An experimental study on the culture of fry of Oreochromis mossambicus (Peters) in a peaty swamp in Sri Lanka using cowdung and poultry manure as fertilizer
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引用次数: 7
Abstract
Growth rates of fry of Oreochromis mossambicus were studied in a dug-out pond in Muthurajawela swamp, which had been fertilized with cowdung and poultry waste. This swamp is characterized by waters with very low pH, low dissolved oxygen and low values of primary productivity. The addition of fertilizer increased the gross primary production from 0.18 g C/m2-day to 1.08 g C/m2-day in about 40 days, with pH and dissolved oxygen values becoming favourable for growth of fry. The average growth rate of 0.04 g/day was comparable to the growth rates attained in favourable habitats in Sri Lanka.
在Muthurajawela沼泽的一个壕沟池中，用牛粪和家禽粪便施肥，研究了mossambicus Oreochromis苗种的生长速率。这片沼泽的特点是水的pH值很低，溶解氧很低，初级生产力很低。施用化肥约40天后，初级总产量由0.18 g C/m2-day提高到1.08 g C/m2-day, pH值和溶解氧值有利于苗种生长。0.04克/天的平均生长率与斯里兰卡有利生境的生长率相当。
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