亚硫酸铵制浆造纸黑液对土壤性状及白菜产量品质的影响

通过白菜盆栽试验及野外调查分析,研究了亚硫酸铵制浆造纸黑液对土壤性状及白菜产量、品质的影响。结果表明,造纸黑液适量施用能改善土壤物理性状,增加土壤有机质含量和氮、钾含量;造纸黑液在相当于一般氮肥施用量的情况下施用,会提高白菜的生物产量及Vc含量,而且重金属汞含量不超过国家食品卫生标准。

Influences of Black Liquor of Papermaking with Ammonium Sulfite Pulp on Soil Properties and Cabbage's Output and Quality

This paper makes a study on the influences of black liquor of papermaking with ammonium sulfite pulp on the properties and cabbage's output and quality based on the cabbage's pot experiments and field investigation. Results show that the proper application of black liquor of papermaking can improve the soil properties and increase the contents of organic materials, N and K in soil. It also shows that the application of the black liquor amounting to the common nitrogenous fertilizer can increase the biological output and the content of Vc in cabbage, meanwhile the content of Hg in cabbage is not over the national health standards of food.