摘要
Biodiversity of arbuscular mycorrhizal colonization and spore population was investigated in different agroforestry trees and crop species collected from different locations of Dinajpur district of Bangladesh. Roots and rhizosphere soils of Albizia procera Benth., Capsicum frutescens L, Curcuma domestica Vahl., Dalbergia sissoo Roxb. and Swietenia macrophylla King. from Dashmail; C. domestica, D. sissoo, Eucalyptus camaldulensis Dehnn., Gmelina arborea （Roxb） DC and Oryza sativa L. from Kantaji and C. domestica, D. sissoo, Litchi chinensis Sonn. and O. sativa from Ramsagar were collected. Roots and soils were assessed following standard methods. The range of AM colonization was recorded 36%-79% from Dashmail. The highest AM colonization was recorded in C. frutescens （79%） and the lowest was in C. domestica （36%）. The range of colonization was recorded as 33%-70% from Kantaji. The highest AM colonization was recorded in G. arborea （70%） and the lowest was in O. sativa （33%）. The range of AM colonization was recorded as 35%-70% from Ramsagar. The highest AM colonization was recorded in D. sissoo （70%） and the lowest was in O. sativa （35%）. Arbuscular mycorrhizal spore population varied from 54 to 140/100g dry soil in the soils from Dashmail. The highest was in the soils of D. sissoo （140） and the lowest was in C. domestica （54）. The spore population varied from 63 to 221 in Kantaji. The highest was in G. arborea （221） and the lowest was in O. sativa （63）. The range population in Ramsagar varied from 69 to 160. The highest was recorded in D. sissoo （160） and the lowest was in L. chinensis （69）. No significant relationship of soil pH and soil OM with AM colonization and with spore population was observed. Simpson＇s index of diversity （Ds） and Shannon＇s index of diversity- （Hs） were highest in the soil of D. sissoo from Kantaji and the lowest in the soils of O. sativa from Ramsagar. Biodiversity of AM colonization, spore population and the distribution of AM fungi in the rhizosphere soils of different agroforestry plants indicated the occurrence of AM fungi, mycotrophic nature of the trees and crop species, contribution and necessity of AM fungi and the AM dependence of the agroforestry plants growing in Dinajpur district of Bangladesh.
从孟加拉国Dinajpur地区采集了不同农林复合区内树种和作物种,对采集植物的丛枝菌根多样性进行了研究。在3个取样地采集了18种植物的根和根际土,取样地和被采取植物分别为:取样地Dashmail为黄豆树(Albizia procera Benth.)、小指椒(Capsicum frutescens L)、姜黄(Curcuma domestica Vahl)、印度黄檀(Dalbergia sissoo Roxb.)和大叶桃花心木(Swietenia macro-phylla)_5种植物;取样地Kantaji为姜黄(C.domestica)、印度檀(D.sissoo)、赤桉(Eucalyptus camaldulensis Dehnn.)、石梓(Gmelina arborea(Roxb)DC)和水稻(Oryza sativa L.)5种植物;取样地Ramsagar为姜黄(C.domestica),印度檀(D.sissoo),Litchi chinensis Sonn.和水稻。在取样地Dashmail,植物丛枝的分布范围在36%-79%,其中分布最高的是小指椒,达到79%,而C.domestica仅占36%。取样地Kantaji丛枝的分布范围在33%-70%之间,其中分布最高的是石梓,达到79%,而O.sativa分布最低,仅36%。取样地Ramsagar丛枝的分布范围在35%-70%之间,印度檀丛枝分布在该地最高,达70%,而水稻丛枝在该地的分布最小,仅35%。在采样地Dashmail,每100克干土中所含采样植物丛枝菌根孢子群落54-140个;孢子群落最多的是印度檀(140/100g dry soil),最低的是姜黄(C.domestica)(40/100g dry soil)。在采样地Kantaji,孢子群落在63-221/100g dry soil,石梓具有的群落最高,为221/100g dry soil;印度檀为63/100g dry soil。在采样地Ramsagar,所具有的最高和最低群落分别是160/100g dry soil(D.sissoo)和69/100g dry soil(L.chinensis)。土壤pH值与土壤中丛枝分布和菌根孢子群落无显著相关性。Simpson多样性指数和Shannon多样性指数在取样地Kantaji的印度檀土壤中最高;而在取样地Ramsagar的水稻土壤中最低。研究表明孟加拉国Dinajpur地区丛枝菌根的存在、树种和作物种中的营养性质、丛枝菌根的必要性和贡献以及复合农林植物生长与丛枝菌之间的依赖关系。图6表6参24。
作者简介
P. P. Dhar （corresponding author）, male, associate professor in the Department of Botany, University of Chittagong, Chittagong-4331, Bangladesh. E-mail： partha 66bd@yahoo.com ; partha66bd@gmail.com
