以9个民勤地方茴香品种为试验材料，研究了不同种植密度对不同茴香品种株高、茎粗、分枝数、结实花序数、千粒重和产量的影响，确定不同民勤地方茴香品种的最佳密度。结果表明，大粒高秆晚熟茴香和割茬茴香的最适种植密度均为13.35万株/hm2，产量分别为3 819.05、3 990.48 kg/hm2；东润大粒高秆晚熟茴香、大粒高秆早熟茴香、小粒高秆晚熟茴香和小粒高秆早熟茴香的最适种植密度均为14.85万株/hm2，产量分别为 4 361.90、5 238.10、4 695.24、3 980.95 kg/hm2；酒泉小粒高秆早熟茴香、东湖大粒高秆早熟茴香和大粒矮秆早熟茴香的最适种植密度为16.50万株/hm2，产量分别为5 228.57、4 180.95、4 352.38 kg/hm2。

Nine local fennel (Foeniculum vulgare) varieties from Minqin county were used as the materials to study the effect different planting densities on plant height, stem diameter, number of branching, fruiting inflorescence number, 1 000-seed weight and yield of different fennel varieties to determine the optimum planting densities for different local fennel varieties of Minqin. Results showed that planting density of 133 500.00 seedling/ha for big grain, high-stem, late-ripening fennel and cutting fennel was optimum which achieved fennel yields of 3 819.05 and 3 990.48 kg/ha, respectively. The optimum planting density for Dongrun big grain, high-stem, late-ripening fennel, big grain, high-stem, early-ripening fennel, small grain, high-stem, late-ripening fennel, and small grain, high-stem, early-ripening fennel was 148 500.00 seedling/ha which achieved fennel yields of 4 361.90, 5 238.10, 4 695.24, and 3 980.95 kg/ha, respectively. The optimum planting density for Jiuquan small grain, high-stem, early-ripening fennel, Donghu big grain, high-stem, early-ripening fennel, and big grain, dwarf stem, early-ripening fennel was 165 000.00 seedling/ha which achieved fennel yields of 5 228.57, 4 180.95, and 4 352.38 kg/ha, respectively.

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