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What are the key technical points for field tillage and preparation for machine-transplanted rice?
For machine-transplanted rice fields, different tillage and preparation methods should be adopted according to the cropping sequence, soil characteristics and other conditions, and base fertilizer should be applied according to local conditions based on soil fertility. Tillage and preparation of fields following a previous crop: 1. Crushing the straw of the previous crop. When the previous crop is harvested, the straw must be crushed and evenly spread. If crushing was not carried out during mechanical harvesting, an additional straw-crushing operation should be added or the straw should be removed from the field. 2. Dry tillage. Under suitable soil moisture and water content conditions, three methods can be used to kill stubble: forward (reverse) rotary tillage, shallow plowing and harrowing of stubble, among which the reverse rotary stubble-killing method
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How Is Rice Bred? A Detailed Explanation of Methods and Technical Key Points
In the process of hybrid rice breeding, the sterility of the rice male sterile line is affected by photoperiod-sensitive factors. The male sterile line generally shows sterility under the long daylight of April to September, while it shows fertility under the short daylight of September to April of the following year. Therefore, "two-line hybrid rice breeding" can increase yield by more than 20% compared with "three-line hybrid rice breeding", and it also overcomes the problems of a single source of male sterile cytoplasm and the relatively large limitation in the use of heterosis. The gene compatibility between indica and japonica subspecies is determined by their compatibility substances.
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How to Raise Adult Turtles? Detailed Explanation of Feeding Methods and Technical Key Points
The area of an adult turtle pond should preferably be 100 sq m, and about 10 juvenile turtles can be stocked per sq m. The pond water for adult turtles should be kept light green (transparency of about 30 cm). If the transparency is too high, the turtles will feel insecure; if the transparency is too low, the water will be brownish green, the water quality will be too fertile, and it will easily cause eutrophication, which is also bad for raising turtles. The feeding method for adult turtles varies by season. In spring and autumn, when the water temperature is low, adult turtles do not come out much in the early morning or evening, so they should be fed at 10 a.m.; in midsummer
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Technical key points for raising growing pigs well in summer and autumn
Piglets are weaned at 3-6 weeks of age and kept in the nursery house for 4 weeks. When body weight is 20-50 kg, because bone and muscle growth is relatively fast, they are called growing pigs. At this stage, the protein level is 16% and the lysine content is 0.8%. At 50-110 kg, adipose tissue is deposited in large amounts, so the protein and lysine levels can be appropriately reduced to 14% and 0.65% respectively. Ordinary pig farmers are accustomed to using concentrate or premix combined with corn, bran and other raw materials for feeding, but attention should be paid to the fact that the premix produced by some manufacturers is not up to standard, resulting in pigs
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Practical technical points for heatstroke prevention and cooling in summer chicken raising
The most suitable temperature for laying hen production is 17°C to 28°C, and the temperature range with little effect on production is roughly 7°C to 27°C. When summer temperatures in Shandong generally exceed 35°C, chickens will faint, and when they reach 40°C, chickens will die. Experiments have shown that when the temperature inside the chicken house reaches above 30°C, rooster sperm decreases, hen sexual maturity is delayed, the fertilization rate drops by 60%, and laying by laying hens generally declines. At the same time, due to a drop in blood calcium and an imbalance in acid-base balance, other diseases are easily induced, such as E. coli and mycoplasma disease. Because broiler chickens are large in body size, prone to fat
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How to choose land and make beds for Asarum planting? Detailed explanation of key technical points
Asarum seedlings have weak emergence ability and strict soil requirements, so understory humus soil is mostly chosen as the seedling field. Humus soil is moist, well structured, and highly aerated, suitable for Asarum seedling growth. Generally, when raising seedlings on humus soil, the emergence rate can reach more than 90%. Farmland soil should not be used for Asarum seedling cultivation; the physical and chemical properties of farmland soil are inferior to humus soil, it is prone to compaction, seedlings are not easy to emerge after sowing, sprouts are prone to drying, and even if they emerge, growth is not easily robust. The specifications of the seedling field beds and the requirements for light transmittance are the same as those of the seed field. The seedling beds should be prepared before
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Detailed Explanation of Sexual Propagation Methods and Technical Key Points for Asarum
For sexual propagation, both drilling and broadcasting can be used, with broadcasting being better. When seeds are freshly collected, the germination rate reaches 96%; after dry storage for 20 days it is 81%; for 40 days it is 29%; for 60 days it is only 2%. Therefore, after the seeds mature and are harvested in June-July, they should be sown immediately. If sowing cannot be done for some reason, mix 3 parts wet sand with 1 part seeds evenly, then bury them in a shaded place to maintain appropriate moisture, but sowing must not be later than the end of July; if too late, root growth will be affected. About 5 kg of fresh seeds are needed per mu. Broadcasting: forest intercropping seedling raising mostly uses broadcasting. Because its soil is loose and fertile,
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Control Methods and Technical Key Points for Angelica Root Rot
Angelica root rot, also known as root decay disease, is one of the main diseases during the growth and development period of angelica (Angelica sinensis), greatly affecting its yield and quality. 1. Damage symptoms: It harms roots and stems. The root tissue of affected plants initially turns brown, then rots into a water-soaked state, leaving only a fibrous hollow shell. The stem becomes brown and water-soaked, aboveground growth stops, and the plant becomes stunted. Elliptical brown patches appear on the leaves; in severe cases, the leaves wither, turn yellow, droop, and even the entire plant dies. 2. Pathogen: (Fusarium avenaceum (
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Key Technical Points for High-Yield and High-Efficiency Off-Season Cultivation of Oyster Mushrooms
Oyster mushrooms can be cultivated all year round, but those cultivated in the high-temperature season yield the highest returns. The reasons: First, high summer temperatures make cultivation technically difficult, and pests and diseases occur easily, often leading to cultivation failure. Second, the total cultivation area of oyster mushrooms in summer decreases, and total output is small, causing a shortage of fresh oyster mushrooms@#@125@#@ on the market and driving prices up. Based on years of cultivation practice at our edible fungi research center, as long as the key technical points are grasped and some necessary scientific management methods are adopted, oyster mushroom cultivation can still achieve high yield and high efficiency. The key cultivation and management technical points are introduced below:
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Key Technical Points for Winter Management of Agaricus bisporus
In the Yangtze River basin and the northern provinces, such as Shanghai, Zhejiang, Jiangsu, Sichuan, Anhui and other provinces and municipalities as well as the Northeast region, because of the cold winter, the temperature in the mushroom houses is all below 5°C, which is not suitable for mycelial growth; the mycelium is in a dormant state and cannot supply the nutrients needed for fruiting body growth, therefore, mushrooms will not grow either. Generally from late December to early March of the following year, the mushrooms are in the overwintering stage. Doing a good job of overwintering management is a necessary condition for obtaining a high yield of spring mushrooms. (1) Preparatory work before overwintering ① After the autumn mushroom harvest ends, first of all, do a good job of tidying the bed surface
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