The late-maturity phenomenon of rice gluttony is due to improper selection of varieties or during the growth and development of rice, which is affected by some unfavorable factors, and the phenomenon that does not match with the normal growth of cultivation targets appears, which seriously affects the yield and quality of rice.
I. Reasons for the late maturity of rice
1. Influenced by factors such as low temperature, cold damage and soil drought, resulting in the obstruction of normal growth and development, delay of reproductive growth, and the inability of nutrients to operate on reproductive growth on time.
2. Photosynthesis intensity and illumination time are not enough, but also increase the degree of greediness.
3, excessive amount of nitrogen fertilizer or application time is late, late growth of nutrients, but also prone to greed.
4, the population density is too large, poor ventilation and light conditions cause the stems and leaves too luxuriant, but also easy to produce bulging symptoms.
Second, the mitigation method
(I) Spraying foliar fertilizer and plant growth promoters to promote early maturing
1. Foliar application of potassium dihydrogen phosphate. For each 20 kilograms of water, 400g of potassium dihydrogen phosphate was added for foliar application, or 300g of potassium dihydrogen phosphate (300g) plus 100g of zinc sulphate per 20kg was added for foliar application.
2, foliar spray plant growth regulators.
3. Spraying time: After dew or after 10 o'clock in the morning, after 4 o'clock in the morning, it is necessary to spray on a sunny day without wind.
(b) Control of the water layer
The low-lying land should be drained in time, dry and wet management should be carried out, and the ground temperature and soil permeability should be increased so as to increase the temperature and increase the oxygen with water. Do not exceed 3 cm for the saline-alkaline water layer.
(3) Reasonable application of nitrogen fertilizer
Nitrogen fertilizers should be supplied in a timely manner according to the time and amount, and should not be too much to prevent overgrowth of plant nutrients and greediness. Http://
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