干旱区生态环境知识资源中心(Arid): 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

Arid

	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
其他题名	Effects of Fertilization on Dissolved Organic Carbon and Nitrogen in the Ryegrass Farmland Soil in Wind-Water Erosion Crisscross Region on the Loess Plateau
	沈玉芳; 陶武辉; 李世清
来源期刊	自然资源学报
ISSN	1000-3037
出版年	2011
卷号	26 期号:8 页码:1387-1393
中文摘要	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。
英文摘要	Many results showed fertilization enhanced plant assimulation．But its 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 fertilization on the contents and accumulations of DOC and DON in farm soil．The results showed that both the application of nitrogen fertilizer and phosphorus fertilizer increased the above-ground and root biomass of ryegrass．And the relative relation is very significant between them．There was no obvious effect on the content of DOC when only phosphorus was applied to soil．The content of DOC decreased with the application of nitrogen fertilizer． And the largest decrease amplitude，25．9%，was found in 0-20 cm by PN4 treatment in 2008． There was no significant decrease in the content of DON in the soil where only phosphorus applied．But the content of DON increased in its degree in different soil layers with the application of nitrogen fertilizer．There was an obviously positive correction between accumulation of DON and N fertilizer．And both the correction coefficients of 2007 and 2008 was 0．99(n=5)．The result indicated that the chemical nitrogen application was in favor of the biomass and DON in the region，but was against DOC．It suggested higher chemical nitrogen application was of beneficial to the increase of soil nitrogen supply capacity in wind-water erosion crisscross region on the Loess Plateau．
中文关键词	土壤 ; 可溶性有机碳 ; 可溶性有机氮 ; 施肥 ; 黑麦草
英文关键词	soil DOC DON fertilization ryegrass
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4283276
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227691
作者单位	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, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	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]. 西北农林科技大学,2011,26(8):1387-1393.
APA	沈玉芳,陶武辉,&李世清.(2011).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.自然资源学报,26(8),1387-1393.
MLA	沈玉芳,et al."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".自然资源学报 26.8(2011):1387-1393.