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| 黄土高原水蚀风蚀交错区施肥对黑麦草农田土壤水溶性有机碳、氮的影响 | |
| 引用本文： | 沈玉芳,陶武辉,李世清.黄土高原水蚀风蚀交错区施肥对黑麦草农田土壤水溶性有机碳、氮的影响[J].自然资源学报,2011,26(8):1387-1393. |
| 作者姓名： | 沈玉芳 陶武辉 李世清 |
| 作者单位： | 1. 西北农林科技大学 黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西 杨凌 712100; 2. 中国科学院、 水利部 水土保持研究所,陕西 杨凌 712100; 3. 西北农林科技大学 资源环境学院,陕西 杨凌 712100 |
| 基金项目： | 中央高校基本科研业务费专项资金(QN2009083); 黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10502); 中国科学院“西部之光”人才培养计划“西部博士资助项目” |
| 摘 要： | 为阐明施肥通过增加植物同化能力,是否可影响土壤可溶性有机碳(DOC)、氮(DON)为目的,采用田间试验,研究了施肥对黄土高原水蚀风蚀交错区黑麦草生长农田DOC及DON含量及累积量的影响。结果表明,不论施氮或施磷,均能提高黑麦草冠层和根系生物量,且施氮水平与黑麦草冠层和根系生物量之间均呈极显著正相关关系。施磷对土壤DOC含量影响相对较小;土壤DOC含量随施氮水平增加呈现减少趋势,0~20 cm土层土壤DOC含量下降幅度最高达25.9%;施氮后不同土层土壤DON含量及累积量增加,0~100 cm土层DON累积量与施氮量呈显著正相关关系;单施磷时0~60 cm土层土壤DON含量较不施肥对照减少,但差异不显著。以上结果表明,在黄土高原水蚀风蚀交错区,高量无机氮肥投入可增加该区植物产量及土壤DON,但不利于土壤DOC累积,说明氮肥投入对改善该地区土壤供氮能力有积极意义。 |
| 关 键 词： | 土壤 可溶性有机碳 可溶性有机氮 施肥 黑麦草 |
| 收稿时间： | 2010-10-22 |
| 修稿时间： | 2011-03-23 |
Effects of Fertilization on Dissolved Organic Carbon and Nitrogen in the Ryegrass Farmland Soil in Wind-Water Erosion Crisscross Region on the Loess Plateau |
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| SHEN Yu-fang,TAO Wu-hui,LI Shi-qing.Effects of Fertilization on Dissolved Organic Carbon and Nitrogen in the Ryegrass Farmland Soil in Wind-Water Erosion Crisscross Region on the Loess Plateau[J].Journal of Natural Resources,2011,26(8):1387-1393. | |
| Authors: | SHEN Yu-fang TAO Wu-hui LI Shi-qing |
| Institution: | 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling 712100, China; 2. Institute of Soil and Water Conservation, CAS and Ministry of Water Resources, Yangling 712100, China; 3. College of Resources and Environmental Sciences, Northwest A & F University, Yangling 712100, China |
| Abstract: | Many results showed fertilization enhanced plant assimulation.But it's not clear that whether these assimulation products will have effect on soil dissolved organic carbon(DOC) and dissolved organic nitrogen(DON) or not.And whether that will make changes to soil quality,especially in arid and semiarid regions,such as the Loess Plateau in China.Therefore,a field trial was carried out with ryegrass as indicative crop in wind-water erosion crisscross region on the Loess Plateau,to study the effect of fertiliza... |
| Keywords: | soil DOC DON fertilization ryegrass |
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