不同有机肥种类及用量对芹菜产量和品质的影响

通过田间试验研究了不同有机肥品种及其用量对芹菜产量和品质的影响。结果表明：油枯、鸡粪、猪粪3种有机肥均能改善芹菜的外观形态和生理活性,从而提高芹菜的产量和改善其品质。在提高芹菜产量方面,其影响程度为鸡粪>油枯>猪粪;在增加芹菜Vc和可溶性糖含量方面,其影响程度为：鸡粪>猪粪>油枯。有机肥还能显著降低芹菜茎硝酸盐含量,其影响程度表现为：鸡粪>猪粪>油枯,但油枯和鸡粪处理芹菜硝酸盐含量均随着施肥水平的上升而上升,而猪粪处理则随着施肥水平的上升而下降。施用有机肥后,芹菜未产生重金属污染,其叶片和茎重金属含量均低于国家卫生标准,但其Zn、Cu含量随猪粪施用量的增加而增加,由此推断长期大量施用猪粪可能会造成芹菜Cu、Zn元素的污染。

Effect of Different Kinds and Dosage of Organic Manure on the Yield and Quality of Celery

The effect of different kinds and dosage of organic manure on the yield and quality of celery were studied by field test. The result showed, the growth, physiological activity, yield and quality of celery were improved by chicken excrement and pig dung significantly. On the increasing of yield, the chicken excrement > oil cake > pig dung. Vitamin C and soluble sugar of celery were increased by the threekinds of organic manure, its followed: chicken excrement>pig dung>oil cake. The nitrate content of celery were reduced significantly by the organic manure, its rang reached 7.1%-53.1%. The effect on nitrate content followed this order: chicken excrement>pig dung>oil cake. The nitrate content of celery increased followed the fertilized level of oil cake and chicken excrement, but the pig dung followed the contrary rule. Under these levels of the organic manure, the heavy metal elements of Pb, Cd, Cu, Zn in leaf and petiole of celery were significantly lowered the national standard. But the heavy metal elements of Cu, Zn in leaf were increased significantly with the increase of application of pig dung. These results suggested that the heavy metal elements of Cu, Zn would contaminate celery under the condition that application of abundant pig dung for long time.