黄豆的抗旱性评价.rar
黄豆的抗旱性评价,9页8000余字,本文包含完整论文及答辩ppt摘要:人工盆栽试验条件下,通过对充分供水(80%fc)和土壤含水量自充分供水下逐渐降低过程中黄豆的光合生理、叶水势、根冠生长和膜透性等生理生化指标的测定和比较,研究和寻求在土壤含水量逐渐下降过程中黄豆的的非水力信号与水力信号及黄豆的形态和生理生化反应。结果表明,当土壤含水量...
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9页8000余字,本文包含完整论文及答辩ppt
摘 要:人工盆栽试验条件下,通过对充分供水(80%FC)和土壤含水量自充分供水下逐渐降低过程中黄豆的光合生理、叶水势、根冠生长和膜透性等生理生化指标的测定和比较,研究和寻求在土壤含水量逐渐下降过程中黄豆的的非水力信号与水力信号及黄豆的形态和生理生化反应。结果表明,当土壤含水量下降至约9.8%时,黄豆叶片气孔导度与高水处理下相比出现显著性差异,说明此时黄豆的非水力信号出现;当土壤含水量下降至7.5%左右时,高降处理黄豆叶片水势与充分供水处理相比出现显著性差异,说明此时黄豆的水力信号出现。黄豆在出现非水力信号时,叶片质膜透性较充分供水有所增大,但二者没有显著差异。水分胁迫使黄豆的根冠比增加,水分利用效率提高。
关键词:黄豆 非水力信号 水力信号 气孔导度 叶水势
Evaluation of Soybean (Glycine max) Drought Resistance Characteristics
Abstract: In this study, the photosynthetic characteristics, leaf water potential, root and shoot growth of soybean were compared under high water and drying from that, the objectives were to find the soil water threshold at which the non-hydraulic and hydraulic signals appeared. The results showed that when the soil moisture decreased to 9.8%, the stomatal conductance of the treated soybean was significantly different with that under high water, which showed the non-hydraulic signal appeared, when the soil water decreased to 7.5%, the leaf water potential was significantly different from the high water treats, thus the hydraulic signal appeared. Soil water stress made the soybean root/shoot ratio and WUE increase as compared to the high water treatments.
Key words: Soybean; Non-hydraulic signal; Hydraulic signal; Stomatal conductance; Leaf water potential
目录
摘 要
Abstract:
1 材料与方法
1.1 实验材料
1.2 实验条件
1.3播种处理
1.4 苗期处理
1.5 水分处理
1.6 测定项目与方法
1.5.1叶片光合生理
1.5.2叶水势
1.5.3 蒸腾耗水量与生物量根冠比
1.5.4水分利用效率的计算
1.5.5质膜相对透性的测定及计算
2 结果与分析
2.1 土壤水分降低过程中黄豆叶片光合生理的变化
2.2水分胁迫下黄豆根冠生长及水分利用效率
2.3土壤水分降低过程中黄豆叶片水势的变化
2.4 与黑豆混播下黄豆光合生理特征
2.5 水分胁迫对黄豆光合生理的影响
3 讨论与结论
参 考 文 献
致 谢
参 考 文 献
[1] 山仑,陈国良主编.黄土高原旱地农业的理论与实践.科学出版社.1993.
[2] 李凤民,鄢珣,郭安红,山仑.论麦类作物非水力根信号与生活史对策.生态学报,2000,20(3):510-513.
[3] 杨文治,邵明安.黄土高原土壤水分研究.北京:科学出版社,2000:23-25.
[4] 张继澍.植物生理学.西安:世界图书出版公司.1999:384-385.
[5] 高俊凤,植物生理学实验技术,西安世界图书出版公司.1999
[6] 郭安红,李凤民,李召祥,庞斌双,山仑表土干旱和根信号对春小麦产量形成的影响,应用生态学报,1999.12:689-695
摘 要:人工盆栽试验条件下,通过对充分供水(80%FC)和土壤含水量自充分供水下逐渐降低过程中黄豆的光合生理、叶水势、根冠生长和膜透性等生理生化指标的测定和比较,研究和寻求在土壤含水量逐渐下降过程中黄豆的的非水力信号与水力信号及黄豆的形态和生理生化反应。结果表明,当土壤含水量下降至约9.8%时,黄豆叶片气孔导度与高水处理下相比出现显著性差异,说明此时黄豆的非水力信号出现;当土壤含水量下降至7.5%左右时,高降处理黄豆叶片水势与充分供水处理相比出现显著性差异,说明此时黄豆的水力信号出现。黄豆在出现非水力信号时,叶片质膜透性较充分供水有所增大,但二者没有显著差异。水分胁迫使黄豆的根冠比增加,水分利用效率提高。
关键词:黄豆 非水力信号 水力信号 气孔导度 叶水势
Evaluation of Soybean (Glycine max) Drought Resistance Characteristics
Abstract: In this study, the photosynthetic characteristics, leaf water potential, root and shoot growth of soybean were compared under high water and drying from that, the objectives were to find the soil water threshold at which the non-hydraulic and hydraulic signals appeared. The results showed that when the soil moisture decreased to 9.8%, the stomatal conductance of the treated soybean was significantly different with that under high water, which showed the non-hydraulic signal appeared, when the soil water decreased to 7.5%, the leaf water potential was significantly different from the high water treats, thus the hydraulic signal appeared. Soil water stress made the soybean root/shoot ratio and WUE increase as compared to the high water treatments.
Key words: Soybean; Non-hydraulic signal; Hydraulic signal; Stomatal conductance; Leaf water potential
目录
摘 要
Abstract:
1 材料与方法
1.1 实验材料
1.2 实验条件
1.3播种处理
1.4 苗期处理
1.5 水分处理
1.6 测定项目与方法
1.5.1叶片光合生理
1.5.2叶水势
1.5.3 蒸腾耗水量与生物量根冠比
1.5.4水分利用效率的计算
1.5.5质膜相对透性的测定及计算
2 结果与分析
2.1 土壤水分降低过程中黄豆叶片光合生理的变化
2.2水分胁迫下黄豆根冠生长及水分利用效率
2.3土壤水分降低过程中黄豆叶片水势的变化
2.4 与黑豆混播下黄豆光合生理特征
2.5 水分胁迫对黄豆光合生理的影响
3 讨论与结论
参 考 文 献
致 谢
参 考 文 献
[1] 山仑,陈国良主编.黄土高原旱地农业的理论与实践.科学出版社.1993.
[2] 李凤民,鄢珣,郭安红,山仑.论麦类作物非水力根信号与生活史对策.生态学报,2000,20(3):510-513.
[3] 杨文治,邵明安.黄土高原土壤水分研究.北京:科学出版社,2000:23-25.
[4] 张继澍.植物生理学.西安:世界图书出版公司.1999:384-385.
[5] 高俊凤,植物生理学实验技术,西安世界图书出版公司.1999
[6] 郭安红,李凤民,李召祥,庞斌双,山仑表土干旱和根信号对春小麦产量形成的影响,应用生态学报,1999.12:689-695