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近年来,在陕西省秦岭板栗产区,出现大量挂果幼树死亡现象,给板栗生产造成严重威胁。为探索其死亡原因,我们从1989—1990年进行了详细调查。
In recent years, in the chestnut producing area of Qinling in Shaanxi Province, a large number of kiwi saplings have died, posing a serious threat to the production of chestnuts. To explore its causes of death, we conducted a detailed survey from 1989-1990.