干旱区生态环境知识资源中心(Arid): 湘南红壤丘陵区不同植被类型下土壤肥力特征

Arid

	湘南红壤丘陵区不同植被类型下土壤肥力特征
其他题名	Characteristics of soil fertility under different vegetation types in the hilly red soil region of southern Hunan
	张璐; 文石林; 蔡泽江; 黄平娜
来源期刊	生态学报
ISSN	1000-0933
出版年	2014
卷号	34 期号:14 页码:3996-4005
中文摘要	以自然植被恢复长期定位试验为基础,通过分析自然恢复31a后形成的6个植被类型区(樟树、枫树、梓树、白檵木、唐竹、白茅草)、2个同期种植的人工植被区(湿地松、板栗)以及相邻裸地区0100 cm 土层pH值、有机质及主要养分含量的变化,明确了湘南红壤丘陵区不同植被类型对土壤肥力的影响。结果表明:(1)白茅草和唐竹区的土壤PH值显著高于裸地区,但枫树和白檵木区的土壤酸化明显。(2)土壤有机质、活性有机质、全P、速效P等指标表现为乔木>草本>灌木,碱解N、全K、速效K表现为灌木>乔木>草本,全N表现为乔木>灌木>草本。(3)土壤综合肥力优劣为:枫树区>梓树区>白檵木区>樟树区>唐竹区 >白茅草区>湿地松区>板栗区>裸地区,自然恢复植被比人工植被更有利于土壤肥力的提高。
英文摘要	In Southern China, the hilly red soil region accounts for 2.0 * 106 km2 and is an important production base for agriculture, forestry and animal husbandry. However, because of the increasing demand for firewood, timber and food in recent decades,many types of vegetation have been destroyed,which has resulted in local soil degradation and soil fertility decline, giving the region the title "red desert". This soil degradation significantly limits sustainable economic development in this region and so restoring vegetation and improving soil fertility are vital. Natural vegetation restoration, by preventing human disturbance, is an important method for improving fertility by redistributing nutrients in degraded red soil in subtropical hilly regions. However, improving soil fertility by natural vegetation restoration is a long-term process, and the effect of different plants in improving soil fertility is not well understood. In this study, the distribution regularities of nutrients in the soil profile under natural vegetation restoration compared with that in artificial vegetation plots and bare plots were investigated and the effect of natural vegetation restoration on improving soil fertility in subtropical hilly regions was assessed. A long-term natural vegetation restoration experiment (2 hectares) was initiated in 1981 at the Red Soil Experiment Station of the Chinese Academy of Agricultural Sciences, Qiyang County, Hunan Province. The effect of natural vegetation on soil fertility was assessed based on six 31 -year-old natural vegetation restoration zones,including three natural arbor plots (Cinnamomum camphora, Liquidambar formosana, and Catalpa ovate),two natural shrub plots (Loropetalum chinensis and Sinobambusa tootsik),and one natural herbage plot (Imperata cylindrica). Two artificial arbor plots (Pinus elliottii and Castanea mollissima) and one adjacent bare plot were also used. Soil samples were collected at 020,2040,4060, 6080,and 80100 cm depths in April 2012. Soil organic matter (SOM), labile organic matter (LOM),total nitrogen (TN),hydrolysable nitrogen (HN),total phosphorus (TP),available phosphorus (AP), total potassium (TK), available potassium (AK) and pH were determined. The different vegetation types had significant effects on soil fertility : (1) In Imperata cylindrica and Sinobambusa tootsik plots, the average pH values at different depths were 5.13 and 4.96, respectively, which was significantly higher than that in artificial vegetation and bare plots (average pH 4.564.62). Obvious acidification was found in Liquidambar formosana and Loropetalum chinensis plots (average pH 4.22 and 4.38,respectively) compared with that in the bare plot. (2) For all plots, soil nutrient concentrations except TK and TP significantly decreased with soil depth. The highest SOM, LOM,TP,and AP were observed in arbor plots,followed by the herbage plot,and the lowest values were found in shrub plots. Compared with artificial arbor, natural arbor increased SOM by 31.78%113.19%. HN, TK and AK decreased in the following order : shrub plots > arbor plots > herbage plot. For TN, the decreasing order was arbor plots > shrub plots > herbage plot. (3) There was a significant positive correlation between SOM, LOM, TN and HN (P <0.01). (4) The integrated soil fertility decreased in the following order : Liquidambar formosana > Catalpa ovate > Loropetalum chinensis > Cinnamomum camphora,Sinobambusa tootsik > Imperata cylindrica > Pinus elliottii > Castanea mollissima > bare. In summary, the results illustrated that natural vegetation restoration is better for improving soil fertility than artificial vegetation.
中文关键词	红壤 ; 植被类型 ; 土壤肥力 ; 自然恢复
英文关键词	red soil vegetation types soil fertility natural vegetation restoration
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5202301
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231594
作者单位	中国农业科学院农业资源与农业区划研究所, 农业部作物营养与施肥重点开放实验室;;祁阳农田生态系统国家野外试验站, 北京 100081, 中国
推荐引用方式 GB/T 7714	张璐,文石林,蔡泽江,等. 湘南红壤丘陵区不同植被类型下土壤肥力特征[J],2014,34(14):3996-4005.
APA	张璐,文石林,蔡泽江,&黄平娜.(2014).湘南红壤丘陵区不同植被类型下土壤肥力特征.生态学报,34(14),3996-4005.
MLA	张璐,et al."湘南红壤丘陵区不同植被类型下土壤肥力特征".生态学报 34.14(2014):3996-4005.