紫色丘陵区土壤侵蚀对土壤生物学肥力的影响

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	紫色丘陵区土壤侵蚀对土壤生物学肥力的影响
	苏正安; 张建辉
刊名	农业工程学报
	2010
卷号	26 期号:7 页码:32-37
关键词	土壤侵蚀微生物活性耕作侵蚀 137Cs技术土壤微生物量碳土壤酶
其他题名	Soil erosion impacts on soil biological fertility in a purple hilly region
通讯作者	张建辉
合作状况	国内
中文摘要	为更好地理解侵蚀土壤质量变化,该文利用137Cs技术探讨了川中丘陵区紫色土陡坡耕地土壤侵蚀对土壤生物学肥力的影响。结果表明,与无侵蚀的坡地相比,陡坡耕地土壤微生物量碳含量及碱性磷酸酶、蔗糖酶活性分别显著降低41%、44%、17%,土壤生物学肥力退化指数MFDI达-35%。陡坡耕地土壤蔗糖酶活性与137Cs浓度显著正相关(r=0.643,p=0.024),表明蔗糖酶活性随土壤侵蚀强度增大而降低。耕作侵蚀造成的陡坡耕地上坡土壤损失导致土壤微生物量碳含量、碱性磷酸酶、脲酶及蔗糖酶活性最低,而耕作侵蚀造成的陡坡耕地坡底土壤堆积导致这4个微生物特性最高,结果陡坡耕地这些微生物特性的空间变异分别增大2.8、0.8、1.4、4.5倍。紫色土陡坡耕地土壤生物学肥力退化与空间变异性增大在今后的土地管理中应引起关注。
英文摘要	In order to better understand erosion-induced changes in soil quality,soil erosion impacts on soil microbial fertility of a purple soil with steep sloping farmland were explored in the Sichuan Basin of China by using 137Cs technique.Results showed that the contents of soil microbial carbon(MBC) and activities of soil alkaline phosphate and invertase significantly decreased by 41%,44% and 17%,respectively,in these farmlands compared to a control slope,resulting in an obvious deterioration in soil microbial fertility with a 35% decrease in MFDI(soil microbial fertility degradation index).A significantly positive correlation was found between soil invertase activity and 137Cs inventory(r=0.643,p=0.024),suggesting soil invertase activity decreases with increasing soil erosion.Soil erosion by tillage resulted in the lowest soil MBC contents and enzyme activities in upslope positions,whereas soil accumulation by tillage created the highest soil MBC contents and enzyme activities in bottom positions.As a result of soil redistribution,the variations in soil MBC,alkaline phosphate,urease and invertase increased by 2.8,0.8,1.4 and 4.5 times,respectively,in these farmlands than those in the control slope.Land management strategies should involve combating the deterioration and increased spatial variation in soil microbial fertility in purple soil with steep sloping farmland.
学科主题	土壤学
分类号	S157.1
收录类别	EI ; CSCD
资助信息	国家科技支撑计划项目(2008BAD98B04);国家自然科学基金项目(40771027);水利部公益性行业科研专项(200701034);河南省高校科技创新人材支撑计划(2008HAST1T004);河南理工大学博士基金(B2010-47)
语种	中文
CSCD记录号	CSCD:3978153
公开日期	2012-05-02
内容类型	期刊论文
源URL	[http://192.168.143.20:8080/handle/131551/3900]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式 GB/T 7714	苏正安,张建辉. 紫色丘陵区土壤侵蚀对土壤生物学肥力的影响[J]. 农业工程学报,2010,26(7):32-37.
APA	苏正安,&张建辉.(2010).紫色丘陵区土壤侵蚀对土壤生物学肥力的影响.农业工程学报,26(7),32-37.
MLA	苏正安,et al."紫色丘陵区土壤侵蚀对土壤生物学肥力的影响".农业工程学报 26.7(2010):32-37.