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Key Technical Points for Fertilization in the Production of Pollution-Free Fruit
1. The use of organic fertilizers, commercial organic fertilizers, and microbial fertilizers is encouraged. On the premise that chlorine-containing compound fertilizers and nitrate nitrogen fertilizers are prohibited, chemical fertilizers are permitted to be used according to the following two principles. (1) Chemical fertilizers must be applied in combination with organic fertilizers, and the amount of inorganic nitrogen applied should not exceed the amount of organic nitrogen used. (2) Chemical fertilizers may also be applied in combination with organic fertilizers and compound microbial fertilizers, with the formula being 1000 kg of barnyard manure, 5-10 kg of urea or 20 kg of diammonium phosphate, and 60 kg of compound microbial fertilizer; the final topdressing must be carried out 30 days before charging.
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How to Prevent Cold Damage in Rice? Detailed Explanation of Fertilization Measures
Fertilization case: In 2006, in rice-growing areas such as Shangzhi City, Heilongjiang Province, during the early stage of rice growth, some rice seedlings encountered low-temperature weather below 17°C, and rice cold damage problems of varying degrees occurred. In the rice-growing areas of Ningxia and Zhangjiakou, Hebei in the northwest region, in autumn during the late stage of rice growth, just at the grain-filling stage, the temperature suddenly dropped below 20°C, causing rice to suffer cold damage, which was very unfavorable for grain filling, and the seed-setting rate decreased by 10-20%, with severe cases decreasing by more than 50%. Expert comments: In northern rice-growing areas, in order to defend against the cold damage problems brought to rice production by low-temperature weather
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Detailed Explanation of Key Fertilization Techniques for Lilies and Roses
Ms. Xi from Quanjiao, Anhui, asks: I grow lilies for their bulbs. How should I fertilize them to achieve high quality and high yield? Expert: Lilies are perennial plants and should be given heavy applications of organic fertilizer. The seedling stage is relatively long, so organic fertilizer should be the mainstay, reasonably combined with nitrogen, phosphorus and potassium chemical fertilizers. First, choose a sandy loam soil with deep soil layers and good drainage. Before planting, in conjunction with deep plowing and soil preparation, apply 2000-3000 kg of decomposed organic fertilizer, 10 kg of urea, 20-30 kg of superphosphate, and 10-15 kg of potash fertilizer per mu. Topdressing is divided into three applications, applied in conjunction with shallow plowing and weeding
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Key Technical Points for Foliar Fertilization of Cotton to Prevent Premature Senescence
In the late growth stage of cotton, root activity gradually declines and the ability to absorb water and nutrients weakens accordingly. Adopting the method of spraying fertilizer solution promotes the absorption and utilization of nutrients by cotton, extends the functional period of leaves, improves root activity, and increases boll weight. As for the concentration of the fertilizer solution, urea is best at 1%, adding 0.5 kg of urea to 50 kg of water; potassium dihydrogen phosphate and superphosphate are best at 1%-1.5%. Superphosphate should first be soaked for 24 hours; after the impurities settle, slowly pour out the clear liquid, dilute with water, and then spray. At the same time, Tianfengsu or Shuofeng 481 may be appropriately added, which can
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The key "three waterings and three fertilizations" technical points for garlic cultivation
Water and fertilizer management after garlic turns green is the key to a bumper garlic harvest. As the weather warms up, water and fertilizer uptake gradually increases after greening, especially during the bolt-bearing stage and the bulb swelling stage, which are the peak periods of water and fertilizer demand for garlic. Therefore, throughout the entire growth period of garlic, timely watering and topdressing should be carried out according to soil moisture conditions and soil fertility and seedling conditions, with special emphasis on doing well the "three waterings" and "three fertilizations." 1. Water the greening water well and apply the greening fertilizer well. By the Spring Equinox, the garlic seedlings begin to turn green and grow. Because the early spring soil temperature is low, it is best to water the greening water at noon
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Key Technical Points for Pest Control and Fertilization of Wheat in Winter and Early Spring
When temperatures are relatively low in winter and early spring, pest control and fertilization in wheat fields should pay attention to the following two points: For pest control, to control wheat aphids, red spiders and other pests, spraying omethoate is more effective than dimethoate. This is because the insecticidal efficacy of dimethoate against pests decreases significantly as the temperature drops, while the efficacy of omethoate is less affected by temperature and can exert normal insecticidal action at temperatures below 15°C. Similar to omethoate is fenvalerate; the toxic efficacy of fenvalerate at 15°C is instead stronger than at 25°C. Fertilization: For topdressing, applying ammonium bicarbonate is better than urea. Ammonium bicarbonate
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Shallow water warming for rice to promote tillering, fertilization with "two preventions" to grow strong seedlings
Due to the impact of unfavorable weather conditions such as low temperatures, frequent rain and insufficient sunlight, rice has been slow to turn green, with yellow leaves, few tillers and delayed growth. For this reason, rice expert Xu Yirong, after an on-site inspection in the Heilongjiang reclamation area, proposed countermeasures such as shallow water warming to promote tillering, fertilization with "two preventions" to grow strong seedlings, and fitness-based disease prevention. First, water layer management must be done well: deep water is a heat-preservation measure, shallow water is a warming measure, and not establishing a water layer is a cooling measure. For plots with deep water formed by rainfall, drainage must be carried out promptly to raise temperature, promote root growth and promote
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Key Points of Cotton Fertilization Technology in the Huang-Huai-Hai Region
1. Main existing problems. In the Huang-Huai-Hai cotton region, nitrogen and phosphorus fertilizer application rates are generally too high, while organic fertilizer application is insufficient; basal fertilizer rates are too high, while topdressing rates are insufficient; deficiencies in the trace elements boron and zinc are relatively common. 2. Fertilization principles. (1) Increase organic fertilizer application and advocate combining organic and inorganic fertilizers. (2) According to soil fertility conditions, appropriately reduce nitrogen and phosphorus fertilizer rates, apply potassium fertilizer reasonably, and pay attention to the combined application of boron and zinc. (3) Apply nitrogen fertilizer in split applications, appropriately increasing the proportion of nitrogen fertilizer applied in the middle growth stage. (4) Fertilizer application should be combined with high-yield and high-quality cultivation techniques.
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What to do about cotton bud and boll shedding? Scientific fertilization can reduce it
The incoordination between the vegetative growth (growth of roots, stems and leaves) and reproductive growth (growth of buds, bolls and lint) of cotton causes an imbalance in the supply, transport and distribution of photosynthetic products within the cotton plant, which is an important cause of cotton bud and boll shedding. Through comprehensive measures centered on fertilization, controlling cotton growth is an important means of reducing cotton bud and boll shedding. Practice has proved that controlling stem and leaf growth in the early stage of cotton, building a good high-yield framework in the middle stage so that it grows steadily, and preventing premature senescence in the late stage are effective ways to reduce shedding of middle and lower buds and bolls. Therefore, in addition to rational close planting and strengthened water
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How to fertilize cotton for high yields? Scientific fertilization methods shared
In cotton cultivation, it is common that plenty of fertilizer is applied, yet cotton yields decline instead. This is because farmers do not understand the fertilizer requirements of cotton and fertilize irrationally, which not only wastes fertilizer but also causes low cotton yields and poor quality. Cotton farmers should grasp the following key points in fertilization: 1. Choose the right fertilizer types: on the basis of applying nitrogen fertilizer well, increase the amount of phosphorus and potassium fertilizer to enhance cotton's disease resistance, prevent premature aging in the late stage, and increase cotton yields. 2. Determine a reasonable fertilization amount: it is best to combine this with soil testing and formula fertilization technology,
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