植物生态多样性第二次功课(国外英文资料).docVIP

动物生态多样性第二次作业 What should be noted in the breeding process 1, breeding density Before raising koi, it is important to consider the size of the container and the number of tails it can hold. In terms of the density of the feed, the size, water, water temperature, the amount of oxygen, the size of the fish and the growth situation are adjusted. 2, variety When raised in the garden basin, it is commonly used in red, high and third colors, showy and tricolor, gold or platinum, yellow autumn water and light yellow. 3, bait casting method Brocade carp is omnivorous fish, animal or plant bait can be feeding, such as water fleas, worms, shrimp, water, corn flour, biscuits, vegetables, rice can even feeding. But to brocade carp colourful, in addition to cooperate with powder, background light and water quality, more important is a special feeding high nutrition brocade carp grace artificial feed, flake or granular. 4, the management focus of different seasons , because of the large activity of brocade carp in oxygen consumption power, so they are to install the pool or aquarium filter and air compressor, and regularly sucked to the bottom of the stool, the bait and dirt, add a small amount of new water. In addition, pay attention to the management key of different seasons. In the spring, the fish begins to recover from hibernation, the constitution is weaker, the amount of bait should be increased by a small number of gradually, and the more plant sex ratio is big of the bait, the fish digest absorb. In the summer, the plastic screen should be covered to keep the water warm. Otherwise, the fish pond (box) is under the intense sun exposure, the water temperature rises, the phytoplankton blooms, the water quality is cloudy, the water is in the way of the view. At the same time, the ultraviolet ray in sunlight has certain harm to the added color of the koi. In the autumn, it is the best season for the carp to grow. The ingredients of the bait should increase the proportion of a