黑龙江省主栽杨树品系干部单宁含量与青杨脊虎天牛危害的关系
흑룡강성주재양수품계간부단저함량여청양척호천우위해적관계
Relationship between Tannin Content of Main Poplar Strains and Damage of Xylotrechus rusticus ( L. ) in Heilongjiang Province
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