干旱区生态环境知识资源中心(Arid): 灰漠土农田长期碳投入与微生物商的关系

Arid

	灰漠土农田长期碳投入与微生物商的关系
其他题名	The Relationship between Long - term Carbon Input and Microbial Quotient in Grey Desert Soil of Cropland
	许咏梅; 杨金钰; 朱光辉; 孙九胜; 刘骅; 王西和
来源期刊	新疆农业科学
ISSN	1001-4330
出版年	2014
卷号	51 期号:12 页码:2338-2346
中文摘要	【目的】探讨由于长期施化肥和有机肥导致的碳投入差异对土壤微生物商的影响。【方法】依托国家灰漠土肥力与肥料效益长期监测试验中的5个典型化肥和有机肥料处理,分析长期不同施肥对小麦各生育期土壤微生物生物量碳(SMBC)和微生物商(qSMBC)的动态变化特征,揭示灰漠土微生物生物量碳(SMBC)、微生物商(qSMBC)、土壤有机碳(SOC)与碳投入量和小麦籽粒产量间的相关性。【结果】长期不同施肥措施下,灰漠土 SMBC含量和qSMBC在冬小麦不同生育期存在显著差异,SMBC和qSMBC均在扬花期达到最大值,分别为37.5 ~106.0 mg/kg、0.41% ~0.61%。各施肥处理全生育期SMBC平均含量为:高量氮磷钾化肥与有机肥配施(hNPKM) >常量NPK化肥与有机肥配施(NPKM) >氮磷钾化肥配施秸秆(NPKS) >不施肥(CK) >氮磷钾配施(NPK),其中hNPKM与NPKM处理、CK与NPK处理之间差异不显著。全生育期qSMBC的变化趋势为:NPKS>NPKM>CK>hNPKM>NPK。在试验中,尽管化肥配施秸秆(NPKS)的SMBC含量低于化肥与有机肥配施(hNPKM或NPKM),但其提高qSMBC的作用优于化肥配施有机肥或单施化肥(NPK),能够增加土壤活性有机碳在土壤总有机碳中所占的比例。相关性分析表明,SOC、SMBC含量均与碳投入量呈极显著线性正相关(P <0.01),小麦籽粒产量与灰漠土 SOC含量呈显著线性正相关(P<0.05),而qSMBC与碳投入量无明显相关性。【结论】长期有机(有机肥、秸秆)无机肥料配施是新疆绿洲灰漠土农田增加土壤有机碳、提升土壤质量的有效措施,长期大量单施化学肥料不利于土壤肥力的保持。
英文摘要	【Objective】 To study the effect of long - term different carbon inputs on soil organic carbon (SOC), soil microbial carbon (SMBC) and soil microbial quotient carbon (the ratio of SMBC and SOC). 【Method】Based on a 22 - year (1990 -2011) long - term fertilization experiment in northwest China,we investigated dynamics of SMBC and qSMBC during the growing period of winter wheat,the relationships between the SMBC, qSMBC, soil organic carbon (SOC) concentrations and the carbon input and grain yield of wheat were also analysed. Fertilization treatments were (1) unfertilized control (Control), (2) chemical nitrogen plus phosphate plus potassium (NPK), (3) NPK plus animal manure (NPKM), (4) 2 time NPKM (hNPKM), (5) NPK plus straw (NPKS).【Result】Results showed that the SMBC and qSMBC were significantly different between returning, jointing, flowering and harvest stage of wheat under long - term fertilization, and the largest values were observed in the flowering stage of wheat. Values for SMBC and qSMBC ranged from 37. 5 to 106.0 mg/kg and 0.41% to 0. 61%, respectively. The mean value rank (from high to low) of SMBC during the whole growing period of wheat was hNPKM, NPKM, NPKS, CK, NPK. But there were no statistically significant differences between hNPKM and NPKM, or between the control and NPK. The order for qSMBC(from high to low) is NPKS, NPKM, CK, hNPKM, NPK.【Conclusion】These results indicate that NPKS significantly increased the ratio of SMBC to SOC, i. e., qSMBC, compared with NPK fertilizer or other two NPKM fertilizations. Significant linear relationships were observed between the annual carbon input and SOC (P< 0.01) or SMBC (P < 0.05), and between the relative grain yield of wheat and the SOC content (P < 0.05) of grey desert soil, while the qSMBC was not correlated with the annual carbon input. Our study indicated the combined application of chemical fertilizer and manure or straw is the most effective agricultural practice than the long - term application of sole chemical fertilizer in order to increase SOC and to improve soil quality.
中文关键词	长期施肥 ; 灰漠土 ; 碳投入 ; 微生物商
英文关键词	long - term fertilization grey desert soil carbon input soil microbial carbon quotient
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:5341087
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231951
作者单位	新疆农业科学院绿洲养分与水土资源高效利用重点实验室,新疆农业科学院土壤肥料与农业节水研究所, 乌鲁木齐, 新疆 830091, 中国
推荐引用方式 GB/T 7714	许咏梅,杨金钰,朱光辉,等. 灰漠土农田长期碳投入与微生物商的关系[J],2014,51(12):2338-2346.
APA	许咏梅,杨金钰,朱光辉,孙九胜,刘骅,&王西和.(2014).灰漠土农田长期碳投入与微生物商的关系.新疆农业科学,51(12),2338-2346.
MLA	许咏梅,et al."灰漠土农田长期碳投入与微生物商的关系".新疆农业科学 51.12(2014):2338-2346.