Regional Test of Six New Varieties of Hevea brasiliensis in Dehong Prefecture
In order to select new rubber tree varieties suitable for Dehong rubber-planting areas,six new rubber tree varieties,including Reyan 879,Reken 628,Reyan 73397,IAN873,Reken 525 and Zhanshi 32713,were introduced and field-tested in Ruili City.Indicators such as stem circumference,yield,dry rubber content,tapping panel dryness rate and cold tolerance indexes of 6 new varieties of rubber trees were evaluated comprehensively.The results showed that:(1)Stem girth increased faster in Reken 628,Reyan 73397 and IAN873 before tapping and can reach to the tapping standard in the 8th year.Stem girth increased faster in Zhanshi 32713,Reken 628,Reyan 73397 and Reken 525 after tapping,and maintained rapid growth compared with the control.(2)Average dry rubber yield per tapping of Reyan 879 was significantly higher than that of the control,and Reken 628 was significantly higher than that of the control.The dry rubber yield of per hectare in Reken 628 and Reyan 879 was better than that of the control,and the difference was very significant.The Dry rubber content of Reken 628 was lower than that of the control.The difference was significant compared with the control.There was no significant difference between other varieties and the control.(3)Incidence of tapping panel dryness was as follows:Reken 628＞Zhanshi 32713＞IAN873＞Reyan 879＞Reken 525＞Yunyan 77-4(CK)＞Reyan 73397,TPD rate of Level 4 and 5 was as follows:Reken 525＞Reken 628＞IAN873＞Reyan 73397＞Reyan 879＞Zhanshi 32713＞Yunyan 77-4(CK).(4)The cold-tolerant indexes of Reken 628 and Zhanshi 32713 is better,and the cold tolerance indexes of IAN873,Reyan 879 and Reken 525 is worse.In view of the comprehensive performance of 6 rubber varieties in Dehong,the rubber tree Reyan 879 can be selected as the renewal of rubber gardens with better natural stands conditions,The high-yielding and cold-resistant varieties Reken 628 and IAN873 can be selected forarea with mild cold injury in the past.
万方数据
维普
