一、前言遵循毛主席关于“有了优良品种,即不增加劳动力、肥料,也可获得较多的收成”的教导,一九七三年和一九七四年在我县核桃集中产区的四个公社,十二个生产大队,三十一个生产队开展了核桃优树的初选工作.在群众报选的基础上,对275株较优植株进行了每木调查,并应用其中67株各随机取样50粒核果进行了与选种有关的主要经济性状的鉴定分析.参考我们目前仅有的有关资料,初步选出我县核桃优树十八株. First, the foreword Follow Chairman Mao’s teachings that “with excellent varieties, that is, without more labor, fertilizer, can also get more harvest ”, in 1973 and 1974 in my county concentrated in walnut The four communes, twelve production brigades and thirty-one production teams carried out the primary election of the walnut trees, and on the basis of mass election, 275 trees were surveyed and applied Of which 67 were random sampling of 50 drupe of the selection of the main economic traits associated with the identification of the analysis.Reference to our only relevant information, initially selected 18 counties of walnut trees.