Comparative Research Of Different Varieties Of Ornamental Peach Growth Characteristicss

Prunus persica (L.) Batsch for its matched many flourish and other characteristics, becoming one of the main ornamental trees, especially the leader in early spring.In this study, different types (species) 3-year-old ornamental peach for the study,20 varieties ornamental peach launched phenology observations, comparative studies measuring the growth index and photosynthetic parameters, the use of curve fitting, linear regression, least-significant difference, hierarchical clustering and correlation analysis to identify differences between the different types (species) of the 3-year-old peach ornamental characteristics and growth habits and the use of the various aspects of a comprehensive evaluation index, trying to find out watch peach growth and development of the objective laws of the state of the strong growth of selected ornamental peach varieties used in production, improve and expand production levels ornamental peach, rich resources of local ornamental peach varieties, ornamental peach cultivation measures to improve and strengthen scientific management, improve plant quality and provide a theoretical basis and provide strong technical support for the cultivation and management, as well as to provide reference for ornamental peach application, to achieve sustainable development ornamental peach industry.The main findings are as follows:(1) Tested 20 kinds of ornamental peach leaf budding concentrated in mid-March, pumping leaf stage concentrated in mid-March, leaf expansion concentrated in mid-April to late deciduous period of November; shoot growth concentrated in early April mid; budding flowers concentrated in late February, exposed red period of March to mid-on, before flowering in late March, late flowering in late March to early April, the best view is not more than 20 days; fruit concentrated maturity in early May to late June. According to the 20 kinds of ornamental flowering peach can be divided into:early flowering species (’Hehuanerse’,’Fenhongshanbitao’,’Fenhuashanbitao’), late flowering varieties (’Feitao’, ’White Peachy’,’Erqiao’), general varieties (’Yuanchun’,’Kikumomo’,’Camelliaeflora’, ’Mantianhong’,’Teruteshiro’,’Terutehime’,’Terutemomo’,’Sahonglongzhu’,’Yuanyang chuizhi’,’Zhufenchuizhi’,’Daiyuchuizhi’,’Shoubai’,’Shouhong’,’Shoufen’).20 kinds of ornamental peach,’Erqiao’is flowering longest 19 days, and the shortest flowering peach ’Kikumomo’ for seven days.(2) 20 species of ornamental peach varieties were observed and statistics, the use of R-type clustering method, multiple correlation analysis screened affect the growth of ornamental peach comprehensive characters larger 11 indicators, leaf width, shoot diameter, chlorophyll content,the first branching angle, crown length from north to south, the second branching number, the first branching number, proportion of withered bud, the the thunk height,shoots total length,the blossom bud and leaf bud number were selected to make comprehensive evaluation of the growing characteristics by subordinate function values analysis,20 kinds of ornamental peach growing strength roughly divided into:ornamental peach growing stronger (’Mantianhong’,’YHehuanerse’,’Yuanchun’,’Camelliaeflora’), strong growth (’Kikumomo’,’Sahonglongzhu’),the growth medium (’Feitao’,’Teruteshiro’, " Terutemomo’," Yuany angchuizhi’,’Zhufenchuizhi’,’Daiy uchuizhi’,’Shoubai’,’Fenhongsha nbitao’,’Fenhuashanbitao’),weak growth(’White Peachy’,’Erqiao’,’Terutehime’,’Shou hong’,’Shoufen’).(3) 20 kinds of ornamental peach photosynthesis comparison:ornamental peach apparent quantum yield in the range of 0.04 to 0.08,’Sahonglongzhu’and Terutemomo’ were highest apparent quantum yield, indicating its highest energy efficiency, and the biggest advantage of the ability of low light;’Yuanyangchuizhi’,’Erqiao’, ’Fenhuashanbitao’and’Daiyuchuizhi’were lowest apparent quantum yield, indicating that the minimum light utilization efficiency and low light with a small capacity. The maximum net photosynthetic rate for ornamental peach was between 4.06 μmol/m2·s and 14.65 μmol/m2·s,’Yuanchun’was the maximum net photosynthetic rate,the largest of its leaves absorb CO2 conversion ability of O2, strong photosynthetic capacity;’Shoufen’was the smallest maximum net photosynthetic rate, photosynthetic capacity was weak. Ornamental peach light saturation point in the 922.70 μmol/n2·s～2062.45 μmol/m2·s; ornamental peach light compensation point of between 20.91 μmol/m2·s and 53.70 μmol/m2·s. The light saturation point and light compensation point’Yuanchun’ and ’Yuanyangchuizhi’ were higher, indicating its high adaptability to light,the light saturation point and light compensation point of’Terutemomo’ and ’Sahonglongzhu’, indicating that the higher its ability to adapt to low light.’Camelliaeflora’s pecific leaf weight was 967 mg/dm2, is greater than others, indicating strong ability to convert and accumulation of nutrients, and ’Terutemomo’specific leaf weight was 540 mg/dm2,was small than others, the ability to explain the transformation and accumulation of nutrients weak; ’Camelliaeflora’ chlorophyll content was 3.62 mg/g, more than others, indicating that the light energy absorption and conversion ability, and’Shouhong’chlorophyll content was 1.28 mg/g, less than others, indicating its strong absorption and conversion of light energy capacity.(4) Gummosis disease of ornamental peach saplings is more serious, ornamental peach varieties are affected each of gummosis disease in varying degrees. Tested 20 kinds of ornamental peach incidence of gummosis disease in 15% to 80%, the disease index in the range between 10.00 and 80.00. It can be divided into three classes by gummosis disease, Class 1 for gummosis disease incidence and disease resistance strong varieties: ’Shouhong’,’Shoufen’,’Shouhong’’Camelliaeflora’,’Mantianhong’,’Hehuanerse’, ’Fenhongshanbitao’,’Teruteshiro’,’Terutemomo’,’Terutehime’,’Fenhuashanbitao’, ’Daiyuchuizhi’,’Zhufenchuizhi’,’Daiyuchuizhi’; class 2 for gummosis disease incidence and disease resistance weak varieties,’Yuanchun’,’Erqiao’; class 3 for gummosis disease incidence is low and strong disease resistance varieties,’White Peachy’i,’Sahong longzhu’,’Feitao’ and ’Kikumomo’.