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How to Make a Preliminary Judgment on the Quality of Pelleted Fish Feed
In recent years, along with the growing popularity of high-yield fish farming, the use of complete pelleted fish feed in fishery production has become very common. However, because there are many feed brands on the market and great differences exist in quality and grade, the vast number of farmers are unable to judge the merits of its quality. This article introduces a simple method for judging fish feed quality by sensory means. That is: "one look, two sniffs, three twists, four soaks, five chews," for everyone to use as reference when purchasing pelleted feed. 1. Look 1.1 Look at color: pelleted fish feed
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Preliminary Research Report and Analysis of the Larch Sawfly
1 Distribution and Damage The larch Itempast sawfly is mainly distributed in Heilongjiang and Jilin provinces. It is a dangerous pest of larch foliage, with a damage period from June to September, mainly attacking 10-30 year old larch. This insect spreads relatively quickly and causes severe damage. In 1985, the affected area in Hailin Forestry Bureau was 300 mu, and by 1986 the third-generation larvae affected an area of 150,000 mu, of which 67,000 mu were severely damaged, with the highest population density reaching 21,000 larvae per tree; the average population density
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A Preliminary Study on the Small-Water-Body Aquaculture Technique for the Liaodong sculpin
The sculpin, known by local folk names such as "xiagaizi," "xiageda," "xiapangzi," and "datouyu." It is distributed in the Dandong Yalu River and its tributaries, the upper reaches of the Biliu River, the upper reaches of the Hun River, and other waters. In the first half of 2002, Liu Yuanzhi, a farmer from Shalizhai in Fengcheng, boldly contracted the village's "drought-resistant large-mouth well," which had been built during the period of "vigorously carrying out farmland capital construction." It had been abandoned and overgrown for many years, with a shallow pit and little water, covering an area of 6 mu. Based on his family's financial capacity, he invested 4,000 yuan that year, excavated and cleared a small fish pond with a water surface of 2 mu
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Preliminary Processing Methods and Key Technical Points for Raw Rabbit Hides
After tanning, rabbit hides can be made into collars, hats, children's coats and clothing, etc. They are both lightweight and attractive, and are very popular. Below are some commonly used preliminary processing methods for raw rabbit hides. When selecting rabbit hides, the first step in deciding whether to keep the hide of a slaughtered rabbit is to look and then to feel. First, look at the size of the rabbit and whether the fur is glossy. Hides from malnourished or diseased rabbits should not be used; hides with sparse, messy fur should not be used; hides from rabbits that are too small should not be used. Choose hides whose coat hair is glossy. Second, feel whether the hair sheds and whether the hide is thick and feels good. If the hair sheds,
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