Three-line hybridization Three-line hybridization is the cross-breeding of three varieties. Among these three breeds, crossbreeding was continued for several generations with one variety as the main variety. The main purpose is to form a "multi-series" breed of pigeons. Improved hybrid ......
As the saying goes, raising fish first raises water. The quality of water has a great influence on the growth and development of fish. Water quality is not good, fish is easy to get sick, and a good water quality environment is the basis for disease prevention. Here are some practical techniques fo ......
1? Preparation: 10 kg of watermelon rind, 15 kg of sucrose, 1.5 kg of starch syrup, 100 g of agar, and 70 g of citric acid. 2? Raw material pretreatment: Wash the watermelon rind, cut off the surface skin and the inner layer of melon and scoop, then cut into pieces, placed in a mincer to grind, to ......
In recent years, with the strong support of government departments at all levels, the construction of biogas in the county has developed rapidly. However, due to various reasons, there are different degrees of safety protection devices in the process of design and construction of biogas constructio ......
The price is not as cheap as possible. The key is to absorb the utilization rate: Because fur animals belong to meat-based omnivores. Therefore, the protein content in various feeds is relatively high, and a large amount of animal feed materials are particularly required. At present, some feed pr ......
First, timely cutting: feeding the male and female pigs in time after cutting, can shorten the fattening period of 30 days, saving 10% of feed. Second, loose and change the captive: Confinement pigs consume less energy, easy to grow meat, can save 10% -15% of feed. Third, warm winter ground temp ......
Each season has its own characteristics, and it has to be hard to apply. The result will be unsatisfactory. This is the basic concept that the technology adjusts according to the season. Take the autumn production as an example to briefly explain the technical focus as follows: First, base materi ......
Roof greening is a greening form that does not occupy land on the ground, and its application is more and more extensive. Its value lies not only in adding greenness to the city, but also in reducing the radiant heat on the roof of building materials and weakening the heat island effect of the cit ......
With the popularization of watermelon high-yielding cultivation techniques, the yield of watermelon has been greatly improved. However, due to the unreasonable soil structure in recent years, the reduction in organic matter content, coupled with people's one-sided pursuit of high yield, unreas ......
First, the selection of ground-planting hybrid millet must be carried out in reverse rotation, avoiding smashing. Choose sandy loam with good soil permeability. During land preparation, the land is required to be leveled, and the virtual reality is imposed. There are no large earth blocks and dark ......