The yellow mealworm is not only rich in protein, fat, polysaccharid and other organic macromolecular nutrients, but also rich in phosphorus, potassium, iron, sodium, aluminum and other trace elements. For every 100g of the yellow mealworm larvae, the protein content of dry powder is between 48% and 54%, the fat content is between 28% and 41%, and the contents of vitamin E, B1 and B2 are also high. Therefore, the yellow mealworm can provide high quality protein for animal.
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Breeding Techniques for Seedlings of Eucalyptus urophylla, an Excellent Eucalyptus Species
1 Seedlings, such as Eucalyptus urophylla, tend to afforest and bloom in the year when they are afforested. Afforestation with seedlings and seed sources are widespread, and random seed production will inevitably lead to uneven growth and differentiation. Collect qualified seeds from the seed park or mother forest of the forest farm, and provide the cloned mother plant, and provide the plant with uniform channels, so as to avoid the influence and loss caused by the inferior seed. 2 Seeding period for sowing and seedling management is selected from November to March, and the seeding period for clone seedlings is from February to May or September to October. Due to frequent cold air intrusion from December to March, intermittent weather below 15°C occurs. The temperature difference between day and night reaches 10-15°C. There are often dry and dry hot winds from March to May, and the fall drought often occurs from September to October. To avoid harm, winter seeding and spring sowing are carried out. Attention should be paid to cold-cold-tail warm-headed sowing, which generally adopts film covering and warm sheds, high-temperature dry heat to cover the shade net, and strengthens the water-spraying management, and strives to maintain a suitable environment of 20-35°C and moist, and implement root-cut nursery at the nursery. The local soil N, K content is rich, relatively lack of P, forest humus soil texture is better and widely distributed. In order to nurse the seedlings in the temporary nursery, on the basis of the site selection and soil disinfection of the nursery, it was emphasized that the seedbed surface should be covered with 1.0 cm thick yellow heart soil, and the container matrix should be 50%-60% forest humus + 20% fire earth + 20 %～30% yellow heart soil and 0.5% superphosphate or compound fertilizer. 3 Seedling grade seedlings and nursery seedlings have 3 to 4 pairs of true leaves, more than 3 cm in height, robust growth, well-developed root systems, and grade I and II qualified seedlings without branching and disease and pests, and can be achieved through short-term cultivation. The required seedlings were divided into batches for cup-transplantation and eliminated unqualified seedlings. After the seedlings are grown, they are graded according to the standard deviations of height and diameter. When the seedlings of the same batch are sown and transplanted, the III and IV grade seedlings whose seedling height and ground diameter are one standard deviation lower than the average value should be eliminated. . The qualified seedlings generally have a growth period of 2.5 to 3.5 months, a height of 25 to 30 cm, a ratio of height to height of ≥ 1 %, and robust roots, stems, leaves and buds. There are no loose cups and mechanical damage. Grade III and Grade IV seedlings may reach the above height and diameter even though they are extended during the cultivation period, but they should not be used. Clonal seedlings are not subject to this restriction. 4 Seedlings Under normal nursery conditions, nursery stocks are graded according to the above criteria. Normal III and IV seedlings account for 15% to 20% of the seedlings. Therefore, calculate the number of seedlings (the number of seedlings used) = the number of seedlings + 15 % - 20 % of seedlings + 3 % - 5 % of supplementary seedlings will be calculated according to afforestation area and density. That is to say, there must be 20% to 25% of pre-emerged seedlings, so that they can select the best seedlings among them, and they should rather not be inferior to them, avoid the use of external seedlings and reduce the impact of seedling differentiation. Cultivate enough pre-plantlets to meet the needs of classifying the seedlings and the nursery, and the area where the tail leafhopper grows reaches 95% to 97%.