山核桃为浙江重要的木本油料树种。目前山核桃生产的最大问题是产量极不稳定,大小年非常显著,往往大年丰产,而小年歉收,甚至颗粒不收,特别是近几年来,更出现连续小年的现象。因此,如何采取有效措施来消灭或减轻大小年现象,是保证现有林稳定丰产的关键。本文拟根据近几年来对山核桃的生物学特 Hickory Zhejiang important woody oilseed species. At present, the biggest problem in the production of pecan is the extremely unstable yield. The annual size is very significant, and the annual yield is often large. However, the annual harvest of small peasants does not even occur. In particular, in recent years, the continuous small-year phenomenon appears. Therefore, how to take effective measures to eliminate or reduce the size of the year is the key to ensure the stability and yield of the existing forest. This article is based on the biological characteristics of pecan in recent years