不同氮素水平对菠菜生长和品质的影响.pdf

2 2
1
3
2
1
3
1 1
1
南京农业大学学报 2005, 28 (3) : 126~128

Journal of N anjing Agricultural U niversity
不同氮素水平对菠菜生长和品质的影响
孙兴祥, 王健, 周毅, 沈其荣
(南京农业大学资源与环境科学学院, 江苏南京 210095)
摘要: 通过水培试验研究了不同氮素水平(5、10、15和 20 mmol· L - 1 ) 对 4个菠菜品种生物量以及植株不同部位硝酸
盐、可溶性糖含量的影响。结果表明, 从生物量来看, 15 mmol· L - 1是菠菜生长的最佳氮浓度。菠菜的硝酸盐含量随氮
素水平的提高呈递增趋势, 而可溶性糖含量则随氮素水平的提高呈递减趋势, 表明适当的供氮水平有利于提高菠菜的品
质。
关键词: 氮素水平; 菠菜; 硝酸盐含量; 可溶性糖
中图分类号: S6236 1; S311 文1献标1识码: A 文章编号: 1000 2030 (2005) 03 0126 03
Effects of different n itrogen levels on the growth and quality of spinach
SUN Xing xiang, WANG J ian, ZHOU Yi, SHEN Q i rong
(College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China)
Abstract: Hydroponical experiment was carried out to study the effects of different nitrogen levels (5, 10, 15, 20 mmol· L - 1 )
on biomass, nitrate and soluble sugar contents in different parts in sp inach (Spinacia oleracea). The op timal nitrogen level for
sp inach growth was 15 mmol· L - 1. The content of nitrate increased with the increasing of nitrogen levels, while soluble sugar de
creased, which indicated that p roper nitrogen management could imp rove the quality of sp inach.
Key words: nitrogen level; sp inach; nitrate conte3 nt; soluble sugar
人体摄入的硝酸盐有 87%来自蔬菜, 尤其是叶菜类蔬菜[ 1 ] , 且蔬菜体内硝酸盐含量与外源硝酸盐
浓度相关。菠菜(Spinacia oleracea) 是一种富含硝酸盐的叶菜类蔬菜, 既能使菠菜生长良好又能使其体
内硝酸