The Study Of The Rhizosohere Microorganisms Of Varieties Of Tea

Tested the number of three groups of rhizosphere microorganisms in 11 tea cultivars, and analyzed the correlation between rhizosphere microorganisms and tea varieties, and indicators of soil physical and chemical. Specific results were as follows:(1) The diversity and its variation of the rhizosphere microbial in different tea varieties.The number of total microorganisms of Zhuyeqi NO 12(1.606×107/g dry soil) was the highest in summer,whlie The number of total microorganisms of Baihaozao (9.88x106/g dry soil) was the highest in Fall,except the number of total microorganisms of Longjingchangye,Zhuyeqi NO 12 and Zhenong NO 113 were more in summer than its in fall,other species of microorganisms in the rhizosphere were higher in fall than its insummer.In summer, the largest number of rhizosphere fungi was Baihaozao (9.48×103/g dry soil), the largest number of rhizosphere actinomycetes was Japan Yabukita (2.39x105/g dry soil), the largest number of rhizosphere bacteria was Zhuyeqi NO 12 (1.587×107/g dry soil);infall, the largest number of fungi,actinomycetes and bacteria wererespectivelyZhuyeqi NO 12 (2.638×104/g dry soil), Zhuyeqi NO 12 (5.473×105/g dry soil),Baihaozao (9.53×106/g dry soil).(2) The indicators of physical and chemical of rhizosphere soil in different tea varieties. The highest content of water in summer was South River NO 1(22.1%), The highest content of water in autumn wasLongjing tea leaves (21.4%); South River NO 1's pH value was the highest, while Japan Yabukita's pH value was the lowest in summer;In fall, the differences of pH values in most of the varieties of species did not reach significant level. Only Wuniuzao and Biyun's pH value were lower in fall than that in summer. In summer,the hightes contents of soil available N, available P and available K were respectively South River NO 1 (226.59mg/kg), Wuniuzao(52.398mg/kg) and Wuniuzao(250.849mg/kg); in fall, the differences of available K was not obvious, the hightes contents of available N, available P were Yichangchangye (126.57mg/kg), Baihaozao (16.57 mg/kg). The difference of content of rhizosphere soil organic matter in different varieties tea tree were not clear between in summer and fall, only South River NO 1, Wuniuzao,Biyun, Japan Yabukita Anhui 7 were higher in autumn than those in summer, the difference of the content of Yichangchangye was not significant between in summer and in fall. (3) The relationship between the amount of tea rhizosphere microbial and its soil factors. Stepwise regression analysis showed:the soil water content, pH value, available nitrogen and phosphorus significantly affected the number of fungi; soil pH value, available nitrogen, phosphorus and organic matter effected the number of actinomycetes obviously; soil pH value, available N, Phosphorus had effecte on the total number of bacteria and microorganisms. Path analysis showed:pH value, available phosphorus were the main factor in affectting the number of fungi, bacteria and microorganisms, in which, path coefficients of phosphorus reached a significant level(0.9953), mainly influenced the number of fungi, bacteria, and total microorganisms by the interaction of pH value, available phosphorus and other soil factor.The correlation coefficient of the total number of bacteria and microorganisms all reached a significant level, but their direct path coefficient did not reach significant level, mainly affacted the number of fungi, bacteria, and total microorganisms through the interactions of pH value, available phosphorus and other soil factors.(4) The distribution of population tea rhizosphere fungi. Some common species which were identificated were Penicillium, Trichoderma, Aspergillus, Rhizopus, Mucor and Fusarium. In 11 different varieties of tea,fungi appeared as Penicillium, Aspergillus, Rhizopus, followed by Mucor, Gliocladium,Fusarium and other fungi. The number of fungal species was not the same in different varieties of tea rhizosphere soil,and the pro rata of every fungi was different,Japanshubaizhong rhizosphere fungi was made up 12 species, while Longjingchangye rhizosphere fungi only had 5 sp ecies.