The Study Of Replant Disease And Drought Resistance In Different Apple Dwarf Rootstocks

The dwarf anvil apple could make the tree body smaller,easy to manage,the new cultivation mode for planting dwarf rootstock wide,not only ripen in advance,high yield,and is convenient for mechanical operation,could greatly reduced the orchard labor,improved production efficiency,low anvil width row was the direction of development of our country apple.In this study,grafting Fuji champion Dwarf Rootstocks Re2,G11,G30,G41,G935,B9,G16,G210,T337,Pajam1,Pajam2,M26,Qing tai no.3,JM7,M9,Re1:54-118,Re3:71-3-130,Re4:60-160,Re5:71-3-150,Gx two years old potted seedlings as test materials,through replanted soil and drought treatment,the effect of replanted and drought for different dwarf rootstock growth and physiological function of Dwarf Rootstocks,type selection of anti cropping and drought resistance evaluation of strong.The main results were as follows:1.Under replanted stress,the growth and development of each rootstock panicle combinations were inhibited in different degrees.Compared with non replanted soil replanted soil treatment,G11,G41,M26,RE1:54-118 were decreased by 5.40%,0.41%,7.84% and 2.64%,the remaining stock decline ranging from 12.97%-34.18%,B9 and PAJAM2 of the largest decline;root dry weight decreased by 1.12%,5.43%,4.44%,4.33%;chlorophyll content and photosynthetic index.Compared with non replanted soil replanted soil treatment,chlorophyll content decreased by 1.34%,0.09%,1.57%,3.76%,the remaining decline ranged between 9.97%-19.25% rootstock respectively,net photosynthetic rate decreased by 1.12%,8.27%,9.43%,2.21%.Through the comprehensive analysis of the membership function of growth index,photosynthetic indexes,M26,G41,Re1:54-118,think G11 as resistant to G935,G30,replanted rootstock,GX and T337 were more resistant to replant rootstock,PAJAM2,B9,PAJAM1,M9 was not resistant to replant rootstock.2.Under drought stress,Re2,G11,G935,M26,Re1:54-118 and water content of leaves in the control group than in drought treatment decreased by 7.31%,8.59%,7.79%,7.44%,10.08%,the remaining stock scion decline ranging between 10.08%-23.55%,the relative water content change of G210 leaves the biggest difference,fell 23.55%,net photosynthetic rate decreased by 26.61%,17.23%,20.85%,23.39%,22.01%,29.63%,through the membership function,different rootstocks relative water content and index of photosynthetic.RE2,G11,G935,that Re1:54-118 and M26 combination of high resistant rootstock,Re3:71-3-130,PAJAM2,PAJAM1,M9,G41,T337 in resistant rootstock JM7,G210 and B9 are low resistant rootstock Re5:71-3-150,Re4:60-160,Qing tai no.3 for tolerance.