摘要
以银北地区盐碱地为对象,研究了旱地、水田、灌木林和荒草地4种土地利用方式对0~20 cm和20~40 cm土层土壤容重、总孔隙度、有机碳含量、全氮含量、全磷含量、全钾含量、pH以及全盐含量的影响。结果表明,银北地区不同土地利用方式土壤理化性质差异显著(P<0.05)。旱地和水田土壤容重高于灌木林和荒草地,土壤总孔隙度则低于灌木林和荒草地。4种土地利用方式土壤有机碳和全量养分含量在0~20 cm和20~40 cm土层表现较为相似,有机碳和全氮含量表现为灌木林最高,旱地和水田次之,荒草地最低;旱地和水田土壤全磷含量显著高于灌木林和荒草地(P<0.05);全钾含量在旱地土壤中最高,水田最低。除旱地20~40 cm土层外,土壤pH和全盐含量均表现为荒草地显著高于其他3种土地利用方式(P<0.05)。加权灰色关联分析显示,0~20 cm和20~40 cm土层均表现为灌木林土壤理化性质关联度最大,旱地和水田次之,荒草地最小,说明灌木林对改良银北盐碱地土壤理化性质的效果最优。
Taking saline-alkali land in Yinbei area as the research object,the effects of four land use patterns(dry land,paddy field,shrubbery and grassland)on soil bulk density,total porosity,organic carbon content,total nitrogen content,total phosphorus con⁃tent,total potassium content,pH and total salt content in 0~20 cm and 20~40 cm soil layers were studied.The results showed that the soil physical and chemical properties of different land use types in Yinbei area were significantly different(P<0.05).The soil bulk den⁃sity of dry land and paddy fields was higher than that of shrubland and grassland,and the total soil porosity was lower than that of shru⁃bland and grassland.The soil organic carbon and total nutrients of four land use types were similar in 0~20 cm and 20~40 cm soil lay⁃ers.The content of organic carbon and total nitrogen was the highest in shrubbery,followed by dry land and paddy fields,and the low⁃est in grassland.The soil total phosphorus content in dry land and paddy fields was significantly higher than that in shrubbery and grassland(P<0.05).The total potassium content was the highest in dryland soil and the lowest in paddy fields.The soil pH and total salt content of grassland were significantly higher than those of the other three land use types(P<0.05),except for the 20~40 cm soil layer of dry land.The weighted gray correlation analysis showed that the correlation degree of soil physical and chemical properties in 0~20 cm and 20~40 cm soil layers was the highest in shrubbery,followed by dry land and paddy fields,and the lowest in grassland,indi⁃cating that shrubbery had the best effect on improving soil physical and chemical properties in Yinbei saline-alkali land.
作者
吴霞
王长军
樊丽琴
张永宏
王旭
WU Xia;WANG Zhang-jun;FAN Li-qin;ZHANG Yong-hong;WANG Xu(Institute of Agricultural Resources and Environment,Ningxia Academy of Agriculture and Forestry Sciences,Yinchuan 750002,China)
出处
《湖北农业科学》
2024年第4期44-49,共6页
Hubei Agricultural Sciences
基金
宁夏自然科学基金项目(2022AAC03458
2022AAC03457)
宁夏农业高质量发展和生态保护科技创新示范课题(NGSB-2021-11-01)。
关键词
盐碱地
改良
土地利用方式
土壤理化性质
灰色关联分析
银北地区
saline-alkali land
improvement
land use pattern
soil physical and chemical properties
gray correlation analysis
Yin⁃bei region
