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黄土丘陵区核桃丰产栽培技术研究高中山，王贵，张喜斌，杨建华，梁凤玉（山西省林科所，太原，０３００１２）１材料与方法１．１自然条件试验于１９９０～１９９２年在山西省蒲县古县垣富家村核桃园中进行。地形为缓坡垣面，海拔１２３０ｍ，年降水量５８３ｍｍ，年平均...
High-yield Cultivation Techniques of Walnut in Loess Hilly Area GAO Zhong-shan, WANG Gui, ZHANG Xi-bin, YANG Jian-hua, LIANG Feng-yu (Forestry Bureau of Shanxi Province, Taiyuan 030012, China) 1 Materials and methods 1.1 Natural conditions test In 1990-1992, Ancient County wall rich village walnut park. Topography of gentle slope wall surface, elevation 1230m, annual precipitation 583mm, annual average ...