Studies On The Introduction And Cultivation And Disease-Insect Pest Control Of Paeonia Rockii

The tree peony is one of top ten famous flowers of China because it is very beautiful and flowery. The peony was praised as the king of flowerage. It is a symbol of rich and honour. The peony is endemic species and has been cultivated long time ago in our country. Zhongyuan peony viz. Heze peony of Shandong and Luoyang peony of Henan are the best varieties of the species. Ningxia Province is situated in Northwest China, circumstance badly. Introduction of Zhongyuan peony was unsuccessful in a long time. There is no large-scale cultivation of the peony. Zhongyuan peony that early cultivated in Zhongshan Garden of Yinchuan were died, because of different reasons.The tree peony of purple spot belongs to the genus Paeonia, Ranunculaceae. It was classified national protected plant of China as the third class in 1987. It has high ornamental value with its unique large purple spot on the base of petal. The root peel is high medical value of root bark of tree peony, it has fine characters such as drought resistance, cold hardiness, diseases resistance and barren resistance. It is the extremely valuable resources of wild kind that a breeding of tree peony of our country.After originally testing and understanding and grasping the environmental condition that the tree peony of purple spot is suitable for growing, compare climatic conditions of Lanzhou of Gansu with climatic conditions looks of the plain of Yinchuan of Ningxia, especially compare the ecological conditions of original place, we thought it was feasible to introduce a fine variety purple spot tree peony to Yinchuan irrigated area.This research aims were to cultivate to purple spot tree peony with exotic species, to observe it growing characters and ecological habits and acquired characters, to improve light, warm, water and fertiles, to creat most suitable habitating sourounding to promote its growing, etc..The result showed that when introducing different perennial plant of climatic zone, we should pay attention to country of origin and introduce a fine variety regional ecological contrast of terms especially, to grasp the correct objective law of plants and environmental relation is keys to introduce and acclimatize success or failure. In order to reduce the blindness while introducing, we should pay attention to the country of origin and ecologicalenvironment of introducing a fine variety between the areas, especially climate factor is similar, drawn by comparative analysis: Two places have obvious difference on average annual precipitation, other all meteorological factor, the ecological condition is similar. Its introduction and acclimatization is apt to succeed.By observing thing wait issue change and comparing with Lanzhou, Gansu, the place of origin, comprehensive things of purple spot of tree peony in Qingtongxia qingxiuyuan showed that sprouting, blooming, fallen synthetically. Purple spot tree peony bud of introducing place sprout in mid-March;the blooming Concentrate from the last ten days of April to the first ten days of May;Fallen leaves was from the last ten days in October to the first ten days of November. The difference between the situation and biological characters that every variety grows lead to the difference of the thing waited and behaved. The result shows: pink lotus sprouted earliest, the latest one is the snow lotus, it is about 8 days in interval, others are same, pink lotus earlier, the purple jade later in florescence. Yellow lotus is the earliest fallen leaf one, blue lotus latest, the two differ by 22 days;Purple spot tree peony that introduce a fine variety compare with country of origin haven't difference on growth period from sprouting to blooming. The Yellow lotus 's growth period was shorter in 5 varieties.After the tree peony of purple spot was cultivated with exotic species, the comprehensive behavior of growth, such as the growth of the plant, shape characters, etc. was same with the country of origin as display, but in the rate of becoming flower, the ability of upgrading branch, shape, corolla piece, spot color, section interval and grow tendency are differences. Their synthesis in these respects was shown as: the rate of becoming flower drop, the ability of upgrading branch to be weak, heavy petals or semi-heavy petals of variety turn into single one, corolla was smaller than that of the place of origin, the color was less pure than the original ones. The black and purple spot on the base department petal to be lighter slightly, the interval was shortened, the tendency grows well in rainy season, relatively bad in dry season. Of the every variety, blue lotus had the highest rate of becoming flower;the lowest one was the purple jade. The biggest Corolla piece was Yellow lotus, the minimum one was the snow lotus, it was not different that the growth potential difference of every variety, but the corolla one drops to some extent.Pests on purple spot were seldom found in Lanzhou. Pests of the introduced species were also few in Ningxia plain. The main diseases and insects were hot suffering, the green house whitefly Trialeurodes vaporariorum, Liromyza spp. Diseases and insects not merely influence the ornamental value of the tree peony greatly, and endanger the growth of the diseased plant seriously. To control diseases and insects of tree peony, we should insist on the policy that" prevention in the first place and integrating prevention with control", the disease resistance of new variety must be strengthen, plant rationally, strengthen the management of maintaining, improve the ability of resisting of the plant oneself, carry on integrated control.