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通过１９９２—１９９５年在南宁地区林科所种子园进行的调查，对可见半面树冠法、信息段法、球果切开法进行了深入研究，建立了可靠的综合预测模型。对模型的验证结果表明，上述预测方法具有精度高，应用简便的优点
Based on the investigation conducted in the Linke seed orchard in Nanning from 1992 to 1995, the in-depth study on the half-crown-crown method, informational segment method and coniferous incision method was established and a reliable comprehensive prediction model was established. The verification results of the model show that the above prediction method has the advantages of high precision and simple application