[1] 李加延,孙 升. 杏资源研究与利用进展[M]. 北京:中国林业出版社, 2000: 7 - 11
[2] 程林仙,王万瑞,仁启宗,等. 陕北仁用杏气候适宜性区划[J]. 西北林学院学报, 2001 (2) : 18 - 21
[3] 段琦梅,梁宗锁,慕小倩,等. 黄芪种子萌发特性的研究[J]. 西北植物学报, 2005, 25 (6) : 1246 - 1249
[4] A FaresA K, Alva P ,Nkedi2Kizza, et al. Estimation of soil Hydraulic p roperties of a sandy soil using capacitance p robes and guelphpermeameter[J]. Soil Sci, 2000, 165 (10) : 768 - 777
[5] 华 孟,王 坚. 土壤物理学[M]. 北京:北京农业大学出版社, 1993
[6] 梁 音,雷文进,蒋平安,等. 应用Guelph方法研究入渗与径流的关系[M] / /黄土高原土壤侵蚀与旱地农业. 西安:陕西科学技术出版社, 1997
[7] 鲍士旦. 土壤农化分析[M]. 北京,中国农业出版社, 2000
[8] 马祥华,焦菊英,温仲明,等. 黄土丘陵沟壑区退耕地植被恢复中土壤物理特性变化研究[J]. 水土保持研究, 2005, 12 (1) : 17 - 21
[9] 沈 洁,董召荣,朱玉国,等. 茶树—苜蓿间作条件下主要生态因子特征研究[J]. 安徽农业大学学报, 2005, 32 (4) : 493 - 497
[10] 李会科,赵政阳,张广军. 种植不同牧草对渭北苹果园土壤肥力的影响[J]. 西北林学院学报, 2004, 19 (2) : 31 - 34
[11] 王国梁,刘国彬,周生路. 黄土丘陵沟壑区小流域植被恢复对土壤稳定入渗的影响[J]. 自然资源学报, 2003, 18 (5) : 529 - 535
[12] Chisci G C, Bazzom P, PagliaiM, et al. Association of sulla andatrip lex shrub for the physical imp rovement of clay soils and environmental p rotection in cetral Italy [J]. Agriculture, Ecosystemsand Environment, 2001, 84: 45 - 53
[13] Martinez-Meza E, WhitfordW G. Stemflow, throughfall and channelization of stemflow by roots in three Chihuahuan Desert shrubs[J]. Journal ofArid Environments, 1996, 32: 271 - 287
[14] Gile L H, Gibbens R P, Lenz JM. Soil-induced variability in rootsystems of creosote bush (Larrea Tridentata) and tarbush ( Flourensia cernua) [J]. Journal ofArid Environments, 1998, 39: 57 - 78
[15] 闫德仁,刘永军,冯立岭,等. 农林复合经营土壤养分的变化[J]. 东北林业大学学报, 2001, 29 (1) : 53 - 56
[16] 周卫军,王凯荣,李合松. 大豆柑桔间作系统中磷的分配和迁移规律研究[J]. 应用生态学报, 2004, 15 (2) : 215 - 220
[17] Suman G, Mohan K B, Wahid P A, et al. Root competition forphosphorus between the tree and herbaceous components of silvopastoral system in Kerala, India [J]. Plantand Soil, 1996, 179:189 - 196
[18] 齐鑫山,丁卫建,王仁卿,等. 果园间种白三叶草对土壤生态及果树生产的影响[J]. 农村生态环境, 2005, 21 (2) : 13 - 17
[19] 贺明荣,冷寿慈,李增嘉,等. 粮果间作种植模式的资源利用与管理[J]. 生态学杂志, 1994, 13 (6) : 7 - 10
[20] 段舜山,蔡昆争,王晓明,等. 鹤山赤红壤坡地幼龄果园间作牧草的水土保持效应[J]. 草业科学, 2000, 17 (6) : 12 - 17
[21] 郝淑英,刘蝴蝶,牛俊玲,等. 黄土高原区果园生草覆盖对土壤物理性状、水分及产量的影响[J]. 土壤肥料, 2003 (1) : 25 - 27
[22] 刘蝴蝶,郝淑英,曹 琴,等. 生草覆盖对果园土壤养分、果实产量及品质的影响[J]. 土壤通报, 2003, 34 (3) : 184 - 186
[23] Rowe E C, Hairaih K, Giller K E, et al. Testing the safety-net roleof hedgerow tree roots by 15N p lacement as different soil dep ths[J]. Agroforestry System, 1999, 43: 81 - 93
[24] Akinnifesi F K, Kang B T, Sanginga N, et al. Nitrogen use efficiency and N-competition between leucaena hedgerows and maize inan alley cropp ing system[J]. Nutrient Cycling in Agroecosystems,1997, 47: 71 - 80
[25] Lehmann J, Weigl D, Droppelmann K, et al. Nutrient cycling inan agroforestry system with runoff irrigation in Northern Kenya[J].Agroforestry System, 1999, 43: 49 - 70
[26] Eric R, Francois N. Agroforestry, water and soil fertility management to fight erosion in trop ical mountains of Rwanda [J]. SoilTechnology, 1997, 11: 109 - 119