不同栽培方式对籼、粳稻根表铁膜和根铁、镉含量的影响

摘要/Abstract

摘要： 在Cd污染土壤中研究淹水、覆膜、覆草和湿润栽培对籼、粳稻不同生育时期根表铁膜Fe、Cd含量和根Cd含量的影响.结果表明,在分蘖期,粳稻根表铁膜Fe含量和根Cd含量在4种栽培方式中平均为6.37和25.49mg·kg^-1,分别比籼稻的4.52和16.37mg·kg^-1增加1.85和9.12mg·kg^-1.在孕穗期,粳稻根表铁膜Fe、Cd含量和根Cd含量在4种栽培方式中平均为1.60、16.35和54.68mg·kg^-1,分别比籼稻的1.06、9.56kg和43.31mg·kg^-1增加0.54、6.79和11.37mg·kg^-1.在灌浆期,粳稻根表铁膜Fe含量覆草和湿润栽培为0.89和1.00mg·g^-1,分别比籼稻的0.63和0.30mg·g^-1增加0.26和0.70mg·g^-1;粳稻根表铁膜Cd和根Cd含量在4种栽培方式中平均为15.23和73.68mg·kg^-1,分别比籼稻的3.46和52.38mg·kg^-1增加11.77和21.30mg·kg^-1.收获时,根表铁膜Fe含量淹水栽培的籼稻为1.21mg·g^-1,比粳稻的0.65mg·g^-1增加0.56mg·g^-1,覆草栽培的粳稻为0.94mg·g^-1,比籼稻0.55mg·g^-1增加0.39mg·g^-1;根表铁膜Cd含量湿润栽培的粳稻为7.96mg·kg^-1,比籼稻的5.09mg·kg^-1增加2.87mg·kg^-1;根Cd含量粳稻在4种栽培方式中平均为54.53 mg·kg^-1,比籼稻的35.91 mg·kg^-1增加18.62 mg·kg^-1.

关键词: 栽培方式, 籼稻, 粳稻, 根表铁膜, 镉污染土壤

Abstract: The effects of different cultivation practices-traditional flooding (TF), film mulching (FM), straw mulching (SM), and wetting cultivation (WC)-on Cd-concentrations in Indica and Japonica roots and on Cd and Fe concentrations in iron plaque outside the roots were studied at different growth stages (tillering, booting, filling and harvest) with a Cd polluted soil. The results showed that in all practices, the mean Fe concentration in iron plaque and the mean Cd concentration in roots of Japonica at tillering stage were 6.37 mg穖g^-1 and 25.49 mg穔g^-1, and greater than those of Indica, which were 4.52 mg穖g^-1 and 16.37 mg穔g^-1 respectively ; at booting stage, the mean Fe and Cd concentrations in iron plaque and the mean Cd concentrations of Japonica were 1.60,16.35 and 54.68 mg穔g^-1, and greater than those of Indica, which were 1.06 mg穖g^-1, 9.56 and 43.31 mg穔g^-1, respectively; at filling stage, the Fe concentrations in iron plaque of Japonica in SM and WC were 0.89 and 1.00 mg穖g^-1, and those of Indica were 0.63 and 0.30 mg穖g^-1 ; in all practices, the mean Cd concentrations in iron plaque and root of Japonica were 15.23 and 73.68 mg穔g^-1, and those of Indica were 3.46 and 52.38 mg穔g^-1 ; at harvest stage, the Fe concentration in iron plaque of Indica in TFwas 1.21 mg穖g^-1 and that of Japonica was 0.65 mg穖g^-1, but that of Japonica in SM was 0.94 mg穖g^-1 and that of Indica in SM was 0.55 mg穖g^-1 ; the Cd concentration in iron plaque of Japonica in WC was 7.96 mg穔g^-1,and that of Indica was 5.09 mg穔g^-1 ;the mean Cd concentration in root of Japonica was 54.53 mg穔g^-1 and that of Indica was 35.91 mg穔g^-1 in all practices.

Key words: Cultivation practices, Indica, Japonica, Iron plaque outside roots, Cd-polluted soil

中图分类号:

史锟, 张福锁, 刘学军, 张旭东. 不同栽培方式对籼、粳稻根表铁膜和根铁、镉含量的影响[J]. 应用生态学报, 2003, (8): 1273-1277.

SHI Kun, ZHANG Fusuo, LIU Xuejun, ZHANG Xudong. Effect of different cultivation practices on Fe and Cd content in iron plaque outside rice root and Cd content in rice root[J]. Chinese Journal of Applied Ecology, 2003, (8): 1273-1277.

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