【摘要】 对杉木初级种子园进行适时合理疏伐，可使种子园种子产量大幅度增加。按照无性系生长的差异，每公顷保留２４０～３００株、３００～３６０株对种子增产效果显著。疏伐后种子产量年均每公顷达１１４．２ｋｇ。更多还原

【Abstract】 If Cunninghamia lanceolata primary seed orchards are thinned rationally and timely, the output of the seeds will increase greatly. According to the difference of the clones growth, when 240～300 or 300～360 stems are kept per hm 2 in orchards, the seed production is on the steady increase. The per hm 2 annual output of seeds will take average of 114 2 kg. Author’s address Linduo Forest Farm of Tiane County, Guangxi 547300 PRC更多还原