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【目的】研究天然麻疯树根际土壤中内生菌根菌孢子果密度,揭示麻疯树根际土壤中内生菌根菌的分布特征,为麻疯树育苗繁殖和栽植推广提供科学依据。【方法】采用随机采样的方法对攀枝花市仁和区天然麻疯树根际土壤中内生菌根菌孢子果数量进行调查,确定了20个采样点,采集了20个土根混合样,利用解剖镜测定其孢子果密度,再根据1999年林业行标测定样品中的水分含量,养分含量等。【结果】天然麻疯树根际土壤采样从海拔1025m开始,直到1500m。土壤样品中均含有AM菌根菌孢子果,且数量丰富的,含量最高的土壤样品中AM菌根菌孢子果密度为236个/g干土,最小的密度为9个/g干土,平均密度为80个/g干土。土样含水量在4.01%-13.39%之间,平均值为6.79%,与AM菌根菌孢子果含量正相关。有机质平均含量为3.80g/kg,与AM菌根菌孢子果含量正相关。【结论】天然麻疯树根际土壤中均能检测出AM菌根菌孢子果,且含量高,但分布不均。它的密度随着海拔高度的升高逐渐降低,随土壤含水量的增加而增加,随土壤有机质含量的增加而增加。
【Objective】 The objective of this study was to study the density of endomycorrhizal spores in the rhizosphere of Jatropha curcas and to reveal the distribution characteristics of endomycorrhizal fungi in the rhizosphere soil of Jatropha curcas and provide a scientific basis for the propagation and planting of Jatropha curcas . 【Method】 The number of endophyte mycorrhizal fungi spores in the rhizosphere soil of natural Jatropha curcas in Renhe District of Panzhihua City was investigated by random sampling. Twenty sampling points were determined and 20 mixed samples of root and root were collected. Microscopic examination of its spore density, and then according to the determination of forestry in 1999, the sample moisture content, nutrient content and so on. 【Result】 The results showed that rhizosphere soil samples of natural Jatropha started from 1025m above sea level to 1500m. AM soil mycorrhizal spores were found in soil samples, and AM soil mycelial spores density was 236 / g dry soil with the highest content of soil samples, the minimum density was 9 / g dry soil, the average Density of 80 / g dry soil. The soil water content was between 4.01% -13.39% with an average value of 6.79%, which was positively correlated with AM mycorrhizal spore fruit content. The average content of organic matter was 3.80g / kg, which was positively correlated with the content of AM mycorrhizal spores. 【Conclusion】 Arbuscular mycorrhizal spores were detected in rhizosphere soil of natural Jatropha curcas, with high content but uneven distribution. Its density gradually decreases with the elevation above sea level, increases with the increase of soil water content, and increases with the increase of soil organic matter content.