Phosphorus contains trichloroacetaldehyde and trichloroacetic acid. Excessive application of P fertilizer in rice breeding, or application of poor quality P fertilizer with high content of trichloroacetaldehyde (acid), rice bran may be subject to chloral (acid) toxicity. In mild victimization, the leaf blades of the seedlings were atrophic and atrophic, with tillers and clumps, brown necrotic streak on the tip of the leaf; lesions were heavier, streak progressed from the tip of the leaf to the middle and base of the leaf, the tillering was reduced or stopped, and the root was abnormally short and even. It turned black and eventually killed the whole plant. The lightly-damaged plots of the seedlings immediately took the method of night-irrigation and washed repeatedly with water until the symptoms of seedling poisoning no longer developed, and then applied nitrogen, phosphorus, and potassium fertilizers appropriately to promote the recovery of the seedlings. The seedlings are heavier in the field, and after washing with water, the field is kept in a shallow water layer. 30 kg of ammonium bicarbonate per acre, 20 kg of moist fine soil, and then spread after dry dew, and then naturally dried and transferred to normal management. . This method can make the soil solution in the field slightly alkaline, promote the decomposition of trichloroacetaldehyde and lose its toxicity. After detoxification, 100ml of Huimanfeng per acre, or 5g of green manure, or 100ml of Xiangnongfeng (optional one), and 50-60kg of water added, can promote the growth of seedlings.
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