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中国农学通报 ›› 2021, Vol. 37 ›› Issue (1): 21-26.doi: 10.11924/j.issn.1000-6850.casb20200200101

所属专题: 烟草种植与生产

• 农学·农业基础科学 • 上一篇    下一篇

不同成熟度烟株根际土壤无机氮含量与叶片SPAD值及氮含量的相关性分析

沐婵1(), 钱荣青1, 杨绍聪1(), 张艳军1, 姚照兵2, 李成春3, 胡选江1, 申文智3, 林姣姣1, 蔡述江1   

  1. 1玉溪市农业科学院,云南玉溪 653100
    2玉溪市特色作物营养工程技术研究中心,云南玉溪 653100
    3澄江县农业技术推广站,云南澄江 652500
  • 收稿日期:2020-02-11 修回日期:2020-08-26 出版日期:2021-01-05 发布日期:2020-12-25
  • 通讯作者: 杨绍聪
  • 作者简介:沐婵,女,1979年出生,云南通海人,高级农艺师,学士,主要从事植物营养与施肥技术等方面的研究及推广工作。E-mail: mch7962@163.com
  • 基金资助:
    玉溪市政府烟草产业服务中心科研项目“2019年抚仙湖周边绿色烤烟种植技术试验示范”

The Correlation Analysis of Inorganic N in Rhizosphere Soil and SPAD Value and N Content in Leaves of Tobacco Plants with Different Maturity

Mu Chan1(), Qian Rongqing1, Yang Shaocong1(), Zhang Yanjun1, Yao Zhaobing2, Li Chengchun3, Hu Xuanjiang1, Shen Wenzhi3, Lin Jiaojiao1, Cai Shujiang1   

  1. 1Yuxi Academy of Agriculture Science, Yuxi Yunnan 653100
    2Yuxi Characteristic Crop Nutrition Engineering and Technology Research Center, Yuxi Yunnan 653100
    3Chengjiang Agricultural Technology Promotion Station, Chengjiang Yunnan 652500
  • Received:2020-02-11 Revised:2020-08-26 Online:2021-01-05 Published:2020-12-25
  • Contact: Yang Shaocong

摘要:

采用田间调查与室内检测相结合的方法,对云南省玉溪市澄江县烤烟生产上封tu顶后10~12天的不同成熟度烟株进行分析研究。结果表明,烟株根际土壤无机氮含量直接影响烟株成熟度及叶片全氮含量,而土壤水解氮(有效氮)含量高低对其基本无影响;正常落黄烟株的根际土壤无机氮含量为52.4~58.8 mg/kg,5叶位、10叶位、15叶位及20叶位的叶片SPAD值分别为30.6、39.4、46.8、50.8,相应叶片的全氮含量分别为1.301%、1.380%、1.491%、1.648%。在烟叶采烤初期前,烟株不同叶位叶片SPAD值,与其相应叶位叶片的全氮含量、N/K值及烟株根际土壤无机氮含量呈极显著正相关。据此,采用SPAD-502 Plus叶绿素仪测定各叶位叶片SPAD值,可快速估算出烟株根际土壤无机氮含量及叶片的全氮含量,更好地判断烟株成熟度,便于及时对大田烤烟生产采取相应的管理措施。

关键词: 烤烟, 土壤无机氮, SPAD值, 叶片全氮, 相关性

Abstract:

Using the method of field investigation and laboratory testing, the tobacco plants with different maturity were analyzed in Chengjiang County in Yuxi City of Yunnan Province, 10 to 12 days after the top of flue-cured tobacco was capped. The results showed that the content of inorganic N in rhizosphere soil directly affected the maturity of tobacco plants and the content of total N in leaves, while the content of hydrolyzed N (effective N) in soil had no effect on it. The content of inorganic N in the rhizosphere of normal mature tobacco plants was 52.4-58.8 mg/kg, and the SPAD value of leaves at 5, 10, 15 and 20 leaf-site was 30.6, 39.4, 46.8 and 50.8, respectively, and the total N content of the corresponding leaves was 1.301%, 1.380%, 1.491% and 1.648%, respectively. Before the initial period of leaf harvesting and curing, the SPAD values of leaves at different leaf positions of tobacco plants were significantly and positively correlated with the total N content, N:K ratio and inorganic N content in rhizosphere soil of tobacco plants. Therefore, using SPAD-502 Plus chlorophyll analyzer to measure the SPAD value of leaves at each leaf position could quickly estimate the content of inorganic N in rhizosphere soil of tobacco plants and the content of total N in leaves, so as to better judge the maturity of tobacco plants and take corresponding field management measures.

Key words: flue-cured tobacco, soil inorganic N, SPAD values, total N in leaves, correlation

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