干旱区生态环境知识资源中心(Arid): 长期施肥对河西绿洲灌漠土有机碳库储量及水稳性团聚体的影响

Arid

	长期施肥对河西绿洲灌漠土有机碳库储量及水稳性团聚体的影响
其他题名	Effects of Long-Term Fertilization on Irrigated Desert Soil Organic Carbon Stock and Soil Aggregate in Hexi Oasis
	俄胜哲 1; 车宗贤 1; 曾希柏 2; 黄涛 1; 柴彦君 2; 索东让 3; 安康 1
来源期刊	土壤通报
ISSN	0564-3945
出版年	2014
卷号	45 期号:5 页码:1157-1163
中文摘要	土壤有机碳与土壤质量和全球气候变化关系极为密切,为探明河西绿洲灌漠土农田土壤有机碳库的变化规律,以1982年设置在西北干旱区的长期定位试验为基础,研究了长期施肥对土壤有机碳库及水稳性团聚体的影响。研究结果表明,与1982年起始值相比,无论是化肥单施或配合施用,耕作层土壤(0 ~ 20 cm)有机碳储量都年均降低160 kg hm~(-2)。施用有机肥,年均投入有机碳2342 kg hm~(-2),不但可完全抵消土壤有机碳降低的趋势,而且以年均260 kg hm~(-2)的速度递增。27年连续施用有机肥可增加土壤有机碳和全氮储量7015 kg hm~(-2)和1298 kg hm~(-2),相当于有机肥中有机碳和全氮输入量的31%和25%。因此维持或提高河西绿洲灌漠土有机碳储量,年最少有机碳投入量为516 kg hm~(-2)。长期施用有机肥显著增加了土壤大水稳性团聚体(> 0.25 mm)的数量和有机碳在大水稳性团聚体中分配比例,进而增强了有机肥中有机碳的土壤固存率。
英文摘要	Soil organic carbon is closely related to soil quality and global climate change. In order to clarify the change regulation of irrigated desert soil organic carbon stock in Hexi oasis, an investigation was carried out to study the influence of fertilization on soil organic carbon stock and soil aggregate through the long-term fertilization experiment that was established on irrigated desert soil at arid region of Northwest China in 1982. The results showed that compared with the initial value of soil organic carbon stock in 1982, no matter chemical fertilizers applied either alone or combined, soil organic carbon stock annually decreased by 160 kg hm~ (-2) in tillage layer (0 ~ 20 cm) . However, organic manure addition at the amount of 2342 kg hm~ (-2) every year could offset the downward trend, and soil organic carbon stock annually increased at the rate of 260 kg hm~ (-2) . Compared with the initial value in 1982, soil organic carbon and total nitrogen stocks increased by 7015 kg hm~ (-2) and 1298 kg hm~ (-2) respectively after 27 years continuous application of organic manure, which were equal to 31% organic carbon and 25% total nitrogen in organic manure carried into soil. Therefore, to maintain or promote irrigated desert soil organic carbon stock in Hexi oasis, the least input amount of the organic carbon was 516 kg hm~ (-2) every year. Long-term application of organic manure significantly increased the quantities of soil macro water-stable aggregates (> 0.25 mm) and the proportion of soil organic carbon distributed in macro water-stable aggregates, and then promoted the soil organic carbon sequestration ratio.
中文关键词	长期施肥 ; 河西绿洲 ; 土壤有机碳 ; 土壤团聚体
英文关键词	Long-term fertilization Hexi oasis Soil organic carbon stock Soil aggregate
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:5249790
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231846
作者单位	1.甘肃省农业科学院土壤肥料与节水农业研究所, 兰州, 甘肃 730070, 中国; 2.中国农业科学院农业环境与可持续发展研究所, 北京 100081, 中国; 3.张掖市农业科学研究院, 张掖, 甘肃 734000, 中国
推荐引用方式 GB/T 7714	俄胜哲,车宗贤,曾希柏,等. 长期施肥对河西绿洲灌漠土有机碳库储量及水稳性团聚体的影响[J],2014,45(5):1157-1163.
APA	俄胜哲.,车宗贤.,曾希柏.,黄涛.,柴彦君.,...&安康.(2014).长期施肥对河西绿洲灌漠土有机碳库储量及水稳性团聚体的影响.土壤通报,45(5),1157-1163.
MLA	俄胜哲,et al."长期施肥对河西绿洲灌漠土有机碳库储量及水稳性团聚体的影响".土壤通报 45.5(2014):1157-1163.