论文部分内容阅读
夏秋季节,天气炎热,鱼塘施肥应注意避免以下“三忌”,防止施肥不当而造成池鱼死亡。一忌一次施肥量过多。夏秋季水温高,鱼吃食旺盛,排泄物增多,有机质分解加快,加上气候多变,水质易变化。施肥应采用少量多次的原则。具体的施肥次数和施肥量应根据鱼塘的水色和水体透明度来掌握,一般来说当池水透明度在40cm以上说明池水较瘦,应及时施肥;当透明度在20cm以下时,说明池水过肥,不要施肥。每次施肥量不宜过多,并应以化肥为主,少施有机肥,一般每次亩施尿素1.5—2.5kg,结合施过磷酸钙3—4kg
Summer and autumn, hot weather, fishponds should pay attention to avoid the following “three bogey” to prevent inappropriate fertilization caused by the death of a fish pond. Avoid excessive doses of fertilizer. High summer and autumn temperatures, fish eating exuberant, excrement increased, decomposition of organic matter to speed up, coupled with changing climate, easy to change water quality. Fertilization should be used a small number of times the principle. The specific number of fertilizer and fertilizer should be based on the aquarium and water transparency of the fish pond to grasp, in general, when the water transparency of more than 40cm shows that the water is relatively thin, should be timely fertilization; when the transparency below 20cm, indicating that the water is too fat, not Fertilization. Each amount of fertilizer should not be too much, and should be based on chemical fertilizers, less organic fertilizer, generally 1.5 to 2.5 kg of urea per mu, combined with the application of calcium phosphate 3-4kg