高级检索

    湖南浏阳植烟土壤肥力评价及土壤养分变化

    Evaluation of Soil Fertility and Variability of Nutrient Contents of Tobaccogrowing Areas of Liuyang County of Hunan, China

    • 摘要: 为提高湖南浏阳烟区烤烟施肥针对性,于2000 年和2015 年,分别对烟区188 个烟田土壤样点进行了取样测定,并采用模糊函数方法对土壤肥力适宜性进行了综合评价,研究了15 年来土壤养分及肥力变化。结果表明:(1)经过15 年的生产利用,土壤pH 提高了0.32 个单位,有机质和碱解氮分别下降了9.26%和7.26%,土壤有效磷和速效钾分别增加118.84%和63.42%,水溶性氯和有效硫分别下降了55.87%和24.33%,其余微量元素(铜、钼除外)均出现不同幅度增加,全市植烟土壤综合肥力指标由0.536 增至0.650,增幅为21.27%。(2)当前浏阳植烟土壤pH 和有机质含量偏低,有效磷、有效铜和有效铁含量偏高,有效钼和水溶性氯较缺,其余养分较适宜,综合肥力处于较高(75.76%)和中等(21.21%)等级,各基地单元间无显著差异。因此烟草施肥应稳氮控磷增钾,增施有机肥及钼、氯等中微量元素肥料。

       

      Abstract: The soil nutrient contents of 188 tobacco-planting fields in Liuyang of Hunan were surveyed in 2000 and 2015 in order to instruct fertilization. The soil fertility suitability in 2015 was comprehensively evaluated, and the variations of soil nutrient contents from 2000 to 2015 were studied. The results showed that: 1) From 2000 to 2015, soil pH increased by 0.32 unit. Available P and available K increased by 118.84% and 63.42%. Organic matter and hydrolytic N reduced by 9.26% and 7.26%. Water-soluble Cl and available S decreased sharply by 55.87% and 24.33%. Except available Cu and Mo, all the other microelements increased. The average IFI of soil fertility changed from 0.536 to 0.650, increased by 21.27%. 2) Currently the soil pH and organic matter were relatively low. Available P, Cu and Fe were high while available Mo and water-soluble Cl were deficient. Other nutrient contents were appropriate. IFI of 75.76% tobacco-growing areas in Liuyang were high (75.76%) and 21.21% were medium. The difference in IFI was insignificant between different base units. The reasonable fertilization is to stabilize N, control P, and to increase K, Mo, Cl and organic manure fertilizers.

       

    /

    返回文章
    返回