robinia pseudoacacia 中文意思是什麼
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Indicatory function of soil moisture of undergrowth vegetations in the robinia pseudoacacia forests with different densities in semi - arid region on the loess plateaus
林下植被對半乾旱區不同密度刺槐林地土壤水分環境的指示作用 -
Effect of natrual brassinolide on germination of pinus tabulaeformis and robinia pseudoacacia seeds
天然油菜素內酯對油松和刺槐種子發芽的影響 -
Allozyme genetic investigation on robinia pseudoacacia
馬尾松種子園的遺傳多樣性與父本分析 -
Study on the suitable conditions for shoot propagation and rhizogenesis of robinia pseudoacacia cv idaho
香花槐試管苗的繼代培養和生根移栽條件研究 -
On the loess plateau, water is the main limiting factors for vegetation growth. root distribution characters have special ecological meaning as it reflected the utilizations of trees to the environments. even - aged stands of robinia pseudoacacia on slope lands facing south and north were selected as sampling plots for root distribution investigation. investigatiing results showed that indicated that on all sites, root biomass decreased with depth, and the distribution depth of fine root was deeper than that of coarser root. the results of variance analysis indicated that there were great differences in root biomass among different diameter classes, and coarser root was the main sources of variance, and the root biomass, especially fine root ( < 3mm ) biomass on northern exposition sites was bigger than that on southern exposition sites. analysis of the vertical root distribution parameters, root extinction coefficient, indicated that the value of on northern exposition was more than 0. 982, while the value of on southern exposition was less than 0. 982, which indicated that the vertical root distribution depth of robinia pseudoacacia on southern exposition was deeper than that on southern exposition. and the distribution depth of fine roots ( < 1mm ) was deeper than that of thicker roots ( < 3mm ), which was in favor of the uptake of water and nutrients from deeper layers, helped the trees to adapt the arid environment, and promoted the growth of the upper parts of the tree
在中國西北黃土高原地區，水分是樹木生長發育的主要限制因子.根系分佈特徵由於反映了樹木對環境條件的利用程度而具有更加特殊的生態意義.本研究選擇陽坡和陰坡不同立地上年齡一致的刺槐林調查了根系分佈特徵.根系垂直分佈特徵的調查結果表明，在所有立地上，根系生物量隨著深度的增加而降低，其中細根的分佈深度大於粗根的分佈深度.方差分析結果表明:不同立地上不同徑級根系的分佈特徵也有明顯的差別，粗根是差異存在的主要原因，陰坡立地上的根系生物量，特別是細根生物量大於陽坡立地上的.對根系消弱系數的分析結果表明，陰坡立地上的根系消弱系數大於0 . 982 ，而陽坡立地上的根系消弱系數小於0 . 982 ，說明陰坡立地上刺槐根系的生物量在深層土壤中的分佈相對量更大一些.其中細根的根系消弱系數大於粗根的，這種根系分佈特徵有利於根系對深層土壤水分養分的吸收利用，進而促進樹木地上部分的生長發育.圖3表3參15 -
Abstract : on the loess plateau, water is the main limiting factors for vegetation growth. root distribution characters have special ecological meaning as it reflected the utilizations of trees to the environments. even - aged stands of robinia pseudoacacia on slope lands facing south and north were selected as sampling plots for root distribution investigation. investigatiing results showed that indicated that on all sites, root biomass decreased with depth, and the distribution depth of fine root was deeper than that of coarser root. the results of variance analysis indicated that there were great differences in root biomass among different diameter classes, and coarser root was the main sources of variance, and the root biomass, especially fine root ( < 3mm ) biomass on northern exposition sites was bigger than that on southern exposition sites. analysis of the vertical root distribution parameters, root extinction coefficient, indicated that the value of on northern exposition was more than 0. 982, while the value of on southern exposition was less than 0. 982, which indicated that the vertical root distribution depth of robinia pseudoacacia on southern exposition was deeper than that on southern exposition. and the distribution depth of fine roots ( < 1mm ) was deeper than that of thicker roots ( < 3mm ), which was in favor of the uptake of water and nutrients from deeper layers, helped the trees to adapt the arid environment, and promoted the growth of the upper parts of the tree
文摘:在中國西北黃土高原地區，水分是樹木生長發育的主要限制因子.根系分佈特徵由於反映了樹木對環境條件的利用程度而具有更加特殊的生態意義.本研究選擇陽坡和陰坡不同立地上年齡一致的刺槐林調查了根系分佈特徵.根系垂直分佈特徵的調查結果表明，在所有立地上，根系生物量隨著深度的增加而降低，其中細根的分佈深度大於粗根的分佈深度.方差分析結果表明:不同立地上不同徑級根系的分佈特徵也有明顯的差別，粗根是差異存在的主要原因，陰坡立地上的根系生物量，特別是細根生物量大於陽坡立地上的.對根系消弱系數的分析結果表明，陰坡立地上的根系消弱系數大於0 . 982 ，而陽坡立地上的根系消弱系數小於0 . 982 ，說明陰坡立地上刺槐根系的生物量在深層土壤中的分佈相對量更大一些.其中細根的根系消弱系數大於粗根的，這種根系分佈特徵有利於根系對深層土壤水分養分的吸收利用，進而促進樹木地上部分的生長發育.圖3表3參15 -
Difference of fine root vertical distribution of robinia pseudoacacia under the different climate regions in the loess plateau
黃土高原不同水分生態區刺槐細根垂直分佈的差異 -
A study on the main germination factors of robinia pseudoacacia seeds under salt and alkali mixed stresses
鹽堿脅迫下刺槐種子萌發主導因素的確定 -
Research on rainfall - infiltration processes under artificial robinia pseudoacacia plantation and afforestation technology in the slope of low - land in taihang mountains
太行山低山丘陵區坡地人工刺槐林降雨入滲及造林技術研究 -
Relationship between clonal physiology indices and drought resistance of robinia pseudoacacia l. under different drought grades
乾旱梯度下刺槐無性系生理指標的變化與品種抗旱性的關系 -
Under 40cm, the contents are about 60mg / kg. 3. under the different site types, the contents of soil organic matter, total n, available n, p, k have no obviously difference. but the height of the robinia pseudoacacia, the cap of the robiniapseudoacacia, the diameter of the robinia pseudoacacia above one meter of ground, the length of new branch have the similar disciplinarian : semi - shady > sunny > semi - sunny no matter what may, july, september
不同立地條件下土壤有機質、全氮、有效氮、速效磷和速效鉀含量差異不顯著，但刺槐的株高、冠幅、胸徑、新枝卻有明顯的差異，無論是5月份、 7月份還是9月份、其株高、冠幅、胸徑、新枝長度從大到小順序均是：半陰坡半陽坡陽坡。 -
1. forests drought resistance the roots of pinus tabulaeformis, platycladus orientalis and robinia pseudoacacia were wrapped by plastic film, then the dry environment was made. the tests showed that the photosynthetic rate of p. orientalis was higher than that of p. tabulaeformis, but the transpiration was opposite. after one year of treating, photosynthetic rate of p. tabulaeformis reduced 55. 1 %, p
測定結果表明，在相同乾旱的條件下，側柏的凈光合速率始終大於油松，而蒸騰速率則相反，在乾旱脅迫的第2年，油松光合速率比第一年降低了55 . 1 ，側柏降低了45 . 6 ，刺槐降低了56 . 2 。
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