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| 施氮量对氮高效水稻种质4007的氮素吸收、转运和利用的影响 | |
| 引用本文： | 晏娟,沈其荣,尹斌. 施氮量对氮高效水稻种质4007的氮素吸收、转运和利用的影响[J]. 土壤学报, 2010, 47(1): 107-114 |
| 作者姓名： | 晏娟 沈其荣 尹斌 |
| 作者单位： | 1. 南京农业大学资源与环境科学学院,南京,210095;土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京,210008;巢湖学院化学与材料科学系,安徽巢湖,238000 2. 南京农业大学资源与环境科学学院,南京,210095 3. 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京,210008 |
| 基金项目： | 国家自然科学基金项目（30671234）资助 |
| 摘 要： | 田间条件下,以当地水稻品种武运粳15(WJ15)为对照,对氮高效水稻种质4007在不同施氮水平(0、100、150、200和250 kg hm-2)下的氮素吸收、累积、转运、产量及氮肥利用率进行了研究。结果表明施氮量显著促进水稻各生育期地上部氮素的累积,水稻从分蘖盛期到拔节期植株氮素累积量最大,占总生育期的32.7%～41.6%。当施氮量从0增加至250 kg hm-2,水稻种质4007的氮素转运量的从72.0上升至104kg hm-2,氮素转运率从66.2%下降至51.3%;而WJ15的氮素转运量从57.0上升至96.5 kg hm-2,氮素转运率也从57.1%下降至46.8%。籽粒中的氮素65.3%～87.6%来自营养器官的转运,仅12.4%～34.7%是后期从土壤吸收所得。由于较高的收获指数(HI)和氮收获指数(NHI),水稻种质4007的平均氮肥表观回收率(REN)和氮肥农学利用率(AEN)分别较品种WJ15高出24.5%和95.6%。本试验结果还显示4007和WJ15的适宜施氮量分别是150 kg hm-2和200 kg hm-2,此时,水稻可维持较高的产量和保持较高的氮肥利用率。 |
| 关 键 词： | 水稻氮素吸收 氮素转运量 氮肥利用率 |
Effects of nitrogen application rate on uptake, translocation and use of nitrogen by rice germ plasm 4007 high in nitrogen use efficiency |
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| Yan Juan,Shen Qirong and Yin Bin. Effects of nitrogen application rate on uptake, translocation and use of nitrogen by rice germ plasm 4007 high in nitrogen use efficiency[J]. Acta Pedologica Sinica, 2010, 47(1): 107-114 | |
| Authors: | Yan Juan Shen Qirong Yin Bin |
| Affiliation: | College of Resources and Environmental Sciences, Nanjing Agricultural University; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences; Department of Chemistry and Material Sciences, Chaohu Unive;College of Resources and Environmental Sciences, Nanjing Agricultural University;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences |
| Abstract: | A field experiment,designed to have 5 N levels,i.e.0,100,150,200 and 250 kg hm-2,was conducted in 2005 to study effects of N application rate on uptake,accumulation,and translocation of N by rice germ plasm 4007 high in nitrogen use efficiency(NUE),and yield of the crop,with a native rice cultivar(Wuyunjing15,WJ15) as CK.Results show that increasing N application significantly stimulated N accumulation in rice plants at all growth stages.The highest was found during the stages between mid-tillering and join... |
| Keywords: | Nitrogen uptake of rice Nitrogen translocation Nitrogen use efficiency |
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