荒漠化草原锦鸡儿属灌丛扩增对牧草产量和植物多样性的影响  

Effects of the expansion of Caragana shrubs on forage yield and plant diversity in desert steppe

作　　者：郭璞 解李娜 满良 王金龙 李清芳 马成仓 GUO Pu;XIE Lina;MAN Liang;WANG Jinlong;LI Qingfang;MA Chengcang(Tianjin Key Laboratory of Animal and Plant Resistance/College of Life Sciences,Tianjin Normal University,Tianjin 300387,China;College of Agronomy and Resource Environment,Tianjin Agricultural University,Tianjin 300384,China)

机构地区：[1]天津师范大学生命科学学院/天津市动植物抗性重点实验室,天津300387 [2]天津农学院农学与资源环境学院,天津300384

出　　处：《草业科学》2019年第5期1215-1223,共9页Pratacultural Science

基　　金：国家自然科学基金(31570453;31170381)

摘　　要：本研究通过样方调查、生物量测定和多样性指数计算,研究了内蒙古荒漠化草原锦鸡儿(Caragana)属灌丛扩增对牧草产量和植物多样性的影响,结果发现:1)锦鸡儿灌丛内草本植物高度显著高于灌丛外和非灌丛化草地(P <0.05),灌木栽培区草地平均草本植物生物量显著大于天然灌丛化草地和非灌丛化草地。2)灌木栽培区草地和天然灌丛化草地的牧草产量显著高于非灌丛化草地,且栽培区草地的牧草产量显著高于天然灌丛化草地,说明锦鸡儿灌丛明显提高了草地牧草产量,在人工种植灌丛草地作用更加显著。3)灌木栽培区草地和天然灌丛化草地草本植物的物种丰富度、Shannon-Wiener指数、Simpson指数和Pielou均匀度均低于非灌丛化草地,这表明锦鸡儿灌丛对草本植物多样性有一定的消极作用。4)锦鸡儿灌丛明显提高了建群种克氏针茅(Stipa krylovii)的优势度。In this paper,we studied the effects of the expansion of Caragana shrub on forage yield and plant diversity in desert steppe by field sample surveys.The results showed that:1)the height of herbs inside shrub canopies was significantly greater than that of herbs outside shrub canopies and non-shrub grasslands(P<0.05),and the average biomass of herbs in the planted-shrub grassland was significantly higher than that of the natural-shrub grassland and non-shrub grassland;2)the forage yield in planted-shrub grassland and natural-shrub grassland was significantly higher than that in non-shrub grassland,and the forage yield in planted-shrub grassland was significantly higher than that in natural-shrub grassland,indicating that Caragana shrubs significantly increased the forage yield-this effect was more pronounced in planted-shrub grassland;3)the species richness,Simpson index,Shannon-Wiener index,and Pielou index of the herbs in planted-shrub grassland and natural-shrub grassland were lower than those in non-shrub grassland,indicating that Caragana shrubs had negative effects on the diversity of herbs;and 4)Caragana shrubs significantly enhanced the dominance of the useful forage species Stipa krylovii.

关 键 词：锦鸡儿属灌丛 草本植物 地上生物量 植物多样性 克氏针茅 灌木扩张 草地恢复 

分 类 号：Q945.79[生物学—植物学]