橡胶树抗寒高产新品种云研77-4产量和生长的观测

Observe and Survey on Yield and Growth of Anticold and High-Yield Rubber New Cultivar,Yunyan 77-4

经苗圃系比、初级系比和适应性系比试验表明：云南省热带作物科学研究所选育的橡胶新品种云研７７—４产量较高、抗寒性较强，副性状良好。１—６割年平均单株产干胶２．６５ｋｇ，为对照ＧＴ１的１２８．６％，抗寒系比区１—７割年平均单株产干胶３．９ｋｇ，为对照ＧＴ１的１５８．５％，生长比ＧＴ１快１６％—１９％，７年可开割。

Yunyan77-4 was selected by Tropical Cyops Research Institute of Yunnan .The different grade clone trial show that the new cultivar is anticold and high-yield.The mead dry rubber yields of 1-5 of tapping year in nursery and 1-7 of tapping year on adaptable clone trial are 2.65kg/tree and 3.9kg/tree,respectively.The yields are 128.6% and 158.6% when compared with the control(GT1),respcetively.