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The requirements of bait for leeches in the technology of breeding leeches
First, the nutrition of leeches requires that leeches, like other animals, need five kinds of nutrients for their growth and development, such as protein, fat, sugars, inorganic salts and vitamins. Leeches have no requirement for nutrients at different developmental stages and in different environments.
2020-11-08 Breeding leeches technology yes bait requirements one -
Fluoroquinolones and photosensitivity in ducks
The photosensitivity of ducks refers to the disease of blisters or ulcers in the upper beak and web epithelium of ducks caused by ultraviolet radiation of sunlight after eating substances containing photosensitivity. The disease is characterized by deformation of upper beak and flippers of diseased ducks, exfoliation of keratinized layer and conjunctivitis of eyes. 1. The clinical symptoms and pathological changes of the disease can be seen in all breeds of ducks. the age of onset tends to be smaller, and it occurs evenly in all age groups after 10 to 20 days of age. The morbidity varies, and the mortality rate is generally low (such as secondary bacteria or viruses.
2019-01-16 -
Zhang Zhengbin: transforming the middle and low yield fields in arid areas to tap the potential of agricultural production
Zhang Zhengbin, a researcher at the Agricultural Resources Research Center of the Institute of Genetics and Developmental Biology of the Chinese Academy of Sciences, in recent years, the price of foreign grain exports is on the low side, the price of Chinese agricultural products is close to the ceiling, and the floor of production costs is rising; the burden of state subsidies for supporting agriculture is too heavy.
2016-01-10 Zhang Zhengbin transformation arid areas medium and low yield fields excavation agricultural production -
Ten kinds of plants that lazy people can grow very well.
Fresh animals have their developmental discipline, with flowers falling, sprouting in spring, yellow leaves in autumn and even fallen leaves. Haina Tiansheng is in the design and construction of plane greening.
2019-02-28 -
High-yield cultivation of Zanthoxylum bungeanum in high cold and arid mountain area
High-yield cultivation of Zanthoxylum bungeanum in high cold and arid mountain area
2018-06-29 -
Cultivation and Management of Chinese Chestnut
Castanea mollissima is a famous fine dried fruit tree of Fagaceae. Chinese people have thousands of years of cultivation history and accumulated rich experience. It occupies an important position in the economic life of our people. Chinese chestnut is rich in nutrition and delicious. It can be eaten fresh, fried, cooked and made all kinds of snacks and dishes. It has the characteristics of sweet, fragrant and waxy.
2018-09-13 -
What causes cucumber flower topping?
What causes cucumber flower topping? Please introduce cucumber "flower top", also known as "flower holding head", which is a common physiological obstacle on cucumber in greenhouse, which is usually characterized by shortening of internodes near the growing point and heterozygous flower clusters without heart leaf formation.
2018-09-10 -
Introduction of Canna and how to cultivate Beautiful Canna
Introduction of Canna and how to cultivate Beautiful Canna
2019-03-05 -
Explain the reason of "immature bolting" of spring cabbage
Cabbage is a fertilizer-loving and fertilizer-resistant vegetable. Generally, about 35 days after planting, the plant reached the peak of nitrogen, phosphorus, calcium and other elements and absorption, while the absorption of potassium reached the peak at 50 days. Before reaching the peak value, the fertilizer uptake of plants increased linearly with the process of growth period. Cabbage at different growth stages.
2018-09-12 -
Growth characteristics of fruiting mother branches
Growth characteristics of fruiting mother branches
2018-07-24 -
The method of jujube stem determination
The method of jujube stem determination
2018-07-24 -
Is it the problem of sows or is it the problem of repeated infertility in sows?
Is it the problem of sows or is it the problem of repeated infertility in sows?
2020-05-25 -
Environmental conditions for the growth of edible fungi
The environmental conditions of edible fungi the growth and development of edible fungi is controlled by internal and external factors. The internal factors are determined by the genetic law of edible fungi.
2019-02-22 -
How to plant Angelica sinensis?
How to plant Angelica sinensis? Please give instructions for planting Angelica sinensis can refer to the following methods: transplanting seedlings loosen the soil and weed 3 or 4 times a year, the first time when the seedling height is 3~5cm. After weeding in the middle tillage, topdressing fertilizer was applied for the first time 1500-2500 kg of dilute human and animal manure per 667 square meters, and the second and third times for ripening per 667 square meters.
2018-07-18 -
Effect of temperature on the growth and development of flowers
Effect of temperature on the growth and development of flowers
2020-02-21 -
Chinese and foreign scientists draw a sketch of adzuki bean genome
Chinese and foreign scientists draw a sketch of adzuki bean genome
2019-02-18 -
Culture techniques of forest musk deer
Forest musk, also known as South Musk Deer, Forest Musk Musk, Black Swertia, Forest Swertia, Swertia angustifolia, is a timid, lonely animal. Although it is a first-class protected animal, it can be artificially bred and bred. Its breeding techniques are introduced below. Culture techniques of forest musk deer
2020-11-11 Forest musk deer culture technology forest musk deer also said southern musk deer -
What's the name of the larva of a fly?
What's the name of the larva of a fly?
2018-07-03 -
Occurrence and control of total erosion disease of wheat
Occurrence and control of total erosion disease of wheat
2018-07-10 -
Points for attention in the use of fungicides
Points for attention in the use of fungicides
2018-08-09