【摘要】 探讨了豫南地区板栗树生长发育时期树体缺水状况、矿质营养的全价供给状况、栗剪枝象甲的当年为害状况、两次自然落果的预防措施 ,开花期的雨水、温度和疏雄管理 5种因素对大小年发生的影响。更多还原

【Abstract】 The article discusses how the five factors including the conditions of the lack of water,the sufficient supply of mineral nutritions , the contemparerary damage of Cryllorhynobites ursulus Roelof, preventing measures of two natural fruit drops, temperature and rains while blooming, removing staminate flowers affect major or minor year.更多还原