全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

不同时期施铁对水稻根表铁胶膜中铁镉含量及根系含镉量的影响

Keywords: 根表铁胶膜,镉污染土壤,水稻生育时期,吸镉量

Full-Text   Cite this paper   Add to My Lib

Abstract:

采用镉污染土壤-河砂-营养液联合培养的方法,研究了不同时期施铁对水稻根表铁胶膜中铁、镉含量的影响。选择水稻的分蘖、拔节、孕穗和灌浆4个时期,进行分期和各生育时期都施加铁的处理,在每个处理时期,设4个亚铁(Fe2+)水平分别为0、30、50和70mg·L-1,研究根表施铁浓度与水稻根表铁胶膜数量和吸附镉量之间的关系。结果表明,生长过程中取样测定的水稻根表铁胶膜铁含量,除个别处理外,都表现为施加铁的根表铁胶膜铁含量高于未施加铁的根表铁胶膜铁含量,尤其是孕穗期,随着施铁量的增加根表铁胶膜铁含量增加。成熟时测定,灌浆期处理的水稻根表铁胶膜铁的含量变化比较大,分蘖期和拔节期变化比较小。各生育时期都处理的根表铁胶膜铁含量以施加Fe2+50mg·L-1最高。水稻根系的含镉量,生长期间测定的结果是前期处理高于后期处理,而收获时测定的结果是前期和后期处理的根系含镉量趋于一致。各生育期都处理的根系含镉量以施加Fe2+50mg·L-1最高,与根表铁胶膜中含铁量相符。

References

[1]  王凯荣.镉对不同基因型水稻生长毒害影响的比较研究 [J].农村生态环境,1996,12(3):18- 23.
[2]  吴启堂,陈卢,王广寿.水稻不同品种对 Cd吸收累积的差异和机理研究 [J].生态学报,1999,19(1):104- 107.
[3]  王凯荣,龚惠群.两种基因型水稻对环境镉吸收与再分配差异性比较研究 [J].农业环境保护,1996,15(4):145- 149,176.
[4]  马朝红,曾德生.土壤中镉对水稻生长的影响 [J].湖北农业科学,1992,2:26- 30.
[5]  刘文菊,张西科,张福锁.根表铁氧化物和缺铁根分泌物对水稻吸收镉的影响 [J].土壤学报,1999,36(4):463- 468.
[6]  刘敏超,李花粉,夏立江,等.不同基因型水稻吸镉差异及其与根表铁胶膜的关系 [J].环境科学学报,2000,20(5):592- 596.
[7]  李花粉,郑志宇,张福锁,等.铁对小表吸收不同形态镉的影响[J].生态学报,1999,19(2):170- 173.
[8]  刘敏超,李花粉,夏立江,等.根表铁锰氧化物胶膜对不同品种水稻吸镉的影响 [J].生态学报,2001,21(4):598- 602.
[9]  Greipsson S and Crowder A A. Amelioration of copper and nickel toxicity by iron plaque on roots of rice(Oryza sativa)[J].Can J Bot,1992,70: 824- 830.
[10]  Kuo S.Concurrent sorption of phosphate and zinc, cadmium, or calcium by a hydrous ferric oxide[J].Soil Sci Soc Am J,1986,50:1412- 1419.
[11]  Marschner H,Romheld V and Kissel M. Different strategies in higher plants in mobilization and uptake of iron[J]. Journal of plant nutrition, 1986,9(3- 7):695- 713.
[12]  Peacock S and Rimmer D L. The suitability of an iron oxide- rich gypsum by- product as a soil amendment[J]. J Environ Qual,2000, 29:1969- 1975.
[13]  Rodecap K D,Tingey D T and Lee E H.Iron nutrition influence on cadmium accumulation by Arabidopsis thaliana (L.) heynh[J].J Environ Qual,1994,23:239- 246.
[14]  Romheld V and Marschner H. Evidence for a specific uptake system for iron phytosiderophores in roots of grasses[J]. Plant Physiol,1986,80: 175- 180.
[15]  Smolders A J P and Roelofs J G M.The roles of internal iron hydroxide precipitation, sulphide toxicity and oxidizing ability in the survival of Stratiotes aloides roots at different iron concentrations in sediment pore water[J].New phytol,1996,133:253- 260.
[16]  St- Cyr L and Growder A A. Iron oxide deposits on the roots of Phragmites australis related to the iron bound to carbonates in the soil[J]. Journal of plant nutrition,1988,11(6- 11):1253- 1261.
[17]  Taylor G J,Crowder A A and Rodden R. Formation and morphology of iron plaque on the roots of typha latifolial[J]. Grown in solution culture Amer J Bot,1984,71(5):666- 675.
[18]  Treeby M,Marschner H and Romheld V. Mobilization of iron and other micronutrient cations from a calcareous soil by plant- borne,microbial, and synthetic metal chelators[J].Plant and soil,1989,114:217- 226.
[19]  Xike Zhang, Fusuo Zhang and Daru Mao. Effect of iron plaque outside roots on nutrient uptake by rice (Oryza sativa L.):Phosphorus uptake[J].Plant and soil,1999,209:187- 192.
[20]  Xike Zhang, Fusuo Zhang and Daru Mao.Effect of iron plaque outside roots on nutrient uptake by rice (Oryza sariva L.).Zinc uptake by Fe- deficient rice[J].Plant and soil,1998,202:33- 39.
[21]  Ye Z H,Baker A J M,Wong M H and Willis A J. Copper and nickel uptake, accumulation and tolerance in Typha latifolia with and without iron plaque on the root surface[J].New Phytol,1997,136: 481- 488.
[22]  Zhang F S,Treeby M,Romheld V and Marschner H. Mobilization of iron by phytosiderophores as affected by other micronutrients[J].Plant and Soil,1991,130:173- 178.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133