不同种植密度对迷你花型切花菊生长发育和品质的影响OA

[Objectives]The paper aimed to explore suitable planting management conditions,improve land utilization and increase income,and ultimately achieve high-quality production of mini-cut chrysanthemum and the promotion of this variety.[Methods]This study investigated the effects of four planting densities:80 plants·m-2(CK),100 plants·m-2(D1),123 plants·m-2(D2),and 156 plants·m-2(D3)on quality of mini-cut chrysanthemum variety'Xinghezi'across two production batches with light and temperature variations(S1 and S2)in Yunnan Province.The indexes of plant height,stem diameter,fresh weight,leaf number,leaf area,branch number,branch angle,flower bud number,flower diameter and vase life at different growth stages were measured.The comprehensive evaluation used the analytic hierarchy process(AHP).[Results]The stem diameter,fresh weight,bud number,leaf number and leaf area of mini-cut chrysanthemum'Xinghezi'increased first and then decreased with the increase of planting density,with the highest in D1 treatment and the lowest in D3 treatment.Fresh weight and bud number in D1 treatment were significantly higher than CK and other treatments,while stem diameter,leaf number,and leaf area showed no significant differences compared to CK.Plant height,branch number,branch angle,and flower diameter of mini-cut chrysanthemum were the highest in CK and declined with the increase of planting density.Plant height showed no significant differences between treatments and CK.Branch number and flower diameter in D1 treatment were comparable to CK and D2 treatment but significantly higher than D3 treatment.Branch angle in D1 treatment was similar to CK but significantly larger than D2 and D3 treatments.Vase life and leaf quality remained consistent across all treatments.AHP analysis revealed that comprehensive score followed a rise-then-decline trend with the increase of planting density,with D1 treatment achieving the highest score(2.303),followed by CK,and D3 treatment scoring the lowest(1.526).The average daily temperature of S1 was lower than that of S2,while the light conditions of S1 were better,and the cumulative photosynthetically active radiation was also higher.There were differences in the quality of mini-cut chrysanthemum between two batches of different density treatments.The comprehensive score of CK during S1 was lower,while the other treatment groups with higher planting density were higher than S2.[Conclusions]The optimal planting density range for'Xinghezi'was 80-123 plants·m-2,with 100 plants·m-2 providing the best balance of yield and quality.High temperatures significantly impair quality in high-density cultivation.In Yunnan region,lower densities(80-100 plants·m-2)were recommended during hot summers,while 123 plants·m-2 might be adopted under moderate temperatures.