| 毛乌素沙地沙芥和斧形沙芥根系分布特征 |
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| 引用本文： | 黄修梅,郝丽珍,王怀栋,庞杰.毛乌素沙地沙芥和斧形沙芥根系分布特征[J].北方园艺,2012(8):20-24. |
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| 作者姓名： | 黄修梅 郝丽珍 王怀栋 庞杰 |
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| 作者单位： | 内蒙古农业大学,内蒙古自治区野生特有蔬菜种质资源与种质创新重点实验室,内蒙古 呼和浩特 010019 |
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| 基金项目： | 国家自然科学基金资助项目，内蒙古科技攻关资助项目，内蒙古自然科学基金资助项目，内蒙古人才基金资助项目 |
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| 摘 要： | 以毛乌素沙地沙芥和斧形沙芥为试材,采用全挖法,研究了其根系周围土壤含水量变化、根系分布及水平根系空间分布特征。结果表明:在自然生境中,沙芥和斧形沙芥1a生植株根系周围的平均土壤含水量分别为(2.68±0.11)%、(2.50±0.45)%;2a生的分别为(3.13±0.46)%、(1.90±0.68)%。沙芥和斧形沙芥主根垂直,水平根系数目较少、但长度极其发达。沙芥和斧形沙芥2a生主根长均约为120cm,最长水平根分别为380、400cm,水平根累计总长分别为1 590、3 340cm。沙芥和斧形沙芥2a生水平根系均在深度40～60cm、距主根0～40cm的空间范围内分布最多,均在40～60cm的土层深度分布最大,因此,沙芥和斧形沙芥主要依靠延长水平根系寻找远距离水源来适应低土壤含水量环境,斧形沙芥比沙芥更能适应低土壤含水量。
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| 关 键 词： | 毛乌素沙地 十字花科 沙芥属 沙芥 斧形沙芥 根系 |
Root Distribution Characteristic of P.cornutum(L.) Gaertn and P.dolabratum Maxim in Mu Us Sandy Land |
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| HUANG Xiu-mei
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HAO Li-zhen
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WANG Huai-dong
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PANG Jie.Root Distribution Characteristic of P.cornutum(L.) Gaertn and P.dolabratum Maxim in Mu Us Sandy Land[J].Northern Horticulture,2012(8):20-24. |
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| Authors: | HUANG Xiu-mei HAO Li-zhen WANG Huai-dong PANG Jie |
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| Institution: | (Inner Mongolia Agricultural University,Key Laboratory of Wild Peculiar Vegetable Recourse and Germplasm Enhancement,Hohhot,Inner Mongolia 010019) |
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| Abstract: | The distribution characteristics and the horizontal roots spatial distribution and the soil moisture around the root system of P.cornutumand P.dolabratumin Mu Us Sandy Land were studied,by using the methods of digging out whole roots.The results showed that round the biennial roots system of P.cornutumand P.dolabratum,the soil moisture were(3.13±0.46) % and(1.90±0.68) % respectively;around the annual roots system,the soil moisture were(2.68± 0.11) %and(2.50±0.45) %respectively.The primary roots of P.cornutumand P.dolabratumwere all nearly vertical,the horizontal roots system were extremely developed,but number less.The tap-root length of P.cornutumand P.dolabratumof biennial all were 120cm;the longest horizontal roots were 380cm and 400cm respectively;the length of total horizontal roots were 1 590cm and 3 340cm respectively;the maximal spacial distribution all were from 20to 40cm in the soil depth,from 0to 40cm in the radius range.The roots’ adaptive mechanism of P.cornutumand P.dolabratum had strong tap-roots to absorb more water.P.dolabratumhad strongger adaptive than P.cornutumto low soil moisture content. |
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| Keywords: | Mu Us Sandy Land Cruciferae Pugioniumgaertn P cornutum P dolabratum roots |
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