Preliminary Report on Advanced Trail for Latex/timber Clone of Introduced ReShi 21 in Hevea brasiliensis
ReShi 21 was shown distinguished overall performance after 10 years systematical observation in advanced trial area,which was as form of Introduced latex/timber clone in hevea brasiliensis.The average annual girth growth value reached 8.72 cm,which was extremely remarkable higher than control clone(RRIM600);The average annual dry rubber yield for the first three tapping seasons attained 2.22 kg/tree or 1 012 kg/hm 2,which was 55.24 percent or 146.04 percent higher than control clone respectively.Reshi 21 performed more resistant to cold injury in 2008 as well as lower accumulative snapping and uprooting rate during the last 10 years.The tapping panel dryness rate achieved 3.0 percent at the end of third tapping season,about 1.2 percentage points higher than control clone.In conclusion,according to variety characteristics,Reshi 21 was recommended to enlarge its testing area in plantations with the same climate conditions