%0 Journal Article
%T Effects of Tobacco Root Decomposition on Tobacco Growth<br>烟根腐解物对烟草生长的影响
%A Mao Zhenping
%A Zhou Jiheng
%A Liu Jun
%A Deng Xiaohu
%A Yin Guangting
%A Niu Lin
%A Wang Lin
%A Chen Jieyu
%A <br>毛振萍
%A 周冀衡
%A 柳均
%A 邓小华
%A 尹光庭
%A 牛丽娜
%A 汪林
%A 陈洁宇
%J 生态毒理学报
%D 2011
%I 
%X As lots of tobacco residues remain in the soil during tobacco production, in order to study the decomposition of tobacco residues on the growth of tobacco, tobacco root, paddy soil and water were mixed together in certain proportion to form the decomposition of tobacco root under suitable conditions. Experiments were divided into 6 treatment groups with the application of different dosages of root decomposition, and the group treated with none of root decomposition was used as the control group. The physical property, the activities of root, nitrate reductase (NR) and peroxidase (POD) and the content of malondialdehyde (MDA) were measured in the extending stage, budding stage and mature stage. The results indicated that the decomposition of root restrained the growth of tobacco (nicotiana tobacum) during the period of extending stage, showing a strong allelopathic inhibition effect. In the extending stage, the content of MDA and the activity of POD increased; the activity of root and NR increased first and then decreased; the mass of fresh leaves, fresh root and the whole dry plant all decreased significantly. However, during the budding stage and mature stage, the allelopathic inhibition weakened gradually and the tobacco root decomposition turned to serve as a catalyst for tobacco growth. Besides, the decomposition of root could cause the tested tobacco to be infected by tobacco mosaic virus (TMV), the morbidity exhibited a tendency of increase with the extension of treatment time and the increase of dosage. It is demonstrated that the decomposition of root inhibited the growth of tobacco in the early stage, but promoted its growth in the latter period. The best application dosage of tobacco root decomposition was 50 g per pot in terms of the physical property and physiology index of tobacco and its infection rate by TMV.
%K Nicotiana tobacum
%K root decomposition
%K allelopathy
%K physical property
%K physiology index<br>烟草
%K 根腐解物
%K 化感作用
%K 农艺性状
%K 生理指标
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=BEC1F4700DD66C14D137590A0896A0AD&jid=B98D390DF92C35E6DD1987675E4EE86E&aid=49438F68A18A4524F1A49D1533002EDD&yid=9377ED8094509821&vid=B31275AF3241DB2D&iid=E158A972A605785F&sid=B941678158018439&eid=B7ACE2F11789CAE0&journal_id=1673-5897&journal_name=生态毒理学报&referenced_num=0&reference_num=0