干旱区生态环境知识资源中心(Arid): 基于遥感的石漠化治理下土壤肥力变化特征分析

Arid

	基于遥感的石漠化治理下土壤肥力变化特征分析
其他题名	Analysis on Variation Characteristics of Soil Fertility under Rocky Desertification Control Based on Remote Sensing
	舒田 1; 熊康宁2 ; 陈丽莎 2; 肖杰 2
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2019
卷号	28 期号:4 页码:776-785
中文摘要	为揭示生态治理下不同石漠化等级土壤肥力变化特征和规律.采用2009年和2015年治理前后两期遥感影像进行石漠化解译,结合撒拉溪示范区测土配方施肥和定点采样监测测定数据,通过Kriging插值和GIS空间分析,研究土壤肥力变化特征,探讨不同石漠化等级与土壤肥力变化规律.结果表明,(1)从2009-2015年,撒拉溪示范区无石漠化面积增加了258.14 hm~2,年动态度为1.91%.潜在、轻度、中度和强度石漠化面积分别减少了119.75、61.66、56.68和20.05 hm~2,石漠化得到明显好转.(2)土壤pH由弱酸向中性变化,速效钾含量有所降低,变异系数均由中等变异向弱变异变化.土壤有机质含量增加了16.13 g·kg~(-1),增速最快,碱解氮增速也明显,土壤全氮含量变化不大,但是有效磷含量降低明显且变异最大,有机质、全氮、碱解氮和有效磷变异系数均为中等变异.(3)从潜在石漠化到强度石漠化,土壤pH缓慢升高后降低,全氮的变化趋势与有机质基本一致且均为下降.2009年土壤碱解氮含量变化先上升后下降,而2015年则先下降后升高再下降,呈波浪式变化;有效磷含量2015年逐渐降低,而2009年则先升高后逐渐降低;土壤速效钾含量先升后降.各肥力指标变异系数2009年明显高于2015年.(4)石漠等级变化趋势为强度向中度、中度向轻度、轻度向潜在、潜在向无石漠化方向转移,除pH、有机质和碱解氮朝正向变化外,其余指标均为负变化,其中碱解氮正向变化值最大,速效钾负向变化值最大.通过生态治理,石漠化等级逐渐降低,石漠化趋向良性发展,生态系统逐渐恢复,可在不同石漠化等级土壤中适量补充氮磷钾以保持土壤肥力.
英文摘要	To reveal the characteristics and laws of soil fertility variations in different rocky desertification grades under ecological control, the rocky desertification (RD) interpretation was carried out using two remote sensing images before and after ecological control in 2009 and 2015, and combined with soil testing and fertilization and fixed-point sampling monitoring data in Salaxi Treatment Demonstration Area, and used Kriging interpolation and spatial analysis of GIS to study the characteristics of variation of soil fertility and discuss the change regulation between different RD grades and soil fertility. The results showed that: (1) From 2009 to 2015, the non-RD area in Salaxi Treatment Demonstration Area increased by 258.14 hm~2, and the annual dynamic degree was 1.91%. The potential RD, slight RD, moderate RD and strong RD was reduced by 119.75 hm~2, 61.66 hm~2, 56.68 hm~2, and 20.05 hm~2 respectively, the RD was significantly improved. (2) Soil pH changed from weakly acidic to neutral, and the content of available K decreased, the coefficient of variation (CV) varied from moderate to weak. The content of soil organic matter (OM) increased by 16.13 g·kg~(-1) and the growth rate was fast, the growth rate of available N was also obvious. The content of total nitrogen (TN) changed less, but the content of available P decreased obviously and the CV was the largest. The CV of OM, TN, available N and available P were moderately variable. (3) From potential RD to strong RD, pH rose slowly and then decreased, and the variation trend of TN content was consistent with OM and both decreased. In 2009, the change of available N content first increased and then decreased, but it decreased first, then increased and decreased, showing a wave-like change in 2015; the content of available P decreased gradually in 2015, but in 2009 it increased first and then gradually decreased. The change of available K content first rose and then fell. The CV of each indicator was significantly higher in 2009 than that of 2015; And (4) the trend of RD grade was strong to moderate, moderate to slight, slight to potential, potential to non-RD. The pH, OM and available N were positive changed, in which the varied value of available N was the largest. The other indexes were negative changed, in which the varied value of available K was the largest. Through ecological control, the grade of RD is gradually reduced, the RD tends to be benign, the ecosystem is gradually restored, and it is supplementing appropriately the amount of N, P and K in different rocky desertification grades soil to maintain soil fertility.
中文关键词	土壤肥力 ; 石漠化 ; 遥感 ; 生态治理 ; 撒拉溪示范区
英文关键词	soil fertility rocky desertification remote sensing ecological control Salaxi Treatment 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:6498024
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/2XILL650/239387
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. 基于遥感的石漠化治理下土壤肥力变化特征分析[J]. 贵州师范大学,2019,28(4):776-785.
APA	舒田,熊康宁,陈丽莎,&肖杰.(2019).基于遥感的石漠化治理下土壤肥力变化特征分析.生态环境学报,28(4),776-785.
MLA	舒田,et al."基于遥感的石漠化治理下土壤肥力变化特征分析".生态环境学报 28.4(2019):776-785.