Method for breeding tilapia mossambica with yield twice a year

Abstract

The invention relates to a method for breeding tilapia mossambica with yield twice a year, comprising the following steps: firstly stocking terch 80-100 fishes / acre and chub 30-50 fishes / acre at January in each year; when water temperature is stably at more than 20 DEG C at the middle of March, stocking wintering tilapia mossambica 1000-1500 fishes / acre, thereby the tilapia mossambica can be can be sold in batches from June to July, wherein size can be 600-700gram / fish; and secondly stocking the tilapia mossambica 500-1000 fishes / acre, the terch 50-80 fishes / acre and the chub 20-30 fishes / acre, thereby the tilapia mossambica can be sold in batches from November to December, wherein the size can be 400-500gram / fish. Feeding grain compound feed (the content of protein is about 30%) in very morning and afternoon, wherein feeding quantity is 3-5% of the weight of the fishes. A pond is sterilized by calcium oxide with quantity being 15 kilograms for each acre and each meter every 15 days, and the pH value of the pond is adjusted to be 7.7-8.0. Aerator is started up for 1-2 hours from 2 clocks to 4 clocks in very afternoon. The method shortens a breeding period of the tilapia mossambica, achieves even sale, and avoids sale in huddles at the end of every year, and can effectively improve pond yield and economic benefit.

Description

Technical field: [0001] The invention relates to the technical field of aquaculture. technical background: [0002] Tilapia is a warm-water fish native to the tropics and subtropics. It is also one of the fish recommended by the Food and Agriculture Organization of the United Nations to countries all over the world. , high yield, strong disease resistance, easy breeding and other characteristics, suitable for various water bodies and adopt various methods for breeding. In 1956, after my country introduced Mozambique tilapia from Vietnam, the history of tilapia farming in China began. In recent years, with the cultivation and promotion of fine tilapia varieties, as well as the continuous emergence and development of various high-density, high-yield intensive farming techniques and farming methods, the development of tilapia aquaculture in my country has been greatly promoted. After more than 20 years of development, my country's tilapia farming technology is becoming more a...

AI Technical Summary

Problems solved by technology

Although this breeding method is simple and easy to operate, and there is no risk of overwintering and freezing fish to death, a realistic problem is that many farmers concentrate on harvesting at the end of the year, which will inevitably lead to an oversupply of fish. The decline in the price and the decline in economic benefits have caused the problem that the benefits of tilapia farming cannot be further improved, and have become one of the biggest constraints on the development of the tilapia farming industry.