农业科学研究2012，Vol.33Issue(1)：36-40,56,6.
熏蒸灭菌对连作马铃薯生长发育及土壤微生物的影响
Effects of fumigation sterilization to potato growth and soil microorganism of the continuous cropping soils
摘要
Abstract
In order to study the effect of sterilized soil on the potato growth and soil microorganism community function diversity. The experiment was carried out by potted culture with sterilized potato continuous cropping soil,which were seperately sampled from the fields from potato normal rotation and different continuous cropping period.The result showed that the characteristics of photosynthetic parameters were complicated under the condition of sterilized continuous cropping soil. The photosynthetic characteristics may be affected by nonstomatal limitation and the stomata conductance were decreased owning to the absence of soil water content, which may be the main influential factor. The activities of superoxide dismutase （SOD） in the potato leaves were increased under the continuous cropping, but the activities of ascorbate peroxidase （POD） were obviously decreased when the continuous cropping soil were sterilized. The harmful soil environment factors to potato growth were changed. Soil microorganism function diversity in potato rhizosphere soils were also influenced by continuous cropping. The average color change rate（AWCD） of Biolog Ecoplate were significant increased in the five and ten years continuous cropping period when the soil were sterilized. Compared with no sterilized soil, the AWCD were separately increased 30. 9%- 41.6% and 2. 7% - 12.8%. There are still have more high carbon substrate utilization ability and soil microorganism carbon substrate using function diversity. But the diversity of soil microbial community function to carbon substrate utilization have the trendency of gradually decline under the condition of continuous cropping.关键词
马铃薯/连作栽培/熏蒸灭菌/生长发育/微生物群落Key words
potato/continuous cropping/fumigation sterilization/growth and development/soil microorganism community分类
农业科技引用本文复制引用
杨桂丽,童娟,张丽,马琨,宋乃平..熏蒸灭菌对连作马铃薯生长发育及土壤微生物的影响[J].农业科学研究,2012,33(1):36-40,56,6.基金项目
国家自然科学基金 （）
教育部科学技术研究重大项目 （）
国家级大学生创新实验项目 （）
宁夏自然科学基金 （）
