Is there any good way to whiten rice seedlings?

There are two kinds of albino rice seedlings. Sporadic, leaves are albino at birth, or partially banded albino, and all white seedlings mostly die in the three-leaf stage. The color of leaves turns from yellow to white, often starting from the tip of the leaf. At this time, if irrigation, fertilization and other measures are taken or the weather gets warmer, growth can be resumed.

Causes of albinism vaccine. The first is physiological genetic diseases caused by genetic factors. The characters of albino seedlings are controlled by recessive single gene and not affected by cytoplasm. Climatic factors, because seedlings are damaged by low temperature, generally due to low temperature, chlorophyll decomposes when the temperature is lower than 20℃, and chlorophyll cannot be formed when it is higher than 32℃, and the leaves are white. Caused by the decomposition of chlorophyll. It is caused by nutritional factors. The critical level of available zinc in soil suitable for rice growth is 0.05PPM, and the normal zinc content in rice plants is 20- 120PPM. If it is lower than this level, there will be symptoms of zinc deficiency. When rice is deficient in zinc, the main vein is not green, extending along the main vein to the leaf margin, mostly yellow and white, and finally the whole leaf is brown.

Technical measures of albinism vaccine. It is a hereditary albino seedling, which is rare and difficult to control after it appears. For albino seedlings caused by low temperature, one is irrigation protection; The second is to increase the application of effective nitrogen fertilizer to enhance the low temperature resistance of seedlings. Prevention and transformation measures of zinc-deficient seedlings: zinc sulfate is added as base fertilizer, and the general dosage is per mu 1kg, which is applied under or beside seeds, and the effect of surface application is poor, so it is avoided to mix with phosphate fertilizer. Thirdly, soaking the seeds in 1-2% zinc sulfate solution for 12 hours or spraying on the leaves at the three-leaf stage, 3-5 days before transplanting, 5-7 days after transplanting and15 days can eliminate the symptoms of zinc deficiency and improve the yield.

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