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Since the late fifties，under the guldance of prof·C·K·Tseng，we .have suceeede‘rrrrrrrrrrnin devising a method of summering young sPorelingS at low temPerature by collectingrrrrrrrrrrnthe sPores In early summer instead of middle or late autumn.The sPores andsubsequ·rrrrrrrrrrnently the garaetophytes and the voung sDoroDhvteg are eultivated in sporeling culturerrrrrrrrrrnstations，somewhat like a greenhouse，in a temPerature of abouts 8一10“C.By means ofrrrrrrrrrrnehanging the time of spore eolleetion，the sporophytes，when taken ont from the oultiva-rrrrrrrrrrntion system and cultivated inthe oPen sea in middle or late autumn，are already 1一2rrrrrrrrrrncentimeters in oize and are able to grow faoter，resultlng in a longerfrond and a higherrrrrrrrrrrn.Produetion.Unfortunately，it haPPened that sometlmes the sPorelings died due toarrrrrrrrrrndestructive disease of unknown nature.In serious oases，all the sPorelings died due thinrrrrrrrrrrna few days.In South China，for example，in Fujian province，the surfaee sea waterrrrrrrrrrrntemPerature in summer 15 too high forthe fronds to deve
Since the late fifties, under the guldance of prof · C · K · Tseng, we .have suceeede ’ r r r r r r r r r nin devising a method of summering young sPorelingS at low temPerature by collecting r r r r r r r r r r r r r nthe sPores In early summer instead of middle or late autumn. sPores and subsequ r r r r r r r r r r nently the garaetophytes and the voung sDoroDhvteg are eultivated in sporeling culture r r r r r r r r r nstations, somewhat like a greenhouse, in a temPerature of abouts 8-10 "C.By means of r r r r r r r r nehanging the time of spore eolleetion, the sporophytes, when taken ont from the oultiva- r r r r r r r r r ntion system and cultivated inthe oPen sea in middle or late autumn, are already 1 a 2 r r r r r r r r r r ncentimeters in oize and are able to grow faoter, resultlng in a longerfrond and a higher r r r r r r r r r n.Prodution.Unfortunately, it haPPened that sometlmes the sPorelings died due toa r r r r r r r r r r ndestructive disease of unkno wn nature.In serious oases, all the sPorelings died due thin r r r r r r r r r na few days. In South China, for example, in Fujian province, the surfaee sea water r r r r r r r r r n nPetemPerature in summer 15 too high forthe fronds to deve