生态与农村环境学报 ›› 2016, Vol. 32 ›› Issue (2): 315-319.doi: 10.11934/j.issn.1673-4831.2016.02.022

• 污染控制与修复 • 上一篇    下一篇

钾肥对铅污染土壤白菜生长及品质的效应

王小晶1,2, 陈怡1, 唐静1, 张晓玲1, 王菲1, 王正银1   

  1. 1. 西南大学资源环境学院, 重庆 400716;
    2. 重庆市北碚区农业委员会, 重庆 400700
  • 收稿日期:2015-05-04 出版日期:2016-03-25 发布日期:2016-04-01
  • 通讯作者: 王正银,E-mail:wang_zhengyin@163.com E-mail:wang_zhengyin@163.com
  • 作者简介:王小晶(1986-),女,安徽凤台人,农艺师,硕士,主要从事植物营养与品质方面的研究。E-mail:crystalprincess86@163.com
  • 基金资助:

    国家公益性行业(农业)科研专项(201203013-5);国际植物营养研究所(IPNI)资助项目(2012-Chongqing-02)

Effects of Potash Fertilizer on Cabbage Growth and Quality in Lead-Polluted Soil

WANG Xiao-jing1,2, CHEN Yi1, TANG Jing1, ZHANG Xiao-ling1, WANG Fei1, WANG Zheng-yin1   

  1. 1. College of Resources and Environmental Sciences, Southwest University, Chongqing 400716, China;
    2. Beibei Agriculture Committee, Chongqing 400700, China
  • Received:2015-05-04 Online:2016-03-25 Published:2016-04-01

摘要:

为阐明钾对铅污染土壤白菜生长品质及食用安全性的影响,通过盆栽试验研究2种浓度铅污染土壤下不同钾肥施用量对白菜生长、生理特性、重金属含量及食用品质的影响。结果表明,铅污染土壤增施钾肥白菜地上部和地下部生物量分别显著提高5.1%~30.0%和10.0%~33.3%(P<0.05)。铅污染土壤增施钾肥(100~400 mg·kg-1)可显著提高白菜叶绿素a含量(P<0.05),叶绿素b含量变化不明显。铅污染土壤增施钾肥能显著降低白菜中镉、铅、铬和砷含量(P<0.05),显著提高维生素C含量(P<0.05),显著降低硝酸盐含量(P<0.05),但对白菜还原糖含量的影响不一致。该试验条件下铅污染土壤白菜最佳施钾浓度为200~400 mg·kg-1

关键词: 铅, 钾肥, 白菜, 生理生长, 矿质品质

Abstract:

In order to further explain how potassium affects cabbage growing in lead contaminated soils in growth and quality, a pot experiment was carried out to study effects of dosages of potash fertilizer on yield, chlorophyll content, nutrition and mineral content of the cabbage growing in two soils different in lead contamination degree. Results show that after application of potash fertilizer the cabbage in the lead-contaminated soil increased by 5.1%-30.0% and 10.0%-33.3% in fresh weight of the above-ground part and the under-ground part, respectively(P<0.05). Application of potash fertilizer at a rate of 100-400 mg·kg-1 could increase the concentration of chlorophyll-a significantly(P<0.05), while that of chlorophyll-b did not show any constant changes. Potash fertilizer application was found to significantly decrease the concentration of Cd, Pb, Cr and Se(P<0.05), increase the concentration of vitamin C(P<0.05), decrease the concentration of nitrate(P<0.05), but did not have any constant effects on reducing the concentration of sugar. The findings in the study indicate that the optimal dosage of potash fertilizer is about 200-400 mg·kg-1 for cabbage in lead-stress soils.

Key words: lead, potash fertilizer, cabbage, physiological growth, mineral element content

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