不同锌浓度浸种和种植密度对苦荞生物学性状及产量的影响

Effect of Different Zinc Concentration and Density on Biological Characteristics and Yield of Tartary Buckwheat

目的：探索苦荞种植密度和锌浸种浓度的最佳组合,为优化栽培技术与提高苦荞产量提供理论参考。方法：以西荞二号为材料,通过完全随机区组设计,研究不同种植密度和硫酸锌浓度对苦荞生物学性状及产量的影响,试验数据使用Exc le软件进行统计和方差分析（SSR法）。结果：（1）株高和叶片数随密度的增加而增加,一级分枝数随密度的增加而减少,叶面积在120万~180万株/hm2范围内,随密度的增加而增大,超过此范围则减小;当锌浓度在0~0.4%范围时,苦荞株高、叶片数、叶面积、一级分枝数以及产量随浓度的增加而增加,随锌浓度继续增大而呈下降趋势。（2）不同密度和浓度对西荞二号的产量有极显著影响。产量随密度的增加呈低-高-低变化趋势,当密度大于180万株/hm2时产量下降;产量随浓度的增加也呈低-高-低变化趋势,当浓度大于0.4%时产量下降。结论：各组合处理对苦荞生长性状和产量均具有影响,从苦荞长势和产量角度考虑,西荞二号的最佳处理组合为密度180万株/hm2,锌浸种浓度0.4%。

[Objective] To explore the best combination of tartary buckwheat which plant density and zinc soaking concentration,and provide a theoretical reference.to optimize cultivation techniques and improve yield.[Method] XiQiao II as the studied material,to study the effect of different Zinc concentration and density of buckwheat on the biological characteristics and yield through randomized complete block design.Experimental data were analysed by the software Excle statistics and analysis of variance（SSR method）.[Results]（1）Plant height and leaf number increased with the density increasing.The primary branch number decreased with the increase of the density.Leaf area increased with the density at 1.2-1.8 million/hm2 range,and then reduced.When the zinc concentration in the range of 0 to 0.4%,tartary buckwheat plant height,leaf number,leaf area,primary branch number and yield increased with the concentration,and showed downward trend with zinc concentrations continue to increase.（2） Different density and concentration had significant effect on production of Xiqiao II.The change of yield and density showed low-high-low trend,and production decreased when the density was greater than 1.8 million/hm2.The change of yield and concentration showed low-high-low trend,and yield declined when the concentration was 0.4%.[Conclusion] The combination treatment both affected the biological characteristics and yield of tartary buckwheat,according to tartary buckwheat growing and production perspective,the best combination of west buckwheat II was density 1.8 million/hm2,zinc soaking concentration 0.4%.