红河州柚木种源试验五年评价

在云南省红河自治州河口县对３５个柚木种源的５ａ试验结果表明：种源间在树高、胸径上呈极显著差异，其中超过标准种源（相当于平均水平）的分别有１６个和１７个。以胸径超过标准种源１０％，材积超过４０％为选择标准，则８５０７、８６０２、８６０３、８０２１、１３０７、８０２１、、８５１３、１８５０８号选为适生优良种源，其树高、胸径、材保扔现实增益平均分别为１７．０％、１９．９％、７０．３％；其中前２个种源的材

Provenance Test on Growth Evaluation of Teak in Honghe

teak provenances were test in Hekou County,Honghe Prefecture,Yunnan Province.At the age of 5,there are remarkable differences in H (height) and DBH among provenances in which 16 surpassed standard provenance (average level) in H and 17 in DBH.Based on criterion for selection10% over the standard provenance in DBH and 40% over in volumeprovenance 8507,8602,8603,8021,1307,8022,85131,8508 were considered fine.Meanwhile,the average reeal gain of the fine provenances in H,DBH and volume accounted for respectively 17.0%,19.9% and 70.3%,and their expectation genetic gains in H,DBH and volume were separately 10.0%,11.4% and 45.8%.The real gains in volume of the best two provenances came up to 128% and 107% separately.Because of highly closed growth interrelation among ages,selection at early stage would be efficient.