播期和密度对云南冬播燕麦主要经济性状及产量的影响

为探知云南冬燕麦的适宜播期和种植密度,以白燕15号、坝莜6号和远杂2号3个不同生育期的燕麦品种为材料,采用单因素随机区组设计,研究了3个播期和3个种植密度对云南冬播燕麦主要经济性状和产量的影响。结果表明：播期对白燕15号和坝莜6号两品种的主穗小穗数、穗轮层数影响显著(p﹤0.05),对3个供试材料其余的经济性状影响不显著(p﹥0.05)；密度对3个供试材料的单株分蘖数和单株有效分蘖数影响显著(p﹤0.05),对其余的经济性状影响不显著(p﹥0.05)。产量结果显示：白燕15号适宜播期为10月29日,密度为64万株.hm-2；坝莜6号适宜播期为10月14日,密度为64万株.hm-2；远杂2号宜适宜播期为10月14日,密度为48万株.hm-2。

Sowing Date and Planting Density Affect Main Economic Traits and Yield of Winter Oat in Yunnan

To find out the suitable sowing date and planting density for winter oats in Yunnan, 3 oat cultivars of ‘Baiyan No.15’,‘Bayou No.6’and‘Yuanza No.2’with different growth periods were used as experimental materials. The single factor randomized block design was used to study the effects of 3 types of sowing dates and planting densities on the main economic traits and yield of winter oat. The results showed that the main spike spikelet number and the spike wheel layer of‘Baiyan No.15’and‘Bayou No.6’were significantly influenced by the sowing date (P＜0.05) ; however, there was no significant influence on the other economic traits of the 3 cultivars (P＞0.05). The tiller number per plant and the effective tiller number per plant were significantly influenced by the density (P＜0.05) and the influence on other traits was not obvious (P＞0.05). According to the yield result, the optimized treatments are as follows: the suitable sowing date of‘Baiyan No.15’ is on October 29th, with the density of 6.4×105 lants/hm2; the suitable sowing date of‘Bayou No.6’is on October 14th, with the density of 6.4×105 plants/hm2; the suitable sowing date of‘Yuanza No.2’is on October 14th, with the density of 4.8×105 plants/hm2.