沼肥综合施肥模式对小白菜产量及硝酸盐含量的影响

通过一年3茬小白菜(Brassica chinensis)田间试验,研究了4种不同施肥模式(即不施肥、施纯化肥、化肥和猪粪配合施用(其中化肥N占80％,有机肥N占20％)、化肥和沼肥配合施用(其中化肥N占80％,有机肥N占20％)对小白菜产量及硝酸盐含量的影响.结果表明,与不施肥(对照)相比,20％的沼肥综合施肥模式(即化肥和沼肥配合施用)可极显著提高小白菜的生物学产量,增产(165.13±2.63)％,与其他施肥模式相比,小白菜产量差异不显著;与施用纯化肥相比,极显著地降低了硝酸盐的积累.因此,沼肥综合施肥模式可以在武汉地区的小白菜生产中加以推广应用.

Effects of Fertilization Modes of Biogas Manure on Yield and Nitrate Content of Brassica chinensis

Through field trials of three-stubble Brassica chinensis in one year,effects of 4 fertilization modes,i.e.no fertilizer,chemical fertilizer applied as base manure,chemical fertilizer applied half as base manure and half as additional pig manure,applying chemical fertilizer(80%) and biogas manure(20%),on yield and nitrate content of B.chinensis were studied.Results showed that compared with the control treatment,biogas manure could increase the yield of B.chinensis by(165.13±2.63)%(P<0.05) but has no difference with other models(P>0.05);while compared with the chemical fertilizer applied,it could decrease the concentration of nitrate thus worth being popularized in future vegetable production in Wuhan.