干旱区生态环境知识资源中心(Arid): 石漠化治理土壤有机质和全氮含量的变异特征

Arid

	石漠化治理土壤有机质和全氮含量的变异特征
其他题名	Variation Characteristics of Soil Organic Matter and Total Nitrogen under Rocky Desertification Control
	舒田 1; 熊康宁2 ; 陈丽莎 2; 肖杰 2
来源期刊	西南农业学报
ISSN	1001-4829
出版年	2019
卷号	32 期号:6 页码:1323-1329
中文摘要	【目的】探明石漠化治理下不同石漠化等级土壤有机质和全氮变异特征和亏缺规律,为贵州石漠化山区土壤资源有效利用、水肥保持、植被重建及生态修复提供科学依据。【方法】采用2010年和2015年石漠化治理前后两期影像进行石漠化等级解译,结合花江示范区定点采样监测数据进行Kriging插值,通过GIS空间分析和统计分析,探讨土壤有机质和全氮变异特征并对不同石漠化等级与有机质和全氮含量进行相关分析。【结果】①石漠化面积:石漠化治理以来,花江示范区无石漠化面积增加,中度和强度石漠化面积减少。②土壤有机质及全氮含量:有机质平均含量由2010年的31. 28 g /kg升至2015年的41. 83 g /kg;全氮平均含量由2010年的2. 22 g /kg降至2015年的1. 52 g /kg;石漠化治理前轻度和中度石漠化土壤有机质和全氮含量显著高于强度石漠化,石漠化治理后潜在、轻度和中度石漠化土壤有机质显著高于强度石漠化,全氮含量不同等级石漠化间无显著差异性;从潜在石漠化至强度石漠化土壤有机质含量呈先升后降趋势,轻度和中度石漠化土壤有机质含量明显高于潜在和强度石漠化; 2010年全氮含量呈先升后降趋势,变化趋势不太明显,2015年先降后升再降呈波浪式变化。③变异系数: 2010年潜在石漠化至强度石漠化土壤有机质和全氮均呈先降后升趋势,2015年则相反,均属中等变异,且变异性逐年增大,有机质变异系数和全氮变异系数2015年的变幅均大于2010年。【结论】石漠化治理及生态修复后,土壤有机质含量升高,全氮含量有所降低,随着石漠化等级的加深土壤有机质和全氮含量先升后降,也有波浪起伏,相关性不明显。
英文摘要	【Objective】To explore the variation characteristics and deficit rules of soil organic matter and total nitrogen in different rocky desertification grades under rocky desertification control,and provide scientific basis for the effective utilization of soil resources,water and fertilizer conservation,vegetation reconstruction and ecological restoration in rocky desertification mountainous areas of Guizhou.【Method】The interpretation of rocky desertification grades was carried out in two stages before and after rocky desertification management in 2010 - 2015. Kriging interpolation was conducted by combining with in-situ sampling and monitoring data of Huajiang Demonstration Area,spatial analysis and statistical analysis were used to explore the characteristics of soil organic matter and total nitrogen variation,and correlation analysis was conducted between different rocky desertification grades with organic matter and total nitrogen contents. 【Result】(i) Rocky desertification area: since the control of rocky desertification,the area of nonrocky desertification increased,and the area of moderate rock desertification decreased. (ii) Contents of soil organic matter and total nitrogen: The average content of soil organic matter increased from 31. 28 g /kg in 2010 to 41. 83 g /kg in 2015. The average content of total nitrogen decreased from 2. 22 g /kg in 2010 to 1. 52 g /kg in 2015,the soil organic matter contents in slight and moderate rocky desertification were significantly higher than that of potential and strong rocky desertification, while that in potential,slight and moderate rocky desertification were significantly higher than in strong rocky desertification after the control. The total nitrogen content did not vary significantly among various rocky desertification grades. From potential rocky desertification to strong rocky desertification,organic matter content first rose and then descended. Soil organic matter contents in slight and moderate rocky desertification were obviously higher than in potential and strong rocky desertification; In 2010 total nitrogen content first increased and then decreased with no obvious variation trend,while wave-like varied in 2015. (iii) Variation coefficient: in 2010 soil organic matter and total nitrogen first decreased and then increased,while varied conversely in 2015,belonging to moderate variation,and the variability increased year by year,the variation coefficient of organic matter and total nitrogen in 2015 were greater than in 2010.【Conclusion】After the rocky desertification control and ecological restoration,the soil organic matter increased and the total nitrogen content decreased. With the deepening of the rocky desertification grade,the content of soil organic matter and total nitrogen increased first and then decreased,and there were also undulations,and the correlation was not obvious.
中文关键词	有机质 ; 全氮 ; 变异特征 ; 石漠化治理 ; 花江示范区
英文关键词	Organic matter Total nitrogen Variation characteristics Rocky desertification control Huajiang demonstration area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6537164
来源机构	贵州师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239628
作者单位	1.贵州师范大学喀斯特研究院;;贵州省农业科学院科技信息研究所, 国家喀斯特石漠化防治工程技术研究中心;;, 贵阳;;贵阳, 贵州;;贵州 550001;;550006, 中国; 2.贵州师范大学喀斯特研究院, 国家喀斯特石漠化防治工程技术研究中心, 贵阳, 贵州 550001, 中国
推荐引用方式 GB/T 7714	舒田,熊康宁,陈丽莎,等. 石漠化治理土壤有机质和全氮含量的变异特征[J]. 贵州师范大学,2019,32(6):1323-1329.
APA	舒田,熊康宁,陈丽莎,&肖杰.(2019).石漠化治理土壤有机质和全氮含量的变异特征.西南农业学报,32(6),1323-1329.
MLA	舒田,et al."石漠化治理土壤有机质和全氮含量的变异特征".西南农业学报 32.6(2019):1323-1329.