1. Pond conditions: The intensive production of high-yielding fish ponds requires good water sources, convenient irrigation and drainage, an area of ​​1334-3335 m2 (2-5 mu), water depth of 1.5-2 m, fresh water, rich dissolved oxygen, and less silt in the bottom of the pool. .…

Place the selected citrus in a cool, ventilated place for 3 to 5 days. Let it evaporate a small amount of water for storage. When storing, put a layer of 1~2 cm thick pine needles on the bottom of the container (requiring fresh non-stick water without branches), and then neatly put a layer of …

First, the preparation of pro-crab artificial reproduction of crab seedlings, must first have enough brooding crabs. At present, it is mainly achieved through two approaches: one is the capture of natural pregnant crabs from the sea, and the other is the placement of matured pro-crabs into the…

Up to 45% of the genome is known to be so-called transposable elements, and these transposition elements play an important role in the shaping and evolution of the biological genome. Barbara McClintocK proposed the concept of gene translocation by observing the color of corn kernels long b…

The lychee production generally has a long growth period, results are late, the yield is low, the pests and diseases are serious, the size of the results is obvious, and some litchi gardens do not produce results for many years. In order to solve the above problems, a comprehensive set of high…

Check the seedlings to make up for lack of when the survival of rapeseed transplants should be timely check seedlings to make up for lack of lack of nests to ensure that Miao Qi, Miao whole, Miao Zhuang.

Timely application of early fertilizer, industrious Miaofei. It is necessary t…

Scientists from the Shanghai Institute of Materia Medica, Chinese Academy of Sciences, have found that anti-SARS active ingredients in oranges, hawthorn and kiwifruit are found in the anti-SARS component of Chinese herbal medicine. At the press conference of the "China-Europe SARS Dia…

The scientific ingredients for ducks and ducks feed mainly on cereals, accounting for 50% to 60%, adding 10% to 20% of cakes, 10% to 15% of fishmeal, 1% of shell powder and salt, multivitamins and additives. The amount of fish meal can be increased or decreased according to the egg production …

Due to continuous planting for many years, pests and diseases of pepper seedlings occurred more frequently. However, because we basically grasped the law of its occurrence and prevention and treatment methods, the condition can generally be controlled at the initial stage of development, witho…

Wild leeks are delicious and nutritious and are one of the wild foods that people like to eat. The wild leeks have a short growing period, they can be cultivated in multiple seasons and harvested continuously to serve as supplements, adjustments, and enrichment of the vegetable market.
Wi…

Diesel speed means that the speed suddenly rises and it greatly exceeds the nominal speed. At this time, the exhaust sound of the diesel engine is getting denser, the exhaust pipe is emitting black smoke, and reducing the throttle can't reduce the speed. If no emergency measures are taken,…

The main components of galangal are 18-eucalyptus and methyl cinnamate, eugenol, terpenes, biscinene and so on. It also contains flavonols, kaempferol, kaempferol, suede. Elements such as isorhamnetin and a spicy ingredient have a broad-spectrum bactericidal effect. The green and green mold in…