CAJ | 학술논문

应用地统计学对云南省呈贡县蔬菜生产基地2个典型区域(湖滨区和平坝区)3种微量元素(Pb、Cu和Zn)含量和土壤理化参数(CEC、<0.01mm粘粒和有机质含量)进行了空间结构分析.结果表明:(1)Pb、Cu和zn含量在湖滨区低于平坝区,湖滨区Pb含量的变异系数较大,达到88.7%;(2)Pb、Cu和Zn含量在不同方向上呈带状各向异性,方向都为WS-NE和SE-NW;(3)Pb、Cu和Zn含量表现出强烈的空间变异,空间相关度介于25%和75%之间.在湖滨区Pb的变异强度高,Cu和Zn在平坝区的变异强度大于湖滨区;(4)CEC在湖滨区受到随机因素引起的变异强度大于平坝区,而粘粒含量和有机质含量的空间相关度均介于25%和75%之间.Pb、Cu和zn含量与CEC之间呈显著的负相关性;(5)5个相邻的温室大棚湖滨区Pb含量高度变异,Cu和Zn的变异系数小.平坝区各指标的变异系数接近.呈贡县蔬菜生产基地表层土壤Pb、Cu和Zn含量在小于1km~2的尺度上表现出明显的空间变异性,空间变异与土壤结构、灌溉、耕作活动、管理水平、施肥水平、大棚蔬菜生产年限、地下水位、农田道路网络和城市排污沟渠的分布等有关.
응용지통계학대운남성정공현소채생산기지2개전형구역(호빈구화평패구)3충미량원소(Pb、Cu화Zn)함량화토양이화삼수(CEC、<0.01mm점립화유궤질함량)진행료공간결구분석.결과표명:(1)Pb、Cu화zn함량재호빈구저우평패구,호빈구Pb함량적변이계수교대,체도88.7%;(2)Pb、Cu화Zn함량재불동방향상정대상각향이성,방향도위WS-NE화SE-NW;(3)Pb、Cu화Zn함량표현출강렬적공간변이,공간상관도개우25%화75%지간.재호빈구Pb적변이강도고,Cu화Zn재평패구적변이강도대우호빈구;(4)CEC재호빈구수도수궤인소인기적변이강도대우평패구,이점립함량화유궤질함량적공간상관도균개우25%화75%지간.Pb、Cu화zn함량여CEC지간정현저적부상관성;(5)5개상린적온실대붕호빈구Pb함량고도변이,Cu화Zn적변이계수소.평패구각지표적변이계수접근.정공현소채생산기지표층토양Pb、Cu화Zn함량재소우1km~2적척도상표현출명현적공간변이성,공간변이여토양결구、관개、경작활동、관리수평、시비수평、대붕소채생산년한、지하수위、농전도로망락화성시배오구거적분포등유관.
The spatial distribution of 3 trace dements (Pb, Cu and Zn) in lacustrine and transition units of periurban market garden in Cheng-gong County, Yunnan Province were studied with geostatistical analysis. The results showed that: (1)contents of Pb. Cu and Zn in lacustrine unit were lower than in transition unit. The variation coefficient(CV) of Pb was 88.7% in lacustrine unit (2)Pb, Cu and Zn showed anisotropy with direction WS-NE and SE-NW. (3)the spatial variations of Pb. Cu and Zn were significant. The nugget (C_0) of Pb in lacustrine unit was higher than in transition unit, on the contrary for Cu and Zn. Values of nugget/sill of Pb, Cu and Zn ranged from 25% to 75%.(4)the nugget of CEC in lacustrine unit was higher than in transition unit. CEC was mainly affected by random factors. Values of nugget/sill of physical clay (<0.01 mm) and organic matter(OM) contents ranged from 25% to 75%. Negative reWionships between CEC and Pb, Cu and Zn were ob-served.(5)Comparing with 5 greenhouses close together, CV of Pb>100% meant strongly spatial variation in lacustrine unit. CV of Cu and Zn were close, meant similar agricultural practice. In general,spatial variation of Pb, Cu and Zn with 100 m×100 m grid size was significant in two areas(1 km~2 and 0.49 km~2). The spatial distribution of Pb, Cu and Zn was affected by soil texture, irrigation, fertilizers, greenhouse plant-ing years, road and sewage channel net underground water level and other agricultural management practice.