橡胶树胶木兼优引进品系热试21高级系比试验初报

Preliminary Report on Advanced Trail for Latex/timber Clone of Introduced ReShi 21 in Hevea brasiliensis

橡胶树品系热试21是引种的胶木兼优品系,经过10 a的高级系比区试种试验,综合表现突出:开割前离地1.5 m处树围平均增粗8.72 cm,极显著高于对照(RRIM600);开割后3割年间的平均年干胶产量2.22 kg/株和1 012.05 kg/hm2,分别比对照高55.24%和146.04%;在2008年寒害中寒害级别低于对照,10 a累计风害断倒率低于对照;第3割年末死皮停割率为3.0%,比对照高1.2个百分点,无显著差异。根据该品种特性,建议在相似类型植胶环境扩大试验试种面积。

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 fi/st 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