Nitrogen fertilizer applying method for reducing Hg content of rice grains in heavy mercury pollution type rice field

The invention relates to a nitrogen fertilizer applying method for reducing the Hg content of rice grains in a heavy mercury pollution type rice field and belongs to the technical field of the heavy metal pollution prevention technology for agricultural products. The method is characterized in that,...

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Bibliographic Details
Main Authors SUN CHENPENG, LIU JIANGUO, WANG MINGXIN
Format Patent
LanguageChinese
English
Published 15.02.2017
Subjects
AGRICULTURE
ANIMAL HUSBANDRY
CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPSOR SEAWEED
FERTILISING
FISHING
FORESTRY
HORTICULTURE
HUMAN NECESSITIES
HUNTING
PLANTING
SOWING
TRAPPING
WATERING
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Summary:The invention relates to a nitrogen fertilizer applying method for reducing the Hg content of rice grains in a heavy mercury pollution type rice field and belongs to the technical field of the heavy metal pollution prevention technology for agricultural products. The method is characterized in that, in a heavy mercury pollution type rice field (the Hg content of the soil in the rice field is 2mg/kg and is four times the concentration specified in a national standard), the total nitrogen application amount is 225 kg/hm2 (the nitrogen application level is counted in the content of pure nitrogen) and is applied in three steps. Firstly, a base fertilizer is applied three days before the transplantation of rice seedlings, and the nitrogen application amount of the base fertilizer is one half the total nitrogen application amount. Secondly, a tillering fertilizer is applied 30 days after the transplantation of rice seedlings and the nitrogen application amount of the tillering fertilizer is one fourth the total nit
Bibliography:Application Number: CN20161810737