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以蓝蓟为试材,采用裂区试验设计,以种植行距(30、60cm)为主区,株距(10、15、20、25、30cm)为裂区,研究了大田环境下不同种植密度对蓝蓟光合特性和产量的影响。结果表明:在行距30cm、株距25cm(T4)和行距60cm、株距20cm(S3)情况下,蓝蓟各光合特性指标数值相互接近;随着株距的增高,光合指标增长缓慢,随着冠层的增高,光合速率呈增长趋势,T4和S3二者群体叶面积指数相似,S3时叶面积指数(LAI)小高峰出现于鼓粒期(9月7日),晚于T4时的盛花期(7月27日);随着密度的增加,百粒重和单株籽粒数逐渐降低,产量总体逐渐减少(T5(行株距30、30cm)、S4(行株距60、25cm)、S5(行株距60、30cm)除外);T4和S3处理产量显著高于其它株距配置,表明高产最终取得的是群体产量的提高,而不仅是单株个体产量的增加,产量随种植密度增加到一定程度后不再增加,说明T4和S3是蓝蓟合理的栽培密度。
Taking the blue thistle as the test material, the experimental design of split zone was adopted. The planting distance (30, 60 cm) was the main area. The plant spacing (10, 15, 20, 25 and 30 cm) Effects of Photosynthesis and Yield of Blue Thistle. The results showed that the photosynthetic indexes of blue thistle were close to each other when the row spacing was 30 cm, the spacing was 25 cm (T4), the row spacing was 60 cm and the spacing was 20 cm (S3). The photosynthetic indexes increased slowly with the increase of spacing, The leaf area index of both T4 and S3 was similar. The small peak of leaf area index (LAI) appeared at the stage of druing stage (September 7) and later than the full flowering stage at T4 (7 (T5), S4 (60 and 25 cm), S5 (60 and 60 lines), with the increase of density, the grain weight per plant and the grain number per plant decreased gradually, , 30cm). The yield of T4 and S3 treatments was significantly higher than that of other strains, indicating that the high yield finally achieved is the increase of population yield, not only the individual yield of individual plants, but the output did not increase with the planting density increased to a certain extent Increase, indicating T4 and S3 is a rational cultivation of blue thistle density.