| 铅胁迫对小麦生长发育的影响 |
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| 引用本文： | 杨生龙,康建宏,吴宏亮.铅胁迫对小麦生长发育的影响[J].安徽农业科学,2010,38(36):20576-20578. |
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| 作者姓名： | 杨生龙 康建宏 吴宏亮 |
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| 作者单位： | 宁夏农林科学院作物研究所,宁夏永宁,750105;宁夏大学农学院,宁夏银川,750021 |
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| 摘 要： | 目的]探讨铅胁迫对小麦生长发育的影响。方法]采用盆栽试验,研究了不同浓度的铅胁迫对2个小麦品种(宁春13号和宁春4号)生长发育的影响。结果]随外源铅浓度的增加,2个小麦品种的株高均呈下降趋势;在低浓度铅(小于200 mg/kg)处理下,2个小麦品种的鲜、干重均随铅浓度的增加而呈增加趋势,而当铅浓度超过200 mg/kg时整体上均呈下降趋势;在相同施肥水平条件下,受铅胁迫的2个小麦品种根冠比均小于不施铅水平,且在铅胁迫条件下宁春13号的抗逆性略优于宁春4号;在铅胁迫环境下,较高浓度(200～800 mg/kg)的铅胁迫使2个小麦品种的生理生化活性严重受阻,从而影响了对氮、磷和钾的积累。结论]为对受铅污染的农田采取合理的栽培调控措施提供了理论依据。
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| 关 键 词： | 铅 小麦 生长发育 养分 |
The Impact of Lead Stress on Growth and Development of Two Varieties of Wheat |
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| Institution: | YANG Sheng-long et al (Institute of Crop; Ningxia Academy of Agricultural and Forestry Sciences; Yongning; Ningxia 750105); |
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| Abstract: | Objective] This study was to explore the impact of lead stress on growth of wheat.Method] Taking two wheat varieties Ningchun No.13 and Ningchun No.4 as experimental materials,the growth and development of wheat under the stress of different concentration of stress was studied using potting method.Result] With the increase of externally applied Pb,the plant height of two wheat varieties tested assumed a falling trend.When stressed by low concentration of Pb(lower than 200 mg/kg),the fresh weight and dry weight of both varieties rose with the increase of Pb concentration;however,once exceeded 200 mg/kg,they totally showed a decline trend.Under a same fertilization level,root-stalk ratios of Pb-stressed-plants of two varieties were lower than that normally grown,of two varieties Ningchun No.13 performed better than Ningchun No.4.Higher concentration of Pb(200-800 mg/kg) severely blocked the physiological-chemical activity of both wheat varieties,which hindered the accumulation of N,P and K.Conclusion] Our results provided theoretical basis for taking reasonable cultivation countermeasures for the Pb-polluted paddy field. |
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| Keywords: | Pb Wheat Growth and development Nutrient |
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