聚丙烯酸盐类改良剂对土壤理化性状及烤烟根系生长的影响

发布时间：2018-03-09 19:10

本文选题：土壤改良剂　切入点：烤烟　出处：《中国烟草科学》2017年02期 　论文类型：期刊论文

【摘要】：为探讨聚丙烯酸盐类土壤改良剂单施和复配作用下的土壤理化性状及烤烟根系生长变化,采用大田试验研究了土壤改良剂对植烟土壤肥力、含水量、容重及烤烟根系指标的影响。结果表明:(1)聚丙烯酰胺+腐殖酸钾处理的土壤有机质、碱解氮、速效磷含量最高,聚丙烯酸钾+腐殖酸钾处理的土壤速效钾含量最高;(2)在提高土壤含水率以及降低土壤容重上,聚丙烯酰胺+腐殖酸钾处理效果最好,各土层土壤含水率的提高幅度及容重的降低幅度均表现为20~40 cm10~20 cm0~10 cm;(3)聚丙烯酰胺+腐殖酸钾处理的根长、根体积、根干重和根冠比显著高于其他处理,施用土壤改良剂也明显提高了20~40 cm土层根系生物量的比重。总的来看,施用土壤改良剂能改善土壤理化性状,促进根系生长发育,以聚丙烯酰胺+腐殖酸钾处理效果最佳。
[Abstract]:In order to study the physical and chemical properties of soil and the change of root growth of flue-cured tobacco under the action of single and mixed polyacrylate soil improver, the field experiment was conducted to study the effect of soil modifier on soil fertility and water content of tobacco planting. Effect of bulk density and root system index of flue-cured tobacco. The results showed that the content of organic matter, alkali-hydrolyzed nitrogen and rapidly available phosphorus in soil treated with potassium polyacrylamide humic acid was the highest. The content of available potassium in the soil treated with potassium polyacrylate humic acid was the highest. (2) the effect of potassium polyacrylamide humic acid treatment was the best in increasing soil moisture content and reducing soil bulk density. The increasing range of soil moisture content and the decreasing range of bulk density of each soil layer were 20 ~ 40 cm10~20 cm0~10 / cm ~ (3)) the root length, root volume, root dry weight and root / shoot ratio of potassium polyacrylamide humic acid treatment were significantly higher than those of other treatments. The application of soil modifier also significantly increased the proportion of root biomass in 20 ~ 40 cm soil layer. In general, the application of soil modifier could improve the physical and chemical properties of soil and promote root growth and development, and the treatment with potassium polyacrylamide humic acid had the best effect.
【作者单位】：河南农业大学烟草学院;
【基金】：河南省洛阳市烟草公司项目“洛阳‘崤山’牌烟叶风格特色解读与品牌提升工程”(LYKJ2014001)
【分类号】：S572;S156.2

【相似文献】