史雅娟, 杨林书, 李国学. 沼气发酵残余物对减少叶菜硝酸盐积累的影响研究[J]. 中国生态农业学报(中英文), 2002, 10(4): 58-61.
引用本文: 史雅娟, 杨林书, 李国学. 沼气发酵残余物对减少叶菜硝酸盐积累的影响研究[J]. 中国生态农业学报(中英文), 2002, 10(4): 58-61.
SHI Ya-Juan, YANG Lin-Shu, LI Guo-Xue. Effect of anaerobic fermentation residues on nitrate accumulation in leaf vegetables[J]. Chinese Journal of Eco-Agriculture, 2002, 10(4): 58-61.
Citation: SHI Ya-Juan, YANG Lin-Shu, LI Guo-Xue. Effect of anaerobic fermentation residues on nitrate accumulation in leaf vegetables[J]. Chinese Journal of Eco-Agriculture, 2002, 10(4): 58-61.

沼气发酵残余物对减少叶菜硝酸盐积累的影响研究

Effect of anaerobic fermentation residues on nitrate accumulation in leaf vegetables

  • 摘要: 利用沼气发酵残余物(沼液、沼渣,以下简称沼肥)生产低硝酸盐蔬菜的可行性试验表明,与化肥相比,适量沼肥或沼肥与化肥配合施用,均可明显减少蔬菜体内硝酸盐的积累,等N量的全沼肥较沼肥与化肥配合施用控制效果更好。油菜喷施沼液比灌施降低硝酸盐含量,而菠菜喷施沼液反而比灌施提高硝酸盐含量。相同施肥量下油菜体内硝酸盐含量上等肥力土壤明显高于低等肥力土壤;沼肥或沼肥与化肥配施在高肥力土壤上减少硝酸盐积累的作用比低肥力土壤更明显。施用沼肥对减少大棚油菜积累硝酸盐的作用更明显,而对菠菜作用反之,露地菠菜减少硝酸盐积累的作用明显。

     

    Abstract: The experiments in pot culture and field are conducted to study the factors of anaerobic fermentation residues (AFR)on nitrate accumulation in leaf vegetables.The exploration of strategy in nitrate accumulation aims at supporting the improvement of energy-environment engineering and the production of safe food.The results show that compared to chemical fertilizer,AFR can decrease the nitrate accumulation in rape and spinach;nitrate content in plant tissue is increased with the increase of percentage of chemical nitrogen in the mixture of chemical fertilizer and AFR.Comparing spraying dressing digested slurry with irrigation,spraying method can reduce the nitrate content of rape,however,a reverse result is found in spinach.The nitrate accumulation in rape affected by AFR has more apparent effect in high fertility soil than that in low one,and the regulation effect is more effectively in high fertility soil.To regulate the nitrate accumulation in plant has more apparent effect on rape under greenhouse cultivation and more apparent effect on spinach under open—air cultivation.

     

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