酉阳县不同质地植烟土壤肥力状况分析

Fertility Analysis of Different Texture Soil in Youyang Tobacco-growing Areas

该文对酉阳县植烟区的209个土壤样品(其中砂土土样5个,砂壤土土样37个,轻壤土土样92个,中壤土土样40个,重壤土土样17个,中粘土土样15个,重粘土土样3个)进行了分析,研究不同质地植烟土壤肥力状况。通过实验测定,分析结果表明:砂土中的土壤pH值变异较大,各种质地土壤的pH对烟草生长较为适宜;砂土和砂壤土中有机质含量偏低,其他质地土壤中有机质含量处于中等水平;氮磷钾含量在砂土和中粘土中的含量偏低;铵态氮和硝态氮比例均偏大,不利于烟草生长。通过对结果的分析提出了各质地土壤的施肥措施。

In this paper,209 soil samples （ including 5 sandy soil samples, 37 sandy loam soil samples,92 light loam soil samples, 40 middle loam soi samplesl, 17 heavy loam soil samples, 15 clay soils samples, 3 heavy clay soil samples ） in Youyang Tobacco District were analyzed to study the soil fertility status of different texture. Determined by experiment, the results showed that： the pH of sand soil varied greatly, the pH of all textures soil is more appropriatcon to the growth of tobacco; the organic matter content is lower in sand and sandy loam soil, the organic matter content is in the middle level in the other texture Soil ; NPK content is lower in the sand and the clay content than others; the ratio of ammonium and nitrate are large, and not conducive to the growth of tobacco. Through the analysis of the results, presented the fertilization treatments in the texture of the soil.