摘要
本文介绍了陕西省8个地市、32个支点县1988年油松结实量的预测与实产情况,并对制约产种量的地域、坡向、立木密度等因素进行了分析。
The prediction and real output of Chinese pine seed production in 32 major counties of 8 pertectures of Shaanxi are introduced in the paper, The some of restricted factors as regions,slope aspect,density of trees are analyzed also.
出处
《陕西林业科技》
北大核心
1992年第4期1-4,共4页
Shaanxi Forest Science and Technology
关键词
油松
产量预测
Pinus tabulaeformis
Production prediction
