低覆盖度行带式种植模式下赤峰杨根系分布特征
Root Distribution of Populus × xiaozhuanica cv. ‘Chifengensis’ Planted Under Low Coverage Belt-scheme
-
摘要: 采用根钻法对低覆盖度行带式栽植模式下赤峰杨的根长密度的空间分布特征进行了研究,同时用烘干法对其根质量密度进行了测量。结果表明:赤峰杨的总平均根长密度在不同土层间变化很大,0.0~40 cm土层为根系主要分布区域,其在总平均根长密度中所占比例高达77.1%;不同径级之间的根长密度差异显著,0.0~0.2 mm径级根系的根长密度最大,可达0.61 cm·cm-3。带间根长密度变化出现了先增大后减少而后略有增大的趋势,环境因子影响根系分布,>2.0 mm的粗根根长密度主要分布于带间。低覆盖度行带式配置模式下的赤峰杨吸收根系(2.0 mm)主要分布于地表40 cm以下区域,带间是根系的主要分布区域,根系主要利用的是天然降水。Abstract: In this study, the root drilling was used to sample the space distribution of root length density (RLD) of the Populus × xiaozhuanica W. Y. Hsu et Liang cv. ‘Chifengensis’which were planted at low coverage belt scheme, the root weight density was measured by drying method simultaneously. The results showed that the total RLD changed dramatically (P P -3. With the distance increasing from tree, the RLD increased at first and decreased subsequently, and then increased slightly again. So, environment was the key factor influencing the root distribution. Thick root mainly distributed in inner-band. The fine root system of low coverage belt scheme mainly distributed at the depth of 0-40 cm in the study area. The thick root (>2.0 mm) mainly distributed below the depth 40 cm underground. It was found that the P. × xiaozhuanica ‘Chifengensis’ mainly use natural precipitation.
-
Key words:
- Populus ×
- / xiaozhuanica ‘Chifengensis’
- / root system
- / distribution
- / diameter class
-
[1] 陈廷芝,尤 莉,古 月,等.2010年夏季内蒙古干旱高温成因分析[J].干旱区资源与环境,2012,26(1):88-92. [2] 杨文斌,卢 琦.低覆盖度固沙方法[P].CN101705679A,2009:1-3. [3] 席本野,王 烨,贾黎明,等.宽窄行栽植模式下三倍体毛白杨根系分布特征及其与根系吸水的关系[J].生态学报,2011,31(1):47-57. [4] Himmelbauer M L,Vateva V,Lozanova L,et al.Site effects on root characteristics and soil protection capability of two cover crops grown in South Bulgaria[J].Journal of Hydrology and Hydromechanics,2013,61(1):30-38. [5] Zhu Y,Ren L,Skaggs T H,et al.Simulation of Populus euphratica root uptake of groundwater in an arid woodland of the Ejina Basin, China[J].Hydrological Processes,2009,23(17):2460-2469. [6] Nagler P,Jetton A,Fleming J, et al.Evapotranspiration in a cottonwood (Populus fremontii) restoration plantation estimated by sap flow and remote sensing methods[J].Agricultural and Forest Meteorology,2007,144(1):95-110. [7] Mulia R,Dupraz C.Unusual fine root distributions of two deciduous tree species in southern France: What consequences for modelling of tree root dynamics?[J].Plant and Soil,2006,281(1):71-85. [8] 宋曰钦,翟明普,贾黎明,等.不同年龄三倍体毛白杨纸浆林生长期间细根变化规律[J].生态学杂志,2010,29(9):1696-1702. [9] 朱强根,张焕朝,方升佐,等.苏北杨树人工林细根分布及其季节动态[J].林业科技开发,2008(3):45-48. [10] Raz-Yaseef N,Koteen L,Baldocchi D D.Coarse root distribution of a semi-arid oak savanna estimated with ground penetrating radar[J].Journal of Geophysical Research: Biogeosciences,2013,118(1):135-147. [11] Purushothaman R,Zaman-Allah M,Mallikarjuna N,et al.Root Anatomical Traits and Their Possible Contribution to Drought Tolerance in Grain Legumes[J].Plant Production Science,2013,16(1):1-8. [12] Douglas G B,Mcivor I R,Potter J F,et al.Root distribution of poplar at varying densities on pastoral hill country[J].Plant and Soil,2010,333(1):147-161. [13] Bu S,Rfj H.Root growth of Lotus corniculatus interacts with P distribution in young sandy soil[J].Biogeosciences,2013,10(3):1737-1749. [14] Lazorko H M.Root distribution, activity, and development for boreal species on reclaimed oil sand minesoils in Alberta, Canada[D].Saskatoon:University of Saskatchewan,2008:100-107. -
点击查看大图
计量
- 文章访问数: 3222
- HTML全文浏览量: 211
- PDF下载量: 1032
- 被引次数: 0
下载:
