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湖南省邵阳烟区土壤有效锌含量时空特征及其影响因素
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摘要
为了解邵阳烟区植烟土壤有效锌含量分布状况,测试了邵阳烟区1790个土壤样品的有效锌含量,采用传统统计学和地统计学方法分析了邵阳烟区植烟土壤有效锌含量丰缺状况、空间分布、演变趋势及p H值、有机质组的影响。结果表明:①邵阳烟区植烟土壤有效锌含量总体上丰富,平均值为3.15 mg/kg,变异系数为73.18%,处于适宜范围内的样本占92.57%。②邵阳县和新宁县植烟土壤有效锌含量极显著高于隆回县。③植烟土壤有效锌含量呈斑块状分布,总体上具有从中部分别向西南部和北部递减的分布趋势。④植烟土壤有效锌含量年度变化呈上升趋势。⑤植烟土壤有效锌含量有随pH值升高而降低的趋势。⑥植烟土壤有效锌含量有随有机质提高而增加的趋势。
In order to understand distribution of available zinc content in tobacco-growing soil in Shaoyang, adequacy status of zinc, evolution tendency, p H value, and organic matters in 1790 soil samples were analyzed by methods of traditional statistics and geo-statistics. Results were as follows:(1) Available zinc content in tobacco-grown soil was abundant for tobacco cultivation,averaging 3.15mg/kg and variation coefficient was 73.18%. About 92.57% of the soil samples had available zinc content for suitable tobacco cultivation.(2)Available zinc content in tobacco-growing soil in Shaoyang county and Xinning county was significantly higher than Longhui county.(3) Kriging interpolation map indicated that available zinc was patchily distributed and showed declining trend from the middle region to the northern and south-western regions.(4) Compared with the 2002 soil survey, available zinc content showed an upward tendency with the passage of time.(5) There is extremely significant differences among content of available zinc in different p H groups, and content of available zinc was decreasing with the rise of p H in tobacco growing soil in Shaoyang.(6) There is extremely significant differences among content of available zinc in different organic matter groups, and content of available zinc was increasing with the rise of organic matter in tobacco growing soil in Shaoyang.
引文
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