亚热带水土保持
亞熱帶水土保持
아열대수토보지
SUBTROPICAL SOIL AND WATER CONSERVATION
2011年
4期
9-13
,共5页
张朝忙%丁树文%伍世良%李成芳%郭忠录%孙妍
張朝忙%丁樹文%伍世良%李成芳%郭忠錄%孫妍
장조망%정수문%오세량%리성방%곽충록%손연
等高绿篱%空间变异%复合系统%土壤性质
等高綠籬%空間變異%複閤繫統%土壤性質
등고록리%공간변이%복합계통%토양성질
contour hedgerow%spatial variation%intercropping system%soil properties
土壤性质空间变异是一种普遍现象,但等高绿篱——坡地农业复合系统中土壤性质空间变异的研究较少。本文以设置在三峡库区王家桥小流域的香根草(Vetiveria zizanioides)绿篱试验小区为研究对象,从径流小区尺度探讨了不同措施对土壤性质空间变异的影响。结果表明,绿篱种植可降低O.2~0.002mm粒级团聚体的空间变异,绿篱+有机肥与绿篱+无机肥措施可降低〈0.002mm粒级团聚体的空间变异,绿篱+覆盖措施能降低0.2—0.002mm粒级团聚体的空间变异。绿篱种植可降低土壤有机碳、全氮、全磷、速效磷养分空间变异。施肥措施对系统内土壤养分空间变异影响不同,绿篱+有机肥措施增大了全磷、速效磷的空间变异,绿篱+无机肥措施增大了速效钾的空间变异。
土壤性質空間變異是一種普遍現象,但等高綠籬——坡地農業複閤繫統中土壤性質空間變異的研究較少。本文以設置在三峽庫區王傢橋小流域的香根草(Vetiveria zizanioides)綠籬試驗小區為研究對象,從徑流小區呎度探討瞭不同措施對土壤性質空間變異的影響。結果錶明,綠籬種植可降低O.2~0.002mm粒級糰聚體的空間變異,綠籬+有機肥與綠籬+無機肥措施可降低〈0.002mm粒級糰聚體的空間變異,綠籬+覆蓋措施能降低0.2—0.002mm粒級糰聚體的空間變異。綠籬種植可降低土壤有機碳、全氮、全燐、速效燐養分空間變異。施肥措施對繫統內土壤養分空間變異影響不同,綠籬+有機肥措施增大瞭全燐、速效燐的空間變異,綠籬+無機肥措施增大瞭速效鉀的空間變異。
토양성질공간변이시일충보편현상,단등고록리——파지농업복합계통중토양성질공간변이적연구교소。본문이설치재삼협고구왕가교소류역적향근초(Vetiveria zizanioides)록리시험소구위연구대상,종경류소구척도탐토료불동조시대토양성질공간변이적영향。결과표명,록리충식가강저O.2~0.002mm립급단취체적공간변이,록리+유궤비여록리+무궤비조시가강저〈0.002mm립급단취체적공간변이,록리+복개조시능강저0.2—0.002mm립급단취체적공간변이。록리충식가강저토양유궤탄、전담、전린、속효린양분공간변이。시비조시대계통내토양양분공간변이영향불동,록리+유궤비조시증대료전린、속효린적공간변이,록리+무궤비조시증대료속효갑적공간변이。
Spatial variation of soil properties is a common phenomenon. However, rare research has been conducted for the contour hedgerow intercropping system. In this study, we investigate the effects of different agricultural measures on the spatial variation of soil properties at runoff plot scale planted with Vetiveria zizanioides hedgerow at the Wangjiaqiao Watershed in the Three Gorges Region. The results show that planting hedgerow reduces the spatial variation of 0.2 - 0. 002 mm fraction aggregates. Application of hedgerow + organic fertilizer or hedgerow + chemical fertilizer reduces the spatial variation of 〈 0. 002mm fraction aggregates. Hedgerow + mulch reduces spatial variation of 0.2 - 0. 002 mm fraction aggregates. Planting hedgerow reduces the spatial variation of soil nutrients including organic carbon, total nitrogen, total phosphorus and available phosphorus. Fertilization measures, however, have different effects on the spatial variation of soil nutrients. Hedgerow + organic fertilizer increase the spatial variation of total phosphorus and available phosphorus. Hedgerow + chemical fertilizer increases the spatial variation of available potassium.