施氮对茶树红蜘蛛及头顶挥发性有机物的影响

茶叶科学 Pub Date : 2017-09-01 DOI:10.20425/ijts.v13i01-02.9985

Jenipher A. Odak, P. Owuor, L. Manguro, F. Wachira, E. Cheramgoi

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引用次数: 2

摘要

氮肥影响茶叶产量、品质和虫害水平。红蜘蛛螨虫在肯尼亚西部长期干旱期间减少了茶叶产量。氮肥的使用可能是一种影响螨虫侵扰程度的农艺做法。头顶挥发性化合物(OVOCs)的组成也会影响螨虫对茶叶的侵害。研究了氮肥施用量对红蜘蛛螨孳生及OVOCS水平的影响。不同施氮量的螨种群差异显著(pd<0.05)。侵染高峰在0 ~ 300 kg N/ha/年，急剧下降在150 ~ 225 kg N/ha/年。随着氮肥施用量的增加，绿叶挥发物增加，部分芳香族和萜类化合物减少。1-戊烯-3-醇、3-戊烯-醇、e -2-己烯、z -3-己烯乙酸酯与氮肥用量呈显著(pd<0.05)直接线性回归关系，2-苯乙醇、乙苯、-甲基苯乙烯、长烯和ß-雪松烯与氮肥用量呈反比关系。大多数芳香和萜类化合物在150 ~ 225 kg N/ha/年之间含量最高，螨害最低。肯尼亚建议的化肥用量为100至225公斤N/公顷/年，也能产生大多数的螨虫驱虫剂，保护茶树免受虫害。使用推荐的氮肥用量可以保护茶叶免受螨虫的侵扰。发表信息文章历史:收稿日期:15.02.2017修稿日期:21.07.2017收稿日期:01.09.2017 DOI: https://doi.org/10.20425/ ijts.v13i01-02.9985

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Influence of Nitrogen Fertilisation on Red Spider Mites (Oligonychus coffeae Nietner) and Overhead Volatile Organic Compounds in Tea (Camellia sinensis)

Nitrogen fertilisation influences tea yields, quality and pests infestation levels. Red spider mites reduce tea production in western Kenya during prolonged droughts. Nitrogen fertiliser use maybe an agronomic practice that may influence infestation levels by mites. Overhead volatile compounds (OVOCs) composition also influences infestations of tea by mites. Influence of nitrogenous fertiliser rates on red spider mite infestations and OVOCS levels was determined. Mites populations varied (pd<0.05) with nitrogenous fertiliser rates. High infestations were at 0 and 300 kg N/ha/year, and sharp decline between 150 and 225 kg N/ha/year. Green leaf volatiles increased while some aromatic and terpenoid compounds decreased with increasing nitrogenous fertiliser rates. Significant (pd<0.05) direct linear regressions between 1-penten-3-ol, 3-penten2-ol, E-2-hexenal, Z-3-hexenyl acetate and inverse relationship between 2-phenyl ethanol, ethyl benzene, -methyl styrene, longifolene and ß-cedrene and nitrogenous fertiliser rates were observed. Most aromatic and terpenoid compounds, which are repellents of mites, were highest between 150 and 225 kg N/ha/year where infestations by mites were lowest. The recommended fertiliser rates of 100 to 225 kg N/ha/year in Kenya also produce most repellents of mites, protecting tea plants against infestations. Use of recommended nitrogen rates can protect tea from infestations by mites. Publication Info Article history: Received : 15.02.2017 Revised : 21.07.2017 Accepted : 01.09.2017 DOI: https://doi.org/10.20425/ ijts.v13i01-02.9985

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来源期刊

茶叶科学

CiteScore

1.50

自引率

0.00%

发文量

2558

期刊介绍： The Journal of Tea Science was established in August 1964, approved by the Publicity Department, CCCPC. Its title was inscribed by Zhu De, the chairman of CCCPC. It was discontinued during the Cultural Revolution in 1966, and it was reissued in August 1984, approved by the State Scientific and Technological Commission.Academicians Chen Zongmao and Liu Zhonghuaof the Chinese Academy of Engineering served as the directors of the editorial board. The Journal of Tea Science is managed by the China Association for Science and Technology,sponsored by the China Tea Science Society and the Tea Research Institute of the Chinese Academy of Agricultural Sciences, and edited and published by the editorial office of the Journal of Tea Science. It is the only one of Chinese core journals in the field of tea science that is included in the core library of the Chinese Science Citation Database.Its Domestic Unified Serial Number is CN 33-1115/S, its International Standard Serial Number is ISSN 1000-369X and its International publication name code is CODEN-CHKEF4. At present, the Journal of Tea Science is a bimonthly publication, published in the middle of the month, with a book size of 16.