贵州农业科学2025，Vol.53Issue(2)：29-38,10.DOI:10.3969/j.issn.1001-3601.2025.02.004
有机无机氮配施对植烟土壤养分含量及微生物数量的影响
Effects of Organic and Inorganic Nitrogen Combined Application on Nutrient Content and Microbial Quantity of Tobacco-planting Soil
摘要
Abstract
[Objective]The effects of organic and inorganic nitrogen combined application on nutrient content and microbial quantity of tobacco-planting soil were explored to provide the theoretical basis for rational application of organic nitrogen in tobacco-planting soil.[Method]Four treatments of 25% peanut bran+75% inorganic nitrogen(T1),35% peanut bran+65% inorganic nitrogen(T2),45% peanut bran+55% inorganic nitrogen(T3)and 100% inorganic nitrogen(CK)were designed in a field experiment to investigate the differences in nutrient content and microbial quantity of tobacco-planting soil among four treatments.[Result]Applying organic nitrogen could increase soil pH at vigorous growth and mature stages of tobacco.The soil pH of the organic nitrogen treatments at vigorous growth and mature stages increased by 0.12-0.42 and 0.19-0.44 compared with CK respectively.Applying organic nitrogen could decrease ammonium nitrogen and nitrate nitrogen content of tobacco-planting soil at vigorous growth stage of tobacco and inorganic nitrogen content(ammonium nitrogen+nitrate nitrogen)of tobacco-planting soil during whole growth period of tobacco and the decrease range of T2 was minimum among three organic nitrogen treatments.Applying organic nitrogen could reduce available phosphorus content at topping stage of tobacco-planting soil and available potassium content at mature stage of tobacco-planting soil but had no significant effect on total nitrogen content of tobacco-planting soil during whole field period.The soil organic nitrogen content of T2 and T3 at topping stage of tobacco was higher than CK significantly and the organic nitrogen increase range of T2 and T3 was 11.86% and 10.44% compared with CK respectively.Applying organic nitrogen could increase bacteria and actinmycetes quantity and significantly decrease soil fungus quantity of tobacco-planting soil at mature stage of tobacco.The bacteria quantity of T1,T2 and T3 was 38.03%,205.63% and 36.62% higher than CK respectively.The bacteria,fungus and actinmycetes with larger variable coefficients were relatively sensitive to organic nitrogen application.The principal component analysis indicated that the top three principal components were ammonium nitrogen,available potassium and available phosphorus.[Conclusion]The organic and inorganic nitrogen combined application can increase pH and organic matter content of tobacco-planting soil,improve activity of soil beneficial microorganism and enhance quality of tobacco-planting soil.The soil quality of T2(35% peanut bran+65% inorganic nitrogen)is the best.关键词
有机氮/无机氮/烟地/养分含量/微生物/综合评价Key words
organic nitrogen/inorganic nitrogen/tobacco-planting soil/nutrient content/microorganism/compre-hensive assessment分类
农业科技引用本文复制引用
路丹,卢昌友,范晓苏,何明雄,梁琼月,欧仲升,李世勇,沈方科..有机无机氮配施对植烟土壤养分含量及微生物数量的影响[J].贵州农业科学,2025,53(2):29-38,10.基金项目
中国烟草总公司广西壮族自治区公司科技计划项目"河池烟区K326中棵烟生产关键技术研究"(桂烟综[2023]50号) （桂烟综[2023]50号）
