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叶类蔬菜的硝态氮累积及成因研究
引用本文:王朝辉,田霄鸿,李生秀.叶类蔬菜的硝态氮累积及成因研究[J].生态学报,2001,21(7):1136-1141.
作者姓名:王朝辉  田霄鸿  李生秀
作者单位:西北农林科技大学资源环境学院
基金项目:国家重点基础研究专项经费资助(G1999011707);国家自然科学基金(49890330,39970429,30070429)、杨凌科技开发基金资助项目
摘    要:在菜园土壤上进行的田间试验,用禾谷类作物冬小麦作比较,研究了菠菜、小白菜、大青菜和油菜等叶类蔬菜累积硝态氮的特点,结果表明:硝态氮累积是一般早作作物的共性,苗期更为明显,无论蔬菜还是冬小麦均有较高的硝态氮含量(367.8-1413.4μg/g);但随生育期后延,蔬菜的硝态氮含量波动升高,冬小麦波动降低,盆栽试验表明,施入土壤的氮肥是蔬菜硝态氮累积的主要来源,过量施用氮肥所导致的蔬菜硝态氮吸收与还原转化不平衡是产生累积的根本原因,吸收与生长不协调更使累积过程加剧。

关 键 词:叶类蔬菜  硝态氮累积  成因
文章编号:1000-0933(2001)07-1136-06
收稿时间:1999/9/11 0:00:00
修稿时间:2000/2/10 0:00:00

The cause of nitrate accumulation in leafy vegetables
WANG Zhaohui,TIAN Xiaohong and LI Shengxiu.The cause of nitrate accumulation in leafy vegetables[J].Acta Ecologica Sinica,2001,21(7):1136-1141.
Authors:WANG Zhaohui  TIAN Xiaohong and LI Shengxiu
Institution:College of resources and Environmental Sciences; Northwestern Science and Technology University of Agriculture and Forestry; Yangling; Shaanxi; China
Abstract:Field and pot experiments were carried out to study nitrate accumulation in leafy vegetables.N application rates at 0,90,180,270kg N/hm 2 were used in the field experiments with Chinese cabbage(\%Brassica Chinensis var. Oleifera Makino et Nenoto),green cabbage(\%Brassica Chinensis \%L.),spinach(\%Spinacia oleracea\% L.)and repe(\%Brassica campestris\% L.)as vegetables,and winter wheat(\%Triticusp aestvum\% L.)as a comparison crop.and they were planted on a vegetable field.The N rates of 0,0.20,0.40,0....
Keywords:leafy vegetable  nitrate accumulation
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