Research On The Evaluation And Selection Of Excellent Prove Nances Of Platyciadus Orientalis(L.) Franco

This article studied on the basis of Platyciadus orientalis(L.) Franco in Shandong Province. This study through arborvitae growth, cold tolerance, drought resistance analysis, based ,Shandong Shandong arborvitae species suitable source selection, and then for the provenance division.The main conclusions are as follows :1. Growth index of different provenances of P.orientalis and good provenance selection.(1). The differences of Inter-regional and Provenances are Significantly. Area around the point of difference between the groups was not significant, The Duncan test results that: Platyciadus orientalis in Zaozhuang are better than the overall growth of the original in Pingyin. The average diameter was 10.46cm, 9.35cm, 8.01cm, respectively. Site conditions of yuanshan and Pingyin are similar, but experimental forest orientalis Pingyin overall growth better than the original provenance in yuanshan.(2) .The Duncan and cluster analysis of Growth index from the three locations displaied: Shandong Tai'an, Shandong Feicheng,and Shandong Weishan are the best provenances, Shandong Pingyin, Shandong Qufu, and other parts of areas in Central and southern of Shandong, Most species of the provenances of Henan, Jiangsu, Xuzhou, Jiangsu Tongshan provenance is also relatively good in addition.2. Different provenances cold resistance of P. orientalisRegional test results from the provenance, eastern area including liaoning seems LingYuan, Beijing miyun, shandong various sources and fujian nanping provenance, hardiness performed well, cold from the original forest field survey (cold rate) results confirm that freeze resistance better provenance XuYi, shanxi provenance have jiangsu, in addition to the outside the county of henan yu in henan, hebei provenance, followed by shandong provenance provenance, and these provenance robability difference, including the overall situation of shandong ZaoZhuang provenance, takes the frost rate by 11.7%, jiangsu XuYi frost rate less than 10%. Provenance. Therefore, the comprehensive view, the original forest field frost-resistant better provenance of shanxi, jiangsu XuYi, for HuoXian, shandong ZaoZhuang provenance..3. Drought resistance of different provenances displaied:(1). Different kinds of source scale leaf anatomical structure. Orientalis cuticle developed, the ratio of palisade tissue and spongy tissue high on the morphology of different provenances of P. orientalis anatomical observations, to explore the strength of its drought resistance, through the subordinate function of the anatomy of a comprehensive evaluation index, the results show different side Park provenance order of drought resistance: Henan Queshan> Hebei huolu> Sichuan shehong> Taian> Shandong Pingyin> Huangling> Fujian Nanping> Shandong Changqing> Yunnan Wenshan> Shandong original Mountain> Liaoning Lingyuan> Xinjiang Ili> Shandong Yeongam> Gansu United Water> Beijing Miyun> Shanxi Changzhi> shandong Culai> Jingmen.(2).Target strength through photosynthesis, water saturation deficit, water conservation and other aspects of the branches of different sources for drought resistance of P. orientalis species of the size of evaluation, and ultimately selected a series of drought resistance in Shandong Tai'an strong provenance.4. Variation of Provenance orientalis from the point of law:Height, diameter, crown width and volume were significantly correlated, tree height, diameter, volume and longitude was not significant positive correlation, while the crown and the longitude was not significant negative correlation. Tree height, crown indicators and dimensions do not show a significant negative correlation, diameter, volume and dimensions were not significant negative correlation.Trend surface from three to five times, the geographical variation of P. orientalis Provenance generally show from the northwest, southwest direction of the evolution of East China, the geographical provenance Variation not as a trend surface equation presents a regular show gradual variation. East trend surface showing five provenances of tree height, Longitude 116°, latitude 36°for the good performance of both provenances performed better in Shandong area, north, southwest provenance poor.