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荔枝是增城县的主要水果之一.全县现有荔枝树约50万株,面积3万余亩.但产量低而不稳.1949-1981年间最高年产量为176000多担,最低年的产量只有3200多担,相差50多倍.由此可见,荔枝的大小年给生产带来极为不利的影响.(一)造成荔枝大小年的几个重要因素1.气候:荔枝的开花和结果,受气候条件的影响很大.荔枝的花芽分化和形成,需要低温和干旱的天气.如1963、1967、1970、1977、1979、1980、1981等年份的前1年12月至该年1月份,均遇上了不同程度的6℃以下低温、少雨和48-75%的相对湿度,有利于花芽分化和形成,为上述各年打下了丰年基
Litchi is one of the main fruits in Zengcheng County.The county has about 500000 litchi trees, an area of 30000 acres, but the output is low and unstable.The highest annual output between 1949-1981 was more than 176000, the lowest annual output Only more than 3200, a difference of more than 50 times.Thus, the size of the litchi annual production to bring very adverse effects (a) of litchi size of the year caused by several important factors 1 climate: litchi flowering and the results by Climatic conditions have a great influence on litchi flower bud differentiation and formation, the need for low temperature and drought weather, such as 1963, 1967, 1970, 1977, 1979, 1980, 1981 and other years before December 1 to January of that year Encountered different degrees of 6 ℃ below the low temperature, light rain and 48-75% relative humidity, is conducive to flower bud differentiation and formation, laid a good foundation for these years