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作者	单位
冯学颖,米俊珍，刘景辉 ,赵宝平，王英，田露，陈晓晶，王欣欣	（1.内蒙古农业大学/内蒙古农业大学杂粮产业协同创新中心，内蒙古呼和浩特 010019 2.赤峰农牧科学研究院，内蒙古赤峰 024031）

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中文摘要:

为明确宽幅条播对燕麦抗倒伏性和产量的调节作用及其适宜种植密度，于2019-2020年，通过裂区试验，设置2种播种方式（宽幅条播和常规条播）和三个种植密度水平［300×10株·hm^-2（D1）、450×10株·hm^-2（D2）、600×10株·hm^-2（D3）］，分析了播种方式与种植密度对燕麦植株抗倒伏性和籽粒产量的影响。结果表明，同一种植密度下，宽幅条播的燕麦茎秆机械强度、茎粗、壁厚均显著高于常规条播。在籽粒灌浆期，与常规条播相比，宽幅条播的燕麦基部第二节间机械强度在 D1、D2、D3下分别提高9.3%、11.6%和17.0%，茎粗分别增加7.3%、7.6%和7.3%，株高分别降低2.3%、1.9%和3.0%，重心高度分别下降 6.5%、7.8%和 6.0%。相比于常规条播，燕麦宽幅条播主要通过增加穗数来增产。在D1、D2、D3下，宽幅条播的两年平均产量较常规条播分别增加了8.6%、9.3%和14.5%。随着种植密度的增加，两种播种方式下燕麦茎秆机械强度、茎粗、壁厚均呈减小趋势，株高、重心高度、节间长均呈增加趋势，但宽幅条播的各指标变化幅度均小于常规条播。因此，生产中采用宽幅条播可显著提高燕麦茎秆抗倒伏能力和籽粒产量，适当增加种植密度，可实现燕麦抗倒性与产量协同提高；本试验条件下，宽幅条播燕麦达到最高产的密度为600×10 株·hm^-2。

英文摘要:

In order to explore the regulating effect of wide range drilling on lodging resistance and yield of oat,wide range drilling and conventional drilling were set up in 2019-2020,with three planting densities including 300×10 plants·hm^-2(D1),450×10 plants·hm^-2(D2),and 600×10 plants·hm^-2(D3). The effects of planting methods and planting density on oat lodging resistance and grain yield were studied. The results showed that the mechanical strength,stem thickness and wall thickness of stalk under wide range drilling were significantly higher than those under conventional drilling,while the plant height,center of gravity height and internode length were lower than those under conventional drilling. At grain filling stage,compared with conventional drilling,mechanical strength of the second basal internode of wide drilling oat was increased by 9.3%,11.6% and 17.0%; stem diameter was increased by 7.3%, 7.6%and 7.3%; plant height was decreased by 2.3%,1.9% and 3.0%; and gravity center height was decreased by 6.5%,7.8% and 6.0%,respectively. Compared with conventional drilling,oat wide range drilling increased yield mainly by increasing panicles. Under D1,D2 and D3,the two-year average yield of wide range drilling was increased by 8.6%,9.3% and 14.5%,respectively. With the increase of planting density,the mechanical strength,stem diameter and wall thickness of oat stem were decreased,and the plant height,center of gravity height and internode length were increased,but the chenges under wide range drilling were less than those under conventional drilling. Therefore,the lodging resistance and grain yield of oat can be significantly improved by wide strip sowing in production,and the synergistic increase of lodging resistance and grain yield can be achieved by appropriately increasing planting density; under the experimental conditions,the highest yield density of oat by wide range drilling is 600×10 plants·hm^-2.

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