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Allelopathic Potential Expression of the Environmental Heterogeneity in Switchgrass Rhizosphere Soil(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2014年15期
Page:
189-193
Research Field:
Publishing date:

Info

Title:
Allelopathic Potential Expression of the Environmental Heterogeneity in Switchgrass Rhizosphere Soil
Author(s):
ZHONG Wen-jin1; AN Yu1; MA Yong-qing1; 2
1.College of Resources and Environment,Northwest Agriculture and Forestry University,Yangling,Shaanxi 712100;
2.Institute of Soil and Water Conservation,Chinese Academy of Sciences,Yangling,Shaanxi 712100
Keywords:
switchgrass; rhizosphere soil; allelopathic effect; environmental heterogeneity
PACS:
S567.23
DOI:
-
Abstract:
Taking four cultivars of switchgrass (‘Pathfinder’,‘Forestberg’,‘Nebraska 28’,‘Dakota’) from different growth conditions (Guyuan,Yangling) as materials,and lettuce,alfalfa and annual ryegrass seeds as recipients.Effect of the extract of rhizosphere soil of switchgrass on the seed of recipients was studied by biological test methods.The results showed that the rhizosphere soil allelopathic potential of switchgrass on three recipients was the result of both variety and environmental.Effect of the extract of ‘Dakota’ rhizosphere soil on lettuce was the most intense between the two environments,and the strongest promotion was preformed in lettuce seedling growth at same condition (Yangling) among the cultivars.Allelopathic effect of ‘Forestberg’ and ‘Dakota’ to alfalfa seedling growth showed that the two switchgrass rhizosphere were not sensitive to the environment,while the performance ‘Pathfinder’ was stronger.The allelopathic effect of ‘Nebraska 28’ on alfalfa seedling growth was outstanding among the tested varieties.Ryegrass seedling growth showed allelopathic response to environmental heterogeneity；Lettuce seed germination were inhibited by ‘Pathfinder’,‘Forestberg’ and ‘Dakota’ in Yangling and the alfalfa seed germination were significantly inhibited by the same three varieties in Guyuan.The research could provide the scientific basis for using switchgrass as forage introduction,intercropping and mixed seeding with other forage.

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Last Update: 2014-09-21