| 土壤养分对作物茎叶稳定碳同位素组成和生物产量的影响 |
| 点此下载全文 |
| 引用本文：赵良菊,刘晓宏,肖洪浪,郭天文.2003.土壤养分对作物茎叶稳定碳同位素组成和生物产量的影响[J].地球学报,24(6):519-524. |
| DOI： |
| 摘要点击次数: 2476 |
| 全文下载次数: 2066 |
|
| 基金项目:国家“十五”科技攻关计划(2002BA517A11)，PPIC北京办事处NMS基金，中国科学院寒区旱区环境与工程研究所冰芯与寒区环境重点实验室开放基金资助 |
|
| 中文摘要:在盆栽条件下 ,对甘肃省河西地区 3个灌漠土的养分限制因子进行了研究 ,并在此基础上对高粱茎叶组织稳定C同位素组成 (δ13 C)和生物产量进行了比较分析。 3种土壤的养分限制因子分别为 :金昌小井子农场土壤为P、N、Mn、Zn ,各元素缺乏程度为P >Mn >Zn >N ;武威湖里土壤为P >N ;武威白云土壤为N >Zn >Mn。作物茎叶δ13 C值的变化规律为 :3种土壤的最佳处理 (OPT)的作物茎叶δ13 C值均高于各自的其余处理 ,小井子农场、武威湖里及武威白云作物茎叶组织的δ13 C值分别为 - 12 .0‰ ,- 12 .3‰及 - 12 .3‰ ,与不施肥条件 (CK)相比作物δ13 C值的增加幅度分别为 16 .6 3%、17.15 %和 13.17%。在所有减元素处理中 ,作物茎叶组织δ13 C值与其对应的生物产量表现为相同的变化趋势 ,在最佳处理中 ,土壤养分充足、作物生长状况良好 ,因而作物茎叶组织δ13 C值最高 ,而在所有减元素处理中 ,由于减元素使得其处理的营养不足影响作物生长 ,进而引起作物茎叶δ13 C值的降低。小井子农场土壤的高粱茎叶δ13 C值 -N及 -P处理分别为 - 13.8‰及 - 13.7‰ ,武威湖里 -P处理为 - 14 .8‰ ,居最低 ,武威白云 -N及 -Zn分别为 - 13.4‰及 - 13.3‰。在加元素处理中 ,3种土壤的高粱茎叶组织δ13 C和生物产量的关系较为复杂。 |
| 中文关键词:土壤营养水平 δ13C 高粱 生物产量 |
| |
| The Effect of Soil Nutrients on Crop Organism δ13C and Biomass |
|
|
| Abstract:Using the data obtained from experiments conducted in pots, the authors analyzed the conditions of soil nutrient and the relationship between the carbon isotope discrimination in crop and the crop biomass under the condition of different soil nutrient contents. The research has reached the follow conclusions:The nutrient limitation factors are P, N, Mn and Zn, and the order of nutrient deficiency is P>Mn>Zn>N in Xiaojingzi farm soil in Jinchang. P and N fertilizers make up the limitation factors in Huli soil in Wuwei. In Baiyun soil of Wuwei, N, Zn and Mn are the limitation factors, with the order being N>Zn>Mn.The variations of δ 13C values of sorghum leaf and stem in three sorts of soils are as follows: compared with other treatments in these soils, the δ 13C values of OPT treatments are all the highest. The δ 13C values of sorghum in Xiaojingzi farm, Huli and Baiyu are -12.016‰,-12.26‰ and -12.305‰, respectively. These data suggest that under the optimal nutrient condition the plant grows sufficiently and the δ 13C is highest among all treatments. Among all the non-added ample nutrient treatments, the biomasses are dropping with the decreasing δ 13C values,and it seems that nutrient deficiency leads to the decrease of the crop biomass and the δ 13C values. In added treatments, the connection between crop biomass and carbon isotope discrimination is complex. |
| keywords:δ13C soil nutrient sorghum biomass |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
