氮用量对陕南烟叶氮钾含量、光合特性和碳氮代谢酶活性及产质量的影响

采用大田试验,以秦烟96为材料,通过设置4个供氮水平,研究增施氮肥对烤烟移栽后团棵期、现蕾期、圆顶期和成熟期烟叶氮钾含量、生理特性以及经济性状的影响。结果表明：施氮量在0-90.0 kg/hm^2范围内,随施氮量增加,各生育期烟叶氮钾和叶绿素a、b及胡萝卜素含量逐渐增加,净光合速率（Pn）、气孔导度（Gs）、胞间二氧化碳浓度（Ci）和蒸腾速率（Tr）以及中部叶硝酸还原酶和淀粉酶活性逐渐提高,大田生育期延长,农艺形状改善,产质量提高,影响程度因生育期而异;90-112.5 kg/hm^2范围内,除淀粉酶活性,大部分指标无显著变化或降低。综合分析,在陕南特定气候和土壤生态、栽培等条件下,以纯氮用量...

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Bibliographic Details
Published in西南农业学报 Vol. 29; no. 3; pp. 628 - 634
Main Author 崔志燕 阮志 陈富彩 张玲 郑璞帆 高梅 金保锋 张立新
Format Journal Article
LanguageChinese
Published 西北农林科技大学生命科学学院,陕西杨凌712100 2016
商洛市烟草公司镇安分公司,陕西镇安715000%西北农林科技大学生命科学学院,陕西杨凌,712100%广东中烟工业有限责任公司技术中心,广东广州,510385
Subjects
产质量
光合特性
氮用量
烤烟
碳氮代谢酶
Nitrogen rate
氮用量
光合特性
Enzyme activity of carbon and nitrogen metabolism
Photosynthetic characteristics
烤烟
产质量
Yield and quality of flue-cured tobacco leaves
碳氮代谢酶
Flue-cured tobacco
Online AccessGet full text
ISSN1001-4829
DOI10.16213/j.cnki.scjas.2016.03.031

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Summary:采用大田试验,以秦烟96为材料,通过设置4个供氮水平,研究增施氮肥对烤烟移栽后团棵期、现蕾期、圆顶期和成熟期烟叶氮钾含量、生理特性以及经济性状的影响。结果表明：施氮量在0-90.0 kg/hm^2范围内,随施氮量增加,各生育期烟叶氮钾和叶绿素a、b及胡萝卜素含量逐渐增加,净光合速率（Pn）、气孔导度（Gs）、胞间二氧化碳浓度（Ci）和蒸腾速率（Tr）以及中部叶硝酸还原酶和淀粉酶活性逐渐提高,大田生育期延长,农艺形状改善,产质量提高,影响程度因生育期而异;90-112.5 kg/hm^2范围内,除淀粉酶活性,大部分指标无显著变化或降低。综合分析,在陕南特定气候和土壤生态、栽培等条件下,以纯氮用量90.0 kg/hm^2,既可改善烟叶营养和碳氮代谢,提高光合性能和烟叶产质量,又可降低氮肥成本,增加经济效益。
Bibliography:Taken Qinyan 96 as tested materials, the effects of different rates of nitrogen fertilizer on the leaf nutrition （ N, K）, photosynthetic characteristics as well as enzyme activity of carbon and nitrogen metabolism and yield and quality of flue-cured tobacco leaves of Southern Shaanxl province in different growth periods under field experiments were studied. The result showed that： With the increase of N rates from 0 to 90.0 kg/hm^2, the contents of N, K and chlorophyll a, b and carotene in tobacco leaves were increased, the net photosynthetic rate （Pn） , stomatal conductance （Gs ）, transpiration rate （Tr ） and intercellular CO2 concentration （Ci ） as well as the nitrate reductase and amylase activities of middle-leaves during each period were enhanced, the growth duration after transplanting was extended, the agronomic and economic characters were improved, and these effects were varied with growth stage. However, with the increase from 90 to 112.5 kg/ hm^2 , the decreased effects or non-significant change we
ISSN:1001-4829
DOI:10.16213/j.cnki.scjas.2016.03.031