What should we pay attention to when spraying foliar fertilizer on rice?
Generally speaking, it is most suitable to spray early rice at the stage of big embryo, initial heading, grain filling and full heading, which takes more than an hour per mu. If spraying fertilizer is at the heading and flowering stage, it should be sprayed before flowering in the morning and after 4 p.m.
Processing liquid fertilizer all kinds of available nitrogen, phosphorus and potassium fertilizer, potassium dihydrogen phosphate, triacontanol, borax, silkworm manure and human and animal urine can be used as foliar fertilizer, which is not much per mu, but it should be processed into liquid fertilizer first. The day before the quick-acting chemical fertilizer was sprayed, it was dissolved with 5: 10 times water to prevent withered grass leaves from being sprayed. Human and animal urine should first be rotten in the pool, silkworm feces should be dissolved in 10 times water, filtered after 24 hours, and then sprayed on sufficient water; borax is broken first, fully stirred into a thick liquid with a small amount of water, and then sprayed on sufficient water.
According to the growth trend of grain seedlings, the fields with green leaves and neat heading were sprayed with phosphorus and potassium mixed fertilizer. 0.25 grams of urea, 0.5 kilograms of superphosphate, 0.25 kilograms of potassium chloride plus 60 kilograms of water per mu, or 2.5 kilograms of cooked bovine urine and 1 kilogram of superphosphate per mu to 60 kilograms of water. The fields with bluish yellow leaves, irregular growth and thin soil are mainly sprayed with nitrogen fertilizer and combined with nitrogen and phosphorus.
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Abnormal temperature and precaution against Rice Seedling Diseases
Seedling disease is the general name of a variety of physiological diseases and infectious diseases during the period of rice seedling cultivation, also known as seedling rot. Physiological rotten seedlings refer to the symptoms of rotten seeds, rotten buds, black roots, green wilt and yellow withered seedlings caused by adverse environmental conditions, while infectious rotten seedlings refer to the symptoms of dead seedlings caused by cotton rot and standing blight. The northern rice area is often attacked by low temperature and cold spell weather during the seedling raising period, and the annual incidence of rotten rice seedlings is 10% to 23%. Symptom characteristics-nbsp1, physiological rotten seedlings: 1. Rotten seed, which means that the seed has not been released.
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Peiza 67 (Rice)
In the basic situation, we used the low temperature sensitive genic male sterile line Peiai 64s and the self-selected high quality indica-japonica progeny line G67 (Copslo17/ milligram old / / Xinxiu 299) to select a new two-line hybrid rice combination Peiza 67 with high quality, high yield and high resistance. The characteristic Peiza 67 participated in the joint evaluation of two-line hybrid rice in Guangdong Province, and its yield was 6.84t/hm2, which was the same as that of Shanyou 63, and in 1996 and 1997, it participated in the joint regional test of hybrid rice, and the yield was 6.29 and 6 respectively.
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