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What is the optimal protein level in fish feed?
Protein is the main nutritional indicator of compound feed for fish, and the protein level directly affects the intrinsic quality of the fish feed. Different fish species and different growth stages have different optimal protein requirements. Too high a protein content not only wastes feed protein resources, but also increases the pressure of pond water quality management. Too low a protein content, on the one hand, causes slow fish growth and poor disease resistance, and on the other hand, delays production timing. Therefore, mastering the optimal protein level of fish feed is of great
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How much does management level affect Gastrodia elata yield?
Strengthening management is an important measure for obtaining a high yield of Gastrodia elata. The main thing is to keep temperature and humidity under control. During the growth of Gastrodia elata, the temperature should be kept at 20-25°C and must not exceed 25°C. The optimum humidity for the growth of Gastrodia elata is 65% and must not exceed 70%. It is best to add some grain and vitamin B1 to the water used for watering, that is, to water with nutrient water. In addition, ventilation and shading are also needed. Various weeds and fungi as well as damage to Gastrodia elata from rats, mole crickets and the like must be prevented and controlled. In short, the requirement is to advocate "early" in planting Gastrodia elata, demand "good" in the fungus sticks, and keep temperature
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15 new cotton varieties approved at the national level
The Ministry of Agriculture issued Announcement No. 706 on August 28 last year. The new cotton varieties approved at the fifth meeting of the First National Crop Variety Approval Committee are: 1. Zhongzhi Cotton No. 2: approval number 2006001. Breeding institution: Institute of Plant Protection, Chinese Academy of Agricultural Sciences, etc. It is a transgenic insect-resistant conventional spring cotton variety. The spring sowing growth period in the Yellow River Basin cotton region is 125 days. From 2004 to 2005, it participated in the regional variety trial of the spring cotton group in the Yellow River Basin cotton region. The yields of seed cotton, lint cotton and pre-frost lint cotton per
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What level does a cotton single boll weight of 8 grams represent?
1. Large bolls: The average single boll weight of this variety is 8 grams, with the largest single boll weighing 9.2 grams. Lint percentage is 41.5%, and seed index is 11.1 grams. 2. Good emergence: The seeding rate for this variety is 400-500 grams per mu, with strong germination vigor, good emergence, and uniform, vigorous seedlings. 3. Strong growth: The growth period of this variety is about 128 days, with medium-sized leaves and good ventilation and light penetration. Plant height is 105 cm, the cotton plants are clean, and the fruiting branches have strong outward extension ability. Cotton bolls are evenly distributed on the lower, middle, and upper parts of the plant and on the inner and outer periphery, and boll weight is consistent. 4. Good resistance: This variety is highly resistant to cotton
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Luodao 998 rice variety approved at the national level
Approval number: Guoshen Dao 2006073Variety name: Luodao 998Breeding unit: Luoyang Institute of Agricultural Sciences, Henan ProvinceVariety source: Systematic selection from upland rice 277Characteristics: This variety is a japonica-type conventional upland rice. Grown as a wheat-stubble upland rice in the Huang-Huai-Hai region, its whole growth period is 108 days, 1 day earlier than the control upland rice 277. The plant type is relatively compact, tillering ability is medium, plant height is 94.6 cm, panicle length is 18.1 cm, effective panicles per mu are 19.
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Yunlin Takes the Lead in Banning Swill Feeding for Pigs, Demonstrating National-Security-Level Commitment to Disease Prevention
Demonstrating the highest level of commitment to disease prevention, Yunlin County Magistrate Chang Li-shan, immediately after taking office yesterday (the 25th), held a press conference on African swine fever prevention accompanied by Environmental Protection Bureau Director Chang Chiao-wei and Agriculture Department Director Chang Hung-yu, announcing that from that day onward the entire county would ban swill feeding for...
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Can asparagus fern be grown hydroponically? The key to the hydroponic method lies in controlling the water level and light
Asparagus fern (Asparagus setaceus) is a perennial foliage plant, and hydroponics can achieve the dual effect of enjoying both the leaves and the roots, so many people are considering growing asparagus fern hydroponically. So can asparagus fern be grown hydroponically? The editor tells you that it can. Below, let us learn about the hydroponic method for asparagus fern, as well as precautions for hydroponic asparagus fern
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How to keep hydrangeas in a vase? Choose a good vase, control the water level, and protect them from wind
Hydrangea, a beautiful flower with a long blooming period and large flower clusters that look like embroidered balls after blooming, is welcomed and loved by a wide range of people. Growing hydrangeas in pots at home does look quite nice, but compared to keeping them in a vase, it falls short by quite a bit. So how do you keep hydrangeas in a vase? What do you need to pay attention to after putting them in a vase? On this topic
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How do you prune and shape English ivy? Four shapes, each with a different level of difficulty
In terms of growth rate, English ivy is a relatively slow-growing plant, so many people think there is no need to prune it. This idea is actually wrong. Pruning not only makes English ivy more beautiful, but also benefits its growth. So how do you prune English ivy? How do you shape English ivy? Let the editor tell you the answers
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