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| 广东南雄烟区烤烟氮素累积分配及利用特征 | |
| 引用本文： | 杨志晓,刘化冰,柯油松,吴文斌,张小全,邱妙文,赵伟才,杨铁钊.广东南雄烟区烤烟氮素累积分配及利用特征[J].应用生态学报,2011,22(6):1450-1456. |
| 作者姓名： | 杨志晓 刘化冰 柯油松 吴文斌 张小全 邱妙文 赵伟才 杨铁钊 |
| 作者单位： | 1. 河南农业大学烟草学院,郑州450002;贵州省烟草科学研究所,贵阳550081 2. 河南农业大学烟草学院,郑州,450002 3. 广东省烟草南雄市有限公司,广东南雄,512400 4. 广东省南雄烟草科学研究所,广东南雄,512400 |
| 基金项目： | 国家烟草专卖局项目(110200601020)资助 |
| 摘 要： | 在广东南雄烟区以烤烟品种K326为材料,采用田间原位培养方法和15N同位素示踪技术,在大田条件下研究了土壤氮素矿化特征、烤烟氮素累积分配规律以及当季施入肥料氮的分配情况.结果表明:南雄烟区土壤氮素矿化量随着生育期推移呈上升趋势,在移栽后75 d达到高峰,此后下降;不施氮处理土壤氮素矿化量在各生育期均显著高于施氮处理;烟株不同器官氮素积累量表现为叶片＞茎＞根.烤烟在团棵期和打顶期以吸收肥料氮为主,成熟期则以吸收土壤氮为主,烟株整个生育期吸收的氮素主要来源于土壤氮,且吸收的土壤氮及其占总氮的比例随生育期推移和叶片着生部位的升高而增加.氮肥烟株利用率、土壤残留率和损失率分别为30.8%、32.3%和36.9%.南雄烟区土壤氮素矿化能力较强,土壤氮对上部叶片质量的影响较大,在施氮量为150kg·hm-2条件下,肥料氮的残留量和损失量较高. |
| 关 键 词： | 烤烟 氮素 土壤 矿化 15N示踪 |
Nitrogen uptake and allocation characteristics of flue-cured tobacco in Nanxiong tobacco-planting area of Guangdong Province |
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| Yang Zhi-Xiao,Liu Hua-Bing,Ke You-Song,Wu Wen-Bin,Zhang Xiao-Quan,Qiu Miao-Wen,Zhao Wei-Cai,Yang Tie-Zhao.Nitrogen uptake and allocation characteristics of flue-cured tobacco in Nanxiong tobacco-planting area of Guangdong Province[J].Chinese Journal of Applied Ecology,2011,22(6):1450-1456. | |
| Authors: | Yang Zhi-Xiao Liu Hua-Bing Ke You-Song Wu Wen-Bin Zhang Xiao-Quan Qiu Miao-Wen Zhao Wei-Cai Yang Tie-Zhao |
| Institution: | YANG Zhi-xiao1,2,LIU Hua-bing1,KE You-song3,WU Wen-bin3,ZHANG Xiao-quan1,QIU Miao-wen4,ZHAO Wei-cai4,YANG Tie-zhao1(1College of Tobacco Science,Henan Agricultural University,Zhengzhou 450002,China,2Guizhou Tobacco Science Research Institute,Guiyang 550081,3Nanxiong Tobacco Co.Ltd.,Nanxiong 512400,Guangdong,4Nanxiong Tobacco Science Research Institute,China) |
| Abstract: | By the method of field in situ culture and 15N isotopic tracer technique,and taking flue-cured tobacco(Nicotiana tobacum) cultivar K326 as test material,a field experiment was conducted in the Nanxiong tobacco-planting area of Guangdong Province to study the characteristics of soil nitrogen(N) mineralization,the patterns of N accumulation and allocation in tobacco plants,and the allocation of plant-absorbed fertilizer N applied in current growth season.In the study area,the amount of soil mineralized N incr... |
| Keywords: | flue-cured tobacco nitrogen soil mineralization 15N tracer |
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