed sowing performed the best,but the overall difference between intercropping and mixed sowing was not significant.Planting methods had the greatest influences on wall thickness and breaking-resistant strength of the second internode,and lodging resistance index.In the mixed sowing method,the lodging resistance index of YM2 was significantly increased by 54.50％and 10.89％at filling stage,and 65.77％and 30.22％at maturation stage compared with single sowing and intercropping,respectively.In conclusion,under the conditions of this experiment,intercropping and mixed sowing treat-ments reduced plant height and centre of gravity,increased stem diameter,wall thickness and breaking-resist-ant strength of the second internode,and effectively improved the lodging resistance index of winter wheat,so the lodging risk of winter wheat could be reduced and the stress resistance and stable yield could be promoted.The conclusion could provide references for high-and stable-yield and lodging-resistant cultivation of winter wheat.
姜福腾;汲丽莎;骆永丽
山东农业大学农学院/小麦育种全国重点实验室,山东泰安 271018
农业科学
小麦间播等量混播茎秆形态特征抗折力抗倒伏指数
WheatIntercroppingMixed sowing with equal massStem morphological characteristicsBreaking-resistant strengthLodging resistance index
《山东农业科学》 2024 (009)
51-57 / 7
中国博士后科学基金面上项目(2022M711968);国家自然科学基金青年科学基金项目(32101834);山东省自然科学基金青年科学基金项目(ZR2020QC106)
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