沙棘苗木根系生长发育特征研究  

Root Development Characteristics of Seabuckthorn's Seedlings

作　　者：刘广全[1] 土小宁[2] 王鸿哲[3] 李文华[3] 燕爱玲[3] 

机构地区：[1]国际泥沙研究培训中心,北京100044 [2]水利部沙棘开发管理中心,北京100038 [3]西北农林科技大学,陕西杨陵712100

出　　处：《西北林学院学报》2005年第3期26-30,52,共6页Journal of Northwest Forestry University

基　　金：国家"十五"科技攻关项目(2004BA510B0103);水利部"948"项目(200207);黄土高原林木培育实验室(K02-06)资助

摘　　要：沙棘苗木根系生物量、表面积、体积随着苗木地径和苗高的增加而显著增加,呈抛物线型;根系的数量、生物量、表面积和体积随土壤含水量的降低而逐渐降低,淳化土壤87.14%、70.00%、52.00%和40.00%田间持水量苗木根系的数量、生物量、表面积和体积分别为98、38、35、16条,26.26、7.90、8.70、1.32g,1145.72、355.46、290.04、34.54 cm2,87.36、30.66、29.17、2.08 cm3;安塞土壤的情况与淳化的情况类似,但吴旗土壤中等土壤含水量苗木根系发育相对丰富,87.14%、70.00%、52.00%和40.00%田间持水量苗木根系的数量、生物量、表面积和体积分别为39、44、51、39条,6.18、9.84、10.29、3.62g,299.96、365.75、469.58、213.27cm2,24.25、35.51、36.66、9.64cm3.苗木根系生物量所栽培土壤的质地越细,根系生物量越大,不同根级毛根的最大,淳化土壤毛根生物量高达10.791 g,分别为安塞和吴旗的2.0和5.0倍,之后随着根径的降低而逐渐降低.苗木地上部分生物量与地下部分生物量存在显著的线性关系,不同土壤类型和水分状况苗木的根茎比差异较大,变化范围在0.2～0.8之间.The root development of one year-old Hippophae rhamnoides' seedlings potted in greenhouse were determined under different soil types with different moistures. The results are as follows: the biomass, surface area and volume of the root system increased as parabola with seedlings' basal diameter and its' height increasing. Amount, biomass, surface area and volume of the roots, decreased gradually with soil moisture falling, were 98, 38, 35 and 16 items, 26.26, 7.90, 8.70 and 1.32 grams, 1145.72, 355.46, 290.04 and 34.54 square centimeters, 87.36, 30.66, 29.17 and 2.08 cubic centimeters under 87.14, 70.00, 52.00 and 40.00 percent of the field maximum moisture capacity in Chunhua soil respectively, so were those in Ansai soil, but were 39, 44, 51 and 39 items, 6.18, 9.84, 10.29 and 3.62 grams, 299.96, 365.75, 469.58 and 213.27 square centimeters, 24.25, 35.51, 36.66 and 9.64 cubic centimeters in Wuqi soil respectively. The thinner the soil texture for planting seabuckthorns was, the more roots biomass the seabuckthorns had. There was the most biomass of hairy roots, and then decreased with root diameter from big to small, the biomass of hairy roots in Chunhua soil was 10.78 grams, about two and five times in Ansai and Wuqi soil respectively. There was positively lineal relationship between the overground biomass and the underground biomass. The ratios between root and stem was among from 0.2 to 0.8 with the different soil types and soil moistures.

关 键 词：沙棘 水分 土壤 生长 

分 类 号：S793.601[农业科学—林木遗传育种]