四川省盐源县植烟土壤氮磷钾空间变异特征及影响因素

发布时间：2018-06-14 21:14

本文选题：植烟土壤 + 碱解氮　；参考：《土壤》2016年05期

【摘要】：利用地统计学和回归分析方法分析四川省盐源县植烟土壤碱解氮、有效磷、速效钾含量空间变异特征以及不同因素对其空间变异的影响,以期为盐源烤烟种植区划、科学施肥和产质量提升提供科学依据。结果表明:1碱解氮、有效磷和速效钾的均值分别为102.84、10.18、148.10 mg/kg,整体处于中等水平,变异系数分别为38.66%、90.08%、60.65%,达到中等变异程度,空间分布不均;2碱解氮、有效磷空间分布符合指数模型,具有中等空间自相关,速效钾符合高斯模型,具有明显空间自相关,空间变异受结构性因素和随机性因素共同影响;3盐源植烟土壤碱解氮、有效磷和速效钾空间变异的主控因素有所不同,碱解氮为坡度和前茬作物,有效磷为土壤类型和前茬作物,速效钾为海拔和坡度,因此植烟区规划和施肥需要综合考虑不同的影响因素。
[Abstract]:The spatial variation characteristics of alkali-hydrolyzed nitrogen, available phosphorus and available potassium in tobacco planting soil in Yanyuan County, Sichuan Province, and the effects of different factors on spatial variation were analyzed by means of geostatistics and regression analysis, so as to be the regionalization of tobacco planting in Yanyuan County, Sichuan Province. Scientific fertilization and improvement of yield and quality provide scientific basis. The results showed that the mean values of nitrogen, available phosphorus and available potassium were 102.84 ~ 10.18148.10 mg / kg, respectively, and the coefficient of variation was 38.66 and 90.08 ~ (60.65), respectively. The spatial distribution of available phosphorus was consistent with the exponential model. There were moderate spatial autocorrelation, available potassium in accordance with Gao Si model, and obvious spatial autocorrelation. Spatial variation was affected by structural and random factors, and alkali-hydrolyzed nitrogen in Yanyuan tobacco planting soil was influenced by structural factors and random factors. The main controlling factors of spatial variation of available phosphorus and available potassium were different. Alkaline hydrolyzed nitrogen was slope and previous crop, available phosphorus was soil type and previous crop, available potassium was elevation and slope. Therefore, the planning and fertilization of tobacco planting areas need to consider different factors.
【作者单位】：四川农业大学资源学院;四川中烟工业有限责任公司;四川省烟草公司凉山州公司;
【基金】：四川省教育厅科研项目(16ZB0048) 中国烟草总公司四川省公司科技项目(scyc201402006) 四川中烟工业有限责任公司重点项目(130235、130236)资助
【分类号】：S158

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