四个糜子主栽品种在甘肃会宁的适宜播期分析

在甘肃会宁,选用陇糜10号（B1）、陇糜11号（B2）、晋黍9号（B3）、龙黍21号（B4）等4个糜子品种,设4月23日（A1）、5月4日（A2）、5月12日（A3）、5月24日（A4）、6月3日（A5）等5个播期,采用裂区设计,研究了不同播期对糜子不同品种农艺性状及产量的影响。试验结果表明,品种B1的株高、主穗长、主茎粗、单株穗重、单株草重等指标均在A2播期表现最高;B2的株高、千粒重等指标均在A1播期表现最高,主茎粗、单株穗重、单株草重等指标均在A2播期表现最高;B3的株高、主茎粗、单株草重等指标均在A2播期表现最高,单株穗重、千粒重等指标均在A3播期表现最高;B4的主穗长、主茎粗、单株穗重、单株草重、千粒重等指标均在A4播期表现最高;品种B1、B2、B3、B4分别在A2、A1、A3、A4播期的产量最高,为3 413.31、3 603.47、2 883.11、2 733.03kg/hm ²。综合播期对不同糜子品种农艺性状及产量的影响,在会宁糜子产区及相似生态区,品种陇糜10号（B1）适宜的播期是5月4日左右;陇糜11号（B2）适宜的播期是4月23-28日;晋黍9号（B3）适宜的播期是5月7-12日;龙黍21号（B4）适宜的播期是5月24日左右。

Analysis on Suitable Sowing Date of Four Main Cultivars of Broomcorn Millet in Huining,Gansu

In Gansu Huining, 4 broomcorn millet varieties, such as Longmi 10 (B1), Longmi 11 (B2), Jinshu 9 (B3) and Longshu 21 (B4), were selected for 5 sowing stages of April 23rd (A1), May 4th (A2), May 12th (A3), May 24th (A4) and June 3rd (A5), and the different sowing stages were studied. The experiment was a split plot design to study the effects of different sowing stages on broomcorn millet varieties based on agronomic traits and yield. The results showed that the indexes of plant height, main panicle length, main stem diameter, spike weight per plant and straw weight per plant of B1 were the highest in the A2 sowing stage. The indexes of plant height and 1000-grain weight of B2 were the highest in the A1 sowing stage, and the indexes of main stem diameter, spike weight per plant and straw weight per plant were the highest in the A2 sowing stage. The indexes of plant height, main stem diameter and straw weight per plant of B3 were all higher in the A2 sowing stage and its spike weight per plant and 1000-grain weight were the highest in the A3 sowing stage. The indexes of main panicle length, main stem diameter, spike weight per pant, straw weight per plant and 1000-grain weight of B4 were the highest in the A4 sowing stage. The yields of B1, B2, B3 and B4 were highest in A2, A1, A3, A4 sowing stage, respectively. In conclusion the suitable sowing stage of Longmi 10 (B1) was around May 4th, and the suitable sowing stage of Longmi 11 (B2) was from April 23rd to April 28th; the suitable sowing stage of Jinshu 9 (B3) was from May 7th to May 12th (A3); and the suitable sowing stage for Longshu 21 (B4) was around May 24th.