通过大田番茄试验,进行了有机肥与无机肥不同配比施用对土壤NO3--N和NH4+-N含量以及番茄产量和品质的影响研究.结果表明,在施氮量相同的条件下,番茄各生育期土壤NO3--N和NH4+-N含量随无机N配施比例的增加而增加,变化动态相似.番茄拉秧期不同施肥处理土壤全N和有机C含量有明显变化,且均为高量有机肥配施处理＞低量有机肥配施处理＞化肥处理.有机氮与无机氮配施比例为3∶2,对土壤N素矿化与固持、土壤全N与有机C的提升以及增加番茄产量较为有利.番茄果实中可溶性糖、酸和维生素C含量的变化规律与肥料施用无相关性,可能是受番茄产量高低的影响.各处理的番茄果实硝酸盐含量随有机肥配施比例的增加而下降,番茄果实硝酸盐和亚硝酸盐含量均低于国家限量标准.%A field experiment was conducted to study the effect of chemical fertilizers application combine with manure with different combined rate on soil NO3--N and NH4+ -N as well as tomato yield and quality. The results in dicated that soil NO3 -N contents increased with chemical fertilizer contents increased. And soil NH4+ -N contents showed the similar tends. The total nitrogen and organic carbon contents in soil changed significantly at tomato har vest stage. The sequence from higher to lower was high manure fertilizer treatment, low manure fertilizer treatment and chemical fertilizer treatment. The mineralization and immobilization of soil nitrogen, total nitrogen, organic car bon and tomato yield get favorable effect when the combined rate of organic nitrogen and chemical nitrogen was 3:2. However,statistical results indicated there were no obvious relativity between the content of soluble sugar,or ganic acid and Vc in different fertilizer treatments. Which maybe impact by different tomato yields. The nitrate con tents in tomato fruits decreased with the increase of manure fertilizer ratio. The nitrate and nitrite concentrations in tomato fruits were lower than the Chinese standard in all the experiment treatments.
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