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当前位置: 首页 > 文章 > 花江小流域石漠化过程中土壤化学性质变化研究 安徽农业科学 2009,37 (28) 3750-3753
Position: Home > Articles > Study on Changes of Soil Chemical Properties in the Process of Karst Rocky Desertification Journal of Anhui Agricultural Sciences 2009,37 (28) 3750-3753

花江小流域石漠化过程中土壤化学性质变化研究

作  者：
卢红梅;王世杰
单  位：
中国科学院地球化学研究所环境地球化学国家重点实验室;贵州省发酵工程与生物制药重点实验室
关键词：
喀斯特石漠化;土壤化学性质;小流域;花江
摘  要：
[目的]探讨樵采和开垦干扰模式下石漠化过程土壤的化学性质变化。[方法]在贵州花江连续性灰岩区的小流城范围内,比较樵采和开垦干扰模式下石漠化过程的土壤化学性质变化。[结果]花江小流域石漠化过程中土壤中性偏碱性,碳、氮含量高,C/N值比较低,多数在10以下,具有较高的氮素供应潜力,土壤阳离子代换量高,保肥性能好,但磷、钾养分普遍缺乏,有效磷大多在10 mg/kg以下,有效钾几乎都低于100 mg/kg,缓效钾都远低于300 mg/kg。随着人为干扰程度增加,花江小流域石漠化等级加剧,大部分土壤属性都有退化的趋势,体现了石漠化演变过程与土壤退化的一致性;石漠化成因对土壤性质的影响比干扰程度的影响大,樵采对土壤化学性质的影响小,开垦对土壤化学性质的影响大。茂兰凉风洞原生林下土壤养分含量大多介于花江流域的樵采和开垦序列之间。[结论]为防治喀斯特石漠化奠定基础。
译  名：
Study on Changes of Soil Chemical Properties in the Process of Karst Rocky Desertification
作  者：
LU Hong-mei et al(Guizhou Provincal Key Laboratory of Fermentation Engineering and Biopharmacy,Guiyang,Guizhou 550003)
关键词：
Karst rock desertification;;Soil chemical properties;;Watershed;;Huajiang
摘  要：
[Objective]The research aimed to discuss the changes of soil chemical properties in the process of rocky desertification.[Method] Within the small watershed of continuous limestone area in Huajiang of Guizhou Province,the changes of soil chemical properties during rocky desertification under the interference patterns of wood chopping and reclamation were researched.[Result]The result elucidated that the soil from research area with different grade of rock desertification was of neutral-alkalescency.The carbon and nitrogen content were high and the C/N value was low,most of them was less than 10,which had a good ability to provide element nitrogen.The soil had good ability to keep fertility with high cation exchange capacity(CEC),but short of phosphorus and potassium.For most samples,the available phosphorus and potassium were less than 10 mg/kg and 100 mg/kg respectively,the structure potassium contents were far less than 300 mg/kg.The rock desertification grade enhanced with the increasing of disturbing intensity and most soil characteristics showed a trend of degradation,which implied that,the evolvement of rock desertification process and the soil degradation had the same direction.The rock desertification genesis types influenced the soil chemical characteristics more than those of disturbing extent did,while wood chopping influenced soil characteristics less than that of reclamation.Most soil characteristics in wood chopping sequence were better than those of reclamation,and most soil nutrient element contents of Maolan karst virgin forest were between those of reclamation and wood chopping sequence.[Conclusion]The study will lay a foundation for the control of karst rock desertification.

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