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| 不同播种方式和密度对荞麦倒伏特性及产量的影响 |
| Effects of Different Sowing Methods and Densities on Lodging Characteristics and Yield of Buckwheat |
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| DOI： |
| 中文关键词: 播种方式 播种密度 倒伏率 抗折力 |
| 英文关键词:Sowing method Seeding density Lodging rate Bending resistance |
| 基金项目:陕西省农业协同创新与推广联盟2021年示范推广项目-荞麦抗倒伏技术示范推广（LM202111）。 |
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| 中文摘要: |
| 为研究不同播种方式和密度对荞麦倒伏特性及产量的影响，助力延安地区荞麦产业发展。研究采用双因素随机区组设计、3种播种方式（条播、穴播、撒播）和3种播种密度（45万株/hm2、60万株/hm2、75万株/hm2），对荞麦农艺性状、经济性状、节间性状、倒伏率、第三节间抗折力等指标进行了分析。结果表明：在条播种植方式下，播种密度为75万株/hm2时，产量达到所有处理中最高；在撒播种植方式下，75万株/hm2播种密度比45万株/hm2的产量高；穴播种植方式下3种密度处理的小区产量间差异不显著。荞麦的第三节间抗折力、第一节间长度、第二节间长度、第二节茎粗与倒伏率呈负相关关系；株高、第三节间长度、第一节茎粗、第三节茎粗与倒伏率表现出正相关关系。总的来说，在实际生产中,可选择第三节间抗折力强、株高低等性状的荞麦品种,或使用植物生长素抑制荞麦株高,减缓荞麦倒伏现象的发生;在延安或外界环境相似地区，可通过条播种植75万株/hm2密度的方式促进荞麦高产。 |
| 英文摘要: |
| To study the effects of different sowing methods and densities on the lodging characteristics and yield of buckwheat and to promote the development of the buckwheat industry in the Yan'an area, a two-factor randomized block design was used, with three sowing methods (drill sowing, hill sowing, and broadcast sowing) and three sowing densities (450 000 plants/hm2, 600 000 plants/hm2, and 750 000 plants/hm2). A series of indicators were measured, including agronomic traits, economic traits, internode traits, lodging rate, and the bending resistance of the third internode. The results showed that the yield was the highest among all treatments when drill sowing was adopted at a seeding density of 750 000 plants/hm2. Under broadcast sowing, the yield was higher at a density of 750 000 plants/hm2 than at 450 000 plants/hm2. There was no significant difference in yield among the three density treatments under hill sowing in the plots. The bending resistance of the third internode, length of the first internode, length of the second internode, and outer diameter of the second internode were negatively correlated with lodging rate, whereas plant height, length of the third internode, outer diameter of the first internode, and outer diameter of the third internode were positively correlated with lodging rate. In general, in practical production, buckwheat varieties with strong bending resistance of the third internode and low plant height can be selected. Alternatively, plant growth regulators can be applied to inhibit plant height and reduce lodging. In Yan'an or regions with similar conditions, high yield can be achieved through drill sowing at a density of 750 000 plants/hm2. |
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