The Suitability Analysis Of Chinese Jujube Cultivar ‘Qiyuexian' In Xinjiang

Xinjiang has more than 2,000 years of history of cultivation of red dates,mainly introduced from the mainland-based,and has formed some native tree species.Xinjiang red dates producing areas of light and heat resources,flat,suitable for mechanized farming.So far,Xinjiang jujube industry has a very large scale(about 700 million mu),but there are some problems.Xinjiang jujube black spot disease serious,leading varieties to Jun jujube and Hui jujube-based,single species."Qiyuexian" as a new type of seed,has been successfully introduced in Xinjiang and cultivated for 10 years,and a certain scale,but not yet its adaptive and suitable area analysis and evaluation.In this study," Qiyuexian " was used as the material,and compared with the two main cultivars in Xinjiang,and the comparison was made in the four areas of Aksu,Hotan and Kashi,Xinjiang,including climatic conditions,phenological period and resistance Disease(black spot)comparison.The main results are as follows:(1)the average annual temperature,growth season ? 10 ?accumulated temperature,6-10 month sunshine hours and other indicators,Hetian higher than Kashi and Aksu;mature precipitation Tada minimum,Kashi highest.Based on the analysis of natural conditions,the Hotan area is the best suitable area for the jujube in the three regions.(2)phenological survey found that the phenology between different regions,Hetian and Kashi's phenological period than the Aksu early 7d.The phenological period,leaf stage,flowering period,fruit ripening period and leaf color change period of " Qiyuexian " were 15 days earlier than that of Jun jujube and Hui jujube.(3)Through the investigation and analysis of the data,it was found that the incidence of jujube black spot was positively correlated with the rainfall.Through 20 years of rainfall analysis,the rainfall in the Hotan area was the least,so the Hetian area should be low Hair area.In the 2016 high rainfall of extreme weather conditions,different regions,Hotan and Kashi jujube black spot disease incidence rate lower than Aksu.Between different varieties,the jujube black spot disease incidence of " Qiyuexian " is higher than Jun jujube and Hui jujube." Qiyuexian " in Aksu,Hotan and Kashi region of black spot disease,moderate incidence of the highest proportion of the largest,the proportion of severe incidence of the least.The incidence of Jun jujube is almost the same as that of " Qiyuexian ".Hui jujube in the three regions of the study,the lowest incidence,mainly for mild disease.In summary,July fresh in Hotan most suitable cultivation.Mainly for the high temperature,long sunshine,is conducive to the growth and development of jujube fruit,color and sugar accumulation,that is,the formation of jujube ripening quality,as well as in the phenological period ahead of maturity;less rainfall,can reduce the incidence of disease.Therefore,the Hotan area is the best suitable for the " Qiyuexian " area.