[1]曹阳,文国宇,李茂军,等.种植密度对烤烟光合特性日变化及其主要化学成分的影响[J].南京农业大学学报,2019,42(4):641-647.[doi:10.7685/jnau.201811015]
 CAO Yang,WEN Guoyu,LI Maojun,et al.Effect of plant density on diurnal changes of photosynthetic characteristics and its main chemical components of flue-cured tobacco(Nicotiana tabacum L.)[J].Journal of Nanjing Agricultural University,2019,42(4):641-647.[doi:10.7685/jnau.201811015]
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种植密度对烤烟光合特性日变化及其主要化学成分的影响()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
42卷
期数:
2019年4期
页码:
641-647
栏目:
植物科学
出版日期:
2019-07-08

文章信息/Info

Title:
Effect of plant density on diurnal changes of photosynthetic characteristics and its main chemical components of flue-cured tobacco(Nicotiana tabacum L.)
作者:
曹阳1 文国宇2 李茂军2 王晓剑2 雷佳3 陈建军1
1. 华南农业大学烟草研究室, 广东 广州 510642;
2. 广东烟草韶关市有限公司, 广东 韶关 512000;
3. 广东中烟工业有限责任公司, 广东 广州 510310
Author(s):
CAO Yang1 WEN Guoyu2 LI Maojun2 WANG Xiaojian2 LEI Jia3 CHEN Jianjun1
1. Tobacco Research Laboratory, South China Agricultural University, Guangzhou 510642, China;
2. Shaoguan Tobacco Company of Guangdong Province, Shaoguan 512000, China;
3. China Tobacco Guangdong Industrial Limited Company, Guangzhou 510310, China
关键词:
烤烟种植密度光合特性化学成分相关性
Keywords:
flue-cured tobaccoplant densityphotosynthesis characteristicschemical componentscorrelation
分类号:
S572
DOI:
10.7685/jnau.201811015
摘要:
[目的]探讨种植密度对烤烟光合特性日变化及其主要化学成分的影响,为协调烤烟的碳、氮代谢,优化烤后烟叶化学成分的协调性提供理论依据。[方法]以烤烟(Nicotiana tabacum L.)品种‘K326’为试验材料,设置5个种植密度处理,即最小密度处理(T1,14 200株·hm-2)、较小密度处理(T2,15 400株·hm-2)、中等密度处理(T3,16 800株·hm-2)、较大密度处理(T4,18 500株·hm-2)、最大密度处理(T5,20 500株·hm-2),研究种植密度对烤烟光合特性和常规化学成分的影响。[结果]除最大密度处理外,其他处理烤烟净光合速率均呈双峰曲线,峰值出现在11:00和15:00;与最小密度处理相比,较小密度处理烤烟中部叶净光合速率、气孔导度、蒸腾速率分别提高14.59%、13.11%、3.25%,13:00之后胞间CO2浓度回升加快,气孔限制值逐渐下降,说明气孔限制得到有效缓解,有利于延长烟叶光合功能时间,烤后烟叶两糖比升高了4.40%,成熟度提高;最大密度处理的烤烟中部叶13:00之后净光合速率下降92.30%,胞间CO2浓度升高18.52%,气孔限制值下降17.50%,说明随着光合作用的进行,烟叶非气孔限制加剧,光合效率低,有效光合时间短,因此不利于干物质积累;净光合速率、气孔导度、蒸腾速率均与氮碱比呈极显著正相关,蒸腾速率与总糖呈显著正相关。[结论]与最大密度处理相比,较大和中等密度处理有利于优化烟株形态,协调烟叶光合速率,提高烤烟成熟度及碳、氮代谢协调性,实现优质烟叶生产。
Abstract:
[Objectives]The objectives of this study were to investigate the effects of plant density on diurnal variation of photosynthetic characteristics and main chemical components of flue-cured tobacco,and to provide a theoretical basis for coordinating the carbon and nitrogen metabolism of flue-cured tobacco and optimizing the coordination of chemical components in tobacco leaves.[Methods]The Nicotiana tabacum L. variety ‘K326’ was planted at minimum density treatment(T1,14 200 plants·hm-2),small density treatment(T2,15 400 plants·hm-2),medium density treatment(T3,16 800 plants·hm-2),larger density treatment(T4,18 500 plants·hm-2),and maximum density treatment(T5,20 500 plants·hm-2). The effects of densification on photosynthetic characteristics and chemical composition of flue-cured tobacco were studied.[Results]Compared with the minimum density treatment,the net photosynthetic rate,stomatal conductance and transpiration rate of the middle leaves with the small density treatment increased by 14.59%,13.11% and 3.25%,respectively.Intercellular CO2concentration of the middle leaves with the small density treatment rose faster and stomatal limit value decreased gradually after 13:00,indicating that stomatal limit was effectively alleviated,which was conducive to prolonging the photosynthetic function time of tobacco leaves. The ratio of two sugars in tobacco leaves treated with the small density treatment increased by 4.40% compared with the minimum density treatment,and this means that the maturity was improved. After 13:00,net photosynthetic rate decreased by 92.30%,intercellular CO2 concentration increased by 18.52%,and stomatal limit value decreased by 17.50%. The results showed that the non-stomatal restriction increased,the photosynthetic efficiency was low and the effective photosynthetic time was short,and it was not conducive to dry matter accumulation. Net photosynthetic rate,stomatal conductance and transpiration rate were significantly positively correlated with the ratio of nitrogen to alkali,and transpiration rate was significantly positively correlated with total sugar.[Conclusions]Compared with the maximum density,the treatment with larger and medium density was beneficial to optimizing the tobacco plant morphology,coordinated the photosynthetic rate of tobacco leaves,improved the maturity of flue-cured tobacco and the coordination of carbon and nitrogen metabolism,and achieved the production of high-quality tobacco leaves.

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备注/Memo

备注/Memo:
收稿日期:2018-11-10。
基金项目:广东省烟草专卖局(公司)资助项目(粤烟科[2012]26号,粤烟科[2014]1号)
作者简介:曹阳,硕士研究生。
通信作者:陈建军,教授,博导,主要从事烤烟栽培、品质生理研究,E-mail:chenjianjun@scau.edu.cn。
更新日期/Last Update: 1900-01-01