养殖技术对山东省海水养殖渔业可持续发展的作用

根据山东省1978-1999年间海水养殖面积、产量和单产统计资料，解析了海水养殖业发展过程中，养殖产量受养殖面积增加和养殖单产水平变化的影响程度，研究表明：（1）近20斫来，山东省海水养殖单产提高幅度很小，对海水养殖产量增长的贡献率较低；（2）养殖面积保持较高的增长率，尤其是90年代中期以后，养殖面积的快速增长与养殖单产的急剧下降形成鲜明对比，外延性扩大再生产比例过高，内涵性扩大再生产比例过低是过去20年山东省海水养殖业发展的主要特征，可以认为不断提高养殖技术是实现山东省海水养殖业可持续发展的关键所在。

Effects of maricultural technique on sustainable development of mariculture in Shandong Province

According to the statistical data of total farming area (total production and yield per unit area) in Shandong Province from 1978 to 1999, the present paper discusses the effects of farming area and yield per unit area on the total farming production in the past 20 years. The very study shows that in the last 20 years, the yield per unit area of mariculture in Shandong Province did not increase very fast and the contribution to total marine farming production was lower. It was found that in the last 20 years, the marine farming area in Shandong Province increased consistently. Although the total marine farming area increased rapidly after the middle of 90's, the yield per unit area decreased. The differences between them were extremely obvious. The contribution of enlarged reproduction by increasing farming area for total farming production is much bigger than that of farming technique over the last 20 years. This is the one of main characteristics in the development of marine farming in Shandong Province. The enhancement of the farming technique is the key to the sustainable development of mariculture in Shandong Province.