以辣椒品种天椒12号、天椒14号为试材，观察了不同种植密度对辣椒生育期、农艺性状及产量的影响。结果表明，当种植密度较小(80 000～116 000株/hm2)时，种植密度对辣椒生育期与农艺性状影响不大；当种植密度较大(116 000～140 000株/hm2)时，株高与果实畸形率随着种植密度的增大而显著增大，株幅、有效分枝数与单果重则随着种植密度的增大而显著减小。辣椒折合产量随着密度的增加先升高后降低，呈抛物线变化。天椒12号辣椒折合产量以密度为104 000株/hm2时最高，为92 045.4 kg/hm2； 密度为116 000株/hm2折合产量较高，为91 666.7 kg/hm2。天椒14号辣椒折合产量以密度为116 000株/hm2时最高，为 86 931.8 kg/hm2； 密度为104 000株/hm2折合产量较高，为85 984.8 kg/hm2。综合考虑，建议在天水市辣椒生产上天椒12号种植密度以110 700株/hm2左右为宜，天椒14号辣椒种植密度以112 100株/hm2左右为宜。

Take Pepper Cultivars Tianjiao 12 and Tianjiao 14 as the material， the effects of different planting densities on growth period， agronomic traits and yield of pepper cultivars were observed. The results showed that when the planting density is small(80 000-116 000 plant/hm2)， planting density has little effect on the growth period and agronomic characteristics of pepper；When planting density is large(116 000-140 000 plant/hm2)， with the increase of planting density， plant height and commodity fruit deformity rate were increased significantly，the plant width， effective number of branches and single fruit weight were decreased significantly. With the increase of planting density yield of pepper showed a curve of first increase and later drop. The yield of Tianjiao12 was the highest when its density was 104 000 plants/hm2， which was 92 045.4 kg/hm2； the yield of Tianjiao12 was higher when its density was 11 600 plants/hm2， which was 91 666.7 kg/hm2. The yield of Tianjiao14 was the highest when its density was 11 600 plants/hm2， which was 86 931.8 kg/hm2. The yield of density 104 000 plants/hm2 was higher， which was 85 984.8 kg/hm2. Considering comprehensively， it is suggested that the planting density of Tianjiao12 in Tianshui should be about 110 700 plants/hm2， and that of Tianjiao14 should be about 112 100 plants/hm2.

S641.3

甘肃省农业科学院科研条件建设及成果转化项目(2017GAAS51)、天水市科技支撑计划项目(2018-NCK-7227)、天水市科技支撑计划项目(2018-NCK-6711)。