[1] Nael M,Khademi H,Hajabbasi M A.Response of soil quality indicators and their spatial variability to land degradation in central Iran[J].Applied Soil Ecology,2004,27:221-232 [2] Vitousek P M,Mooney H A,Lubchenco J,et al.Human domination of earth's ecosystems[J].Science,1997,277 (5325):494-499 [3] 董孝斌,张新时.发展草地农业是农牧交错带农业结构调整的出路[J].生态经济,2005,153 (4):87-89 [4] Paruelo J M,Burke I C,Lauenroth W K.Land-use impact on ecosystem functioning in eastern Colorada,USA[J].Global Change Biology,2001,7:631-639 [5] 李飞,林慧龙,常生华.农牧交错带种植模式与种养模式的能值评价[J].草地学报,2007,15(4):322-326 [6] 韩建国,韩永伟,孙铁军,等.农牧交错带退耕还草对土壤有机质和氮的影响[J].草业学报,2004,13(04):21-28 [7] 郭艳玲,宝祥.农牧交错带退耕种草对土壤团聚体的影响[J].内蒙古草业,2005,17(4):53-55 [8] 韩永伟,韩建国,张蕴薇,等.农牧交错带草地植被的水土保持作用研究[J].水土保持学报,2004,18(4):24-28 [9] 袁卉馥,张立峰.坝上地区不同类型土地退耕还草经济效益分析--以河北省张北试区叶家村为例[J].中国农学通报,2005,21(5):433-436 [10] 韩永伟,韩建国,张蕴薇,等.农牧交错带退耕还草对土壤淀粉酶和脲酶活性的影响[J].草地学报,2005,13(1):59-62,74 [11] 鲍士旦主编.土壤农化分析[M].北京:中国农业出版社,2005.30,44,81,184 [12] Haynes R J,Beare M H.Influence of six crop species on aggregate stability and some labile organic matter fractions[J].Soil Biological and Biochemistry,1997,29(11-12):1647-1653 [13] Tyler G,Strom L.Differing organic acid exudation pattern explains calcifuge and acidifuge behavior of plants[J].Annals of Botany,1995,75:75-78 [14] Kaye J P,Mcculley R L,Burke I C.Carbon fluxes,nitrogen cycling,and soil microbial communities in adjacent urban,native and agricultural ecosystems[J].Global Change Biology,2005,11:575-587 [15] 全国土壤普查办公室编.中国土壤[M].北京:中国农业出版社,1998.878,909 [16] 谭本忠,李学垣.水旱轮作制下土壤磷组分的变化与有效磷的关系[J].华中农业大学学报,1989,(6):13-18 [17] 刘广明,杨劲松.土壤含盐量与土壤电导率及水分含量关系的试验研究[J].土壤通报,2001,32(6):85-87 [18] 徐恒刚,李临杭,翁森红.河套灌区盐渍化人工草地土壤含水量、含盐量及pH变动规律[J].四川草原,1997,(4):26-32 [19] Dolling P J.Effect of lupins and location on soil acidification rates[J].Australia Journal of Experiment Agriculture,1995,35:753-763 |