江阴县不产毛竹,但年年用量很大.长期以来,是依赖国家调拨和兄弟县的支援.为了自力更生的解决竹材缺口,经过逐年引种试栽,目前面积已接近万亩,累计成竹蓄积70余万支,最大胸围已达12寸,开始砍伐利用,年产竹材2万支左右.但从1978年以来,由于先后遭到高温、干旱、低温、涝渍及蚧壳虫危害,致使叶色变淡、卷曲,年年换叶,竹园林地也出现了跳鞭、挠鞭现象,三年来出笋成竹锐减,甚至基本无笋,长势不良(图1).为了摸清原因,提出有效的生产措施,特进行了调查研究,现将结果整理如下: Jiangyin County does not produce bamboo, but every year a large amount of consumption .For a long time, is dependent on the national allocation and the support of the brothers .In order to solve the bamboo gap by self-reliance, after the introduction of planted year after year, the current area is close to mu, accumulated bamboo accumulation More than 70 million, the maximum bust has reached 12 inches, began to cut use, with an annual output of about 20,000 bamboo .But since 1978, has been subjected to high temperature, drought, low temperature, waterlogging and scale insects harm, resulting in leaves Color fades, curly, every year for leaves, bamboo garden also appeared jumping whip, Flex whip phenomenon, bamboo shoots dropped sharply in three years, or even no basic bamboo shoots, growing poor (Figure 1) .In order to find out the reasons, Put forward effective production measures, special investigation and research, the results are summarized as follows: