青蛤生态及繁殖习性

１９８７－１９９１年，我们对江苏南部沿海的青哈Ｃｙｃｌｉｎａ ｓｉｎｅｎｓｉｓ Ｇｍｅｌｉｎｌ进行了生物学的研究。     

STUDY ON SORI FORMATION IN LAMINARIA JAPONICA ARESCH

Sori formation in Laminaria japonica was studied from the ecological and physiological point of view. Cutting through the medulla of Laminaria japonica improved the formation of sori.Sori formation under different water temperature, photoperiod, and light intensity was investigated and total nitrogen and reducible sugar content determined. The result showed that son of L. japonica can be formed in 1-22℃ water in Dalian. No sori were found in water over 23℃. High temperature inhibits the formation of son, but low temperature has no effect. Apparently, light intensity affects the formation of sori, but photoperiod does not. In shallow water L. japonica grows slower but stores dry material faster and forms sori rapidly. In deeper water it grows faster in length but stores dry material slower and the sori formation is slow. Analysis of dry material shows that during sori formation the water content decreases but total nitrogen and total reducible sugar increase.Only when the storage of sugar reaches a cer     

海水中某些化学因子对魁蚶幼虫、稚贝及成体的影响

本文报道了S‰,NH_3-N,pH及O_2对魁蚶幼虫、稚贝及成体影响的初步研究结果,求得魁蚶幼虫、稚贝及成体对S‰,NH_3-N,pH和O_2的适应浓度范围和最适范围。结果表明:魁蚶随年龄的增长,对S‰的适应能力逐渐减弱;对NH_3-N,pH及O_2的适应能力则逐渐增强。     

内蒙古节能降耗成果显著 “十二五”任务依然艰巨

从内蒙古统计局能源处获悉,"十一五"前四年内蒙古生产总值能耗累计下降18.83%。目前,内蒙古已形成了以煤炭、炼焦、化工、建材、钢铁、冶炼、电力七大高耗能行业为支柱的工业体系,因此,降耗工作的成败,主要取决于工业。