氮磷水平对于油麦菜产量及其硝酸盐积累的影响

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Effects of application rates of N,P fertilizer on yield and nitrate accumulation in lettuce

1.
Department of Environment Science, East China Normal University, Shanghai 200062, China;
2.
Institute of Agricultural Environment Resources, Yunnan Academy of Agricultural Sciences, Kunming 650205, China;
3.
Institute of Medicinal Plants, Yunnan Academy of Agricultural Sciences, Kunming 650231, China

摘要: 通过田间试验研究了不同氮磷水平对油麦菜产量和食用部分硝酸盐含量的影响.结果表明：氮磷投入量比高量施肥减少46.4%，油麦菜增产32.4%.适宜的氮磷投入量和施用比例是油麦菜高产的重要因素，油麦菜产量较高时氮的施用范围为180～270 kg·hm-2，磷的施用范围为125～190 kg·hm-2.油麦菜硝酸盐含量随氮素水平的提高呈递增趋势，适量磷素能够抑制硝酸盐的积累.
- 氮磷水平 /
- 油麦菜 /
- 硝酸盐含量 /
- 产量和品质
Abstract: An experiment was carried out on field to investigate the relationship between the yield, nitrate accumulation and N，P fertilization level in lettuce. The yield of lettuce increased 32.4%, when the rates of N and P were reduced to 46.4% of that in high fertilizer groups. N and P, applied in proper combinations, are important factors for high yield of lettuce. The optimal level of nitrogen for high lettuce yield was 180～270 kg·hm-2,and that of phosphorus was 125～190 kg·hm-2. The content of nitrate in lettuce increased with the increasing of nitrogen levels of fertilizers. Appropriate phosphorus levels could restrain nitrate accumulation of lettuce. Proper N，P combinations could improve the quality of lettuce and increase yield.
- N and P levellettucenitrate contentyield and quality /