Rescue method of trichloroacetaldehyde poisoning in rice seedlings

Phosphate fertilizer contains trichloroacetaldehyde and trichloroacetic acid. Excessive application of phosphate fertilizer in the process of raising rice seedlings, or application of inferior phosphate fertilizer with high content of trichloroacetaldehyde (acid), rice seedlings may be poisoned by trichloroacetaldehyde (acid). When the seedling was slightly damaged, the leaves of the seedlings curled and shrunk, the tillers were clustered, and the leaf tip appeared brown necrotic stripes; if the damage was heavy, the stripes developed from the leaf tip to the middle and base of the leaves, the tillers decreased or stopped, and the roots were abnormally thick and short, and even rotted and blackened, resulting in the death of the whole plant. The fields with less damage to seedlings should be irrigated daily and drained at night, washed repeatedly with water until the symptoms of seedling poisoning no longer developed, and then properly supplemented with nitrogen, phosphorus and potassium fertilizer to promote the recovery of seedlings. After washing with water, the fields with serious seedling damage should be kept in the shallow water layer, 30 kg of ammonium bicarbonate per mu and 20 kg of moist fine soil should be sprinkled in dew, and then transferred to normal management after natural drying. This method can make the soil solution in the field slightly alkaline and promote the decomposition of chloral and lose its toxicity. After detoxification, 100 ml of Huimanfeng per mu, or 5 grams of green fertilizer, or 100 ml of Century Nongfeng (any one can be chosen), 50 kg of water and 60 kg of water can be sprayed to promote the growth of seedlings.