不同林龄橡胶林土壤肥力变化差异研究

发布时间：2018-03-18 21:53

本文选题：橡胶林　切入点：不同林龄　出处：《云南农业大学学报(自然科学)》2017年02期 　论文类型：期刊论文

【摘要】：以云南河口开割林和未开割林两个不同林龄橡胶林作为研究对象,通过长期动态监测土壤肥力状况,研究其变化差异,为河口植胶区橡胶种植提供依据。选择2个不同试验点,定期采集橡胶林下土壤样品,测定其p H、有机质、水解氮、有效磷、速效钾及交换性钙镁等主要土壤肥力指标。未开割橡胶林土壤肥力较高,开割橡胶林相对较低,两者的土壤肥力均处于中等偏下肥力程度,表层土(0~20 cm)肥力显著高于深层土(20~40 cm)。橡胶林土壤肥力总体上呈下降趋势,未开割橡胶林土壤肥力略优于已开割橡胶林,应通过合理施肥来提高土壤肥力水平。
[Abstract]:Two rubber forests of different ages in the estuary of Yunnan Province were used as the research object. Through long-term dynamic monitoring of soil fertility, the variation of soil fertility was studied, which provided the basis for rubber planting in estuarine rubber planting area. Two different test sites were selected. Soil samples under rubber stand were collected regularly to determine soil fertility indexes such as pH, organic matter, hydrolyzed nitrogen, available phosphorus, available potassium and exchangeable calcium and magnesium. Soil fertility of uncut rubber forest was higher than that of open cut rubber forest. The soil fertility of both of them was in the middle level, and the soil fertility of the surface soil was significantly higher than that of the deep layer soil (20 ~ 40 cm 路m ~ (-1)). The soil fertility of the rubber forest showed a decreasing trend, and the soil fertility of the uncut rubber forest was slightly better than that of the open rubber forest, and the soil fertility of the uncut rubber forest was slightly better than that of the open rubber forest. The level of soil fertility should be improved by rational fertilization.
【作者单位】：云南省红河热带农业科学研究所;开远市林业局;
【基金】：农业部国家现代产业技术体系建设专项资金(CARS-34-ZD)
【分类号】：S714.8

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