摘要
本文自辽宁省西部朝阳地区旱地土壤及设施栽培土壤采集耕层土壤样品,分析了褐土区旱地改为设施栽培后土壤pH、电导率、有机质、速效养分及交换性养分含量的变化。研究结果表明:1)朝阳褐土地区旱地变为设施种植蔬菜后,耕层土壤有机质、碱解氮、速效磷、速效钾含量、土壤电导率均显著增加,土壤pH值则由偏碱性显著下降至中性及微酸性;2)设施土壤交换性盐基总量显著增加,较旱地土壤提高了11.37%,其中设施土壤的交换性Mg^(2+)、K^+含量分别是旱地土壤的1.89倍和2.77倍,均显著增加;土壤交换性Ca^(2+)的含量无显著变化。3)设施土壤中交换性Mg^(2+)和K^+占交换性盐基总量的比例显著高于邻近的旱地土壤,交换性Ca^(2+)的比例则显著低于旱地;设施土壤Ca/K、Mg/K、Ca/Mg比值较旱地土壤均显著下降,其中设施土壤的平均Mg/K比值已低于2,土壤缺Mg现象应得到重视。在设施土壤养分管理过程中,应充分考虑交换性养分的数量及其比例关系。
Soil samples were collected from upland fields and greenhouse fields in Chaoyang, Liaoning Province, China. The changes of soil pH, conductivity, organic matter, available nutrients and the exchangeable base ions were analyzed after the upland fields were switched into greenhouse cultivation field. The contents of organic matter, available nitrogen (N), phosphorus (P) and potassium (K), electric conductivity (EC) in the surface soil were significantly increased and the value of soil pH was decreased significantly after the upland field was changed into greenhouse cultivation field. The soil pH ranged from alkalinity to neutrality and slight acidity. The total contents of exchangeable base ions (TEB) were significantly increased by 11.37% and the contents of exchangeable K + and Mg 2+ increased significantly by 1.89 and 2.77 times, respectively in the greenhouse soils compared with upland fields, whereas the increase in exchangeable Ca 2+ was not obvious. The proportions of exchangeable K + and Mg 2+ in TEB of the greenhouse fields were significantly higher than those of the upland fields, but the proportion of exchangeable Ca 2+ decreased significantly. The ratios of soil Ca / K, Mg / K, Ca / Mg were significantly decreased as compared with the upland fields and the average ratios of soil Mg / K fell below 2. The lack of Mg in soil should be taken seriously. The content and proportion of exchangeable nutrient should be considered in soil nutrient management of the greenhouse.
作者
范庆锋
陈天琦
虞娜
邹洪涛
张玉玲
FAN Qing-feng;CHEN Tian-qi;YU Na;ZOU Hong-tao;ZHANG Yu-ling(College of Land and Environmental Science,Shenyang Agricultural University,Nationl Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources.Shenyang 110866,China)
出处
《土壤通报》
CAS
北大核心
2018年第6期1423-1427,共5页
Chinese Journal of Soil Science
基金
国家重点研发计划支持项目(2018YFD0201300)
国家自然科学基金项目(41501306)
国家科技支撑计划课题(2015BAD23B01)资助
关键词
褐土
设施土壤
土壤养分
交换性盐基比例
Cinnamon soil
Greenhouse soil
Soil nutrients
Ratios of exchangeable base
