营养枝数量对月季冠层和生物量的影响OA

Vegetative branches promote rose growth by increasing the photosynthetic area,allowing more nutrients to accumulate and transport to commercial flower branches.To investigate the effects of the number of vegetative bran-ches on the canopy and biomass of roses,a randomized complete block design was adopted to quantify the relation-ship between the number of vegetative branches and the accumulation of biomass in commercial flower branches.The plant height,dry weight,photosynthetically active radiation(PAR)of commercial flower branches and vegetative branches of cut roses were measured under 1-3 vegetative branches treatments.The results showed that the plant height of commercial flower branches treated with three vegetative branches significantly(p＜0.05)increased by 87.83％and 45.79％compared with those treated with one or two vegetative branches.The total dry weight of com-mercial flower branches treated with three vegetative branches significantly increased by 134.69％and 52.40％com-pared with those treated with one or two vegetative branches.Under the treatment of three vegetative branches,the average PAR utilization rate of vegetative branches was the highest,at 30.46 g·MJ-1,which was 84.16％higher than the treatment of two vegetative branches and 219.29％higher than the treatment of one vegetative branch.Ac-cording to the grading evaluation of fresh cut roses,the total number of commercial flower branches under the treat-ment of three vegetative branches was 54,of which 4 were A-grade,accounting for 57.14％of the total number of A-grade commercial flower branches.There were 10 B-grade branches,accounting for 52.63％of the total number of B-grade commercial flower branches.Under the treatment of three vegetative branches,the commercial flower bran-ches had the highest plant height,total dry weight,PAR utilization rate,and cut flower grade,indicating that vege-tative branches have a positive effect on the growth and biomass accumulation of commercial flower branches.