种基盘苗与营养钵苗根系生长和形态的差异  

Differences of root growth and morphology of seed-base seedling and container seedling

作　　者：杨喜田[1] 霍利娜[1] 赵宁[1] 朱红梅[2] 段玉玲 

机构地区：[1]河南农业大学,郑州450002 [2]河南大学,河南开封475001 [3]郑州世纪游乐园管理处,郑州450009

出　　处：《中国水土保持科学》2009年第5期48-51,57,共5页Science of Soil and Water Conservation

基　　金：国家自然科学基金"不同植被恢复策略下土壤与植物根系的协同演替机制"(30872019);河南省杰出青年科学基金"植被恢复过程中的不同来源苗木根构型差异研究"(074100510012)

摘　　要：为了探明苗木培育方式与根系发育的关系,以侧柏、刺槐、白榆的幼苗为对象,研究种基盘苗与营养钵苗对幼苗根系形态的影响。结果表明：由于空气断根效应,种基盘苗抑制了侧柏和白榆主根的生长,促进了刺槐主根的生长,但种基盘能有效促进3个树种的主根沿着重力方向生长,使主根发达而且通直,侧根粗壮且分布比较均匀,营养钵苗的根系主根不明显,根系盘绕现象严重;侧柏和白榆2树种种基盘苗的一级侧根条数分别比其营养钵苗增加181.8%和128.6%,并能显著增加白榆种基盘苗的一级侧根直径;侧柏、刺槐和白榆种基盘苗的一级侧根均匀分布在1-2、2-3、3-4和4-5 cm 4个区间,而营养钵苗则集中分布在1-2和2-3 cm 2个区间;种基盘可以促进苗木一级侧根条数增加和均匀分布,对提高苗木吸收水肥能力和保土固土能力有着积极的作用。In order to find out the relationship between the method of seedling culture and root development, we presented two methods for seedling breeding, i.e. Seed-base and container. Based on the seedlings of Platycladus orientalis, Robinia pseudoacacia and Ulmus pumila in the experiment, we found out that because of the effect of root air-cutting, seed-base check the taproot growth of P. orientalis and U. pumila, and promote that of R. pseudoacacia. Seed-base can boost taproot growth towards the gravity direction, and appear a performance of vertical upgrowth taproot and sturdy and evenly distributed lateral root. On the other hand, taproot is not evident and root swirlling is serious in container seedling. P. orientalis and U. pumila seedbase seedling has a 181.8% and 128.6% greater number of first-order lateral root respectively than that of container seedling, and the diameter of first-order lateral root of U. pumila is also stimulated by seed-base. For all three species, first-order lateral roots of seed-base seedling distribute evenly in the four parts of 1 - 2, 2 - 3, 3 - 4 and 4 - 5 era, however, that of of container seedling distribute only in the parts of 1 - 2 and 2 - 3 cm. Seed-base stimulate the number of first-order lateral root and ensure its even distribution, which will play an important role in enhancing the root absorbency and the soil conservation function.

关 键 词：根系形态 种基盘苗 营养钵苗 一级侧根 

分 类 号：S512.11[农业科学—作物学] S562