不同树形对紫斑牡丹枝条生长和籽粒产量的影响

Effects of Different Tree Form on Branch Growth and Seed Yield of Paeonia rockii

为了提高紫斑牡丹籽粒产量和观赏性,研究了不同修剪树形——圆球形、平顶形和纺锤形对枝条生长、籽粒产量和景观效果的影响。结果表明:不同修剪树形均提高了籽粒产量和景观效果,但圆球形树形效果最佳,修剪后新枝数、新枝粗度、开花数、荚果数和籽粒产量分别为44.92个/株、7.82mm、35.49朵/株、97.45个/株和563.52g/株,较对照自然形(CK)提高了238.51%、54.24%、218.01%、277.71%和48.11%;新枝长度为26.42cm,较对照自然形(CK)降低了57.12%,差异均达到极显著水平(P<0.01)。且圆球形树形表现出行间施肥、除草和采收方便,景观效果整齐优美,可将圆球形树形作为乡村紫斑牡丹园增产和提高观赏性的修剪树形。

The effects of different tree forms ball form,flattop form and shuttle form on branch growth,seed yield and landscape effect of Paeonia rockii were studied to increase seed yield and landscape effect. The result showed that the seed yield and landscape effect of different pruning forms were increased,and the effects of ball form was the best in all tree forms,the shoot number,shoot diameter,flower number,pod number and seed yield of ball form were 44.92/plant,7.82mm,35.49/plant,97.45/plant and 563.52g/plant separately,which were increased 238.51% ,54.24% ,218.01% ,277.71% and 48.11% compare to CK;the shoot length of ball form was 26.42cm, which was decreased 57.12% compare to CK,the difference reached extremely significant level（P 〈 0.01）. Fertil- izing,weeding and picking work of ball form were convenient,the landscape effect was orderly,and the ball form was suggested to be pruning form to increase seed yield and landscape effect of Paeonia rockii in countryside.