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Narcissus Sprouting: How to Handle Non-Sprouting or Non-Flowering, and Delaying or Advancing Bloom
Narcissus is the tenth of China's top ten famous flowers. It also has beautiful names such as Flower in the Snow, Golden Cup and Silver Terrace, Fairy on the Waves, Fragrant Consort of the Fallen God, Li Lan, Elegant Guest, and Jade Exquisite. According to Huang Tingjian's "Rhyme-Matching Zhong Yu's Narcissus" from the Song Dynasty, the lines "Blooming by water alone is a wonder in itself, with water-agarwood as its bones and jade as its flesh" show that narcissus is very easy to grow.
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What should be noted when advancing the cotton sowing date?
Can the cotton sowing date really be advanced? Based on many years of cotton sowing practice, the lessons in this regard are very profound. It is true that using plastic film mulching for nutrient-pot seedling raising can also allow sowing in mid-to-late March and produce cotton seedlings in early April, and large-scale demonstrations have been carried out in production, but the result is that management is very difficult, and it is also hard to ensure full stands and strong seedlings. First, cold waves are frequent in early to mid-April, temperature fluctuations are large, north winds occur many times, and it is very difficult to judge when to uncover and cover the seedbed film; second, if continuous rainy weather occurs, it is difficult to ventilate the cotton seedlings on the seedbed, which very easily leads to spindly seedlings and causes cotton seedlings to lodge; third, low temperature and rain also easily induce diseases such as damping-off, anthracnose, and seedling blight, causing patches of dead seedlings in the seedbed; fourth, early sowing prolongs the seedling age of cotton seedlings, forcing them to be transplanted into the field too early. When early-transplanted cotton seedlings encounter cold waves, missing plants and broken rows often result from dead seedlings, generally 10%-20% missing plants, and in severe cases 30%-50% missing plants. In recent years, many new varieties have been introduced in cotton production, especially hybrid insect-resistant cotton, which is relatively expensive. If the area of missing plants is too large, it will not only cause economic losses, but also make it difficult to achieve one sowing, one transplanting, and one full stand of cotton. The planned cotton field area often cannot be realized, and it is even harder to ensure that excellent cotton seed is planted to achieve a high and bumper harvest.
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Advancing Scientific Soil-free Vegetable Cultivation: Aeroponics
Advancing Scientific Soil-free Vegetable Cultivation: Aeroponics
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