CAJ | 학술논문

通过三十个无性系在南阳区域的栽培试验，初选7个早期表现优良的无性系．推广到生产中去。提高无性系早期选择的效率，为楸树早期速生小径材培育提供了依据。三十个无性系在南阳区域的栽培试验是全国四个同步造林试验点的重要组成部分（河南洛阳、河南南阳、甘肃小陇山、北京大兴）。通过相同的无性系，全国分别区域的造林试验，提高了选育效率。本实验研究和以往一地选出无性系再做立地类型试验有本质的不同。
통과삼십개무성계재남양구역적재배시험，초선7개조기표현우량적무성계．추엄도생산중거。제고무성계조기선택적효솔，위추수조기속생소경재배육제공료의거。삼십개무성계재남양구역적재배시험시전국사개동보조림시험점적중요조성부분（하남락양、하남남양、감숙소롱산、북경대흥）。통과상동적무성계，전국분별구역적조림시험，제고료선육효솔。본실험연구화이왕일지선출무성계재주입지류형시험유본질적불동。
Through the cultivation experiment of thirty clones in Nanyang, the author selected preliminarily seven excellent clones and promoted it into production. This measurement improved the efficiency of early selection of clone and provided the foundation to breeding the small - diameter lumber of fast - growing in their early stages. The cultivation ex- periment of thirty clones in Nanyang is an important part of the four synchronous forestation sites, in China （Luoyang city in Henan,Nanyang city in Henan, Xiaolong mountains in Ganshu, Daxin district in Beijing）. The breeding efficiency was improved through the afforestation test in the various areas of China using the same clones. The research has essential difference from the previous study to select clones.