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山东省费县地处山区，山丘面积占全县总面积的７６．４％。南部１３个乡镇石灰岩山丘面积为１７０００ｈｍ２。土质瘠薄，裸岩多，植被少，水土流失严重。为加快石灰岩旱薄地开发步伐，我们于１９９４—１９９７年开展了石灰岩山区旱薄地酸枣嫁接大枣大面积开发试验。１９...
Fei County in Shandong Province is located in the mountains, the total area of hills occupy 76.4% of the county. Thirteen towns in southern limestone area of 17000hm2. Soil infertility, bare rock and more vegetation less serious soil erosion. To speed up the dry limestone limestone development pace, we conducted in 1994-1997 in limestone mountain jujube jujube grafted Jujube large area development test. 19 ...