论文部分内容阅读
一、水库的选择。施肥养鱼是通过人为地补充水体中的氮、磷、钾含量或调整其比例来增加水体的肥源,繁殖浮游生物,提高滤食性鱼类的产量。要求水库的水质良好,天旱不干涸,无毒害的污染物流入,年水体交换量5次以下,水温高于20℃的时间在150天以上,平均水深8米以内,水草少,光照好,非饮用水。二、施肥技术。1、肥料选择。有机肥一般做基肥,施肥前必须腐熟,以免对水体造成污染;无机肥做追肥,溶解后再施用。2、施肥时间。水温15℃时开始施肥,水温在20℃以上为施肥的关键时间,即每年的4月至10月底。3、施肥地点。小(一)型水库的中上游,水深不超过8米的无草区。小(二)型水库全库泼洒,但不能
First, the choice of reservoir. Fertilization of fish is by artificially replenish the water of nitrogen, phosphorus, potassium content or adjust its proportion to increase the fertility of water bodies, breeding plankton and improve the production of filter-feeding fish. Requirements of the reservoir water quality is good, the drought does not dry, non-toxic pollutants inflow, annual water exchange capacity of 5 times the water temperature above 20 ℃ for more than 150 days, the average depth of less than 8 meters, less water, light, Non-potable water. Second, fertilization technology. 1, fertilizer selection. Organic fertilizer generally do basal fertilizer, fertilizer must be decomposed before fertilization, so as not to cause pollution to the water; inorganic fertilizer to make fertilizer, dissolved and then applied. 2, fertilizer time. Water temperature at 15 ℃ began to fertilization, water temperature above 20 ℃ is the key time for fertilization, that is, every year from April to the end of October. 3, fertilization sites. Small (a) type of reservoir in the upper reaches of no more than 8 meters depth of grass-free zone. Small (two) reservoir spilled, but can not