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当前位置: 首页 > 文章 > 几种退耕还林模式土壤溶液养分动态研究 四川林业科技 2007,28 (3) 72-76
Position: Home > Articles > Dynamic Studies of Soil Nutrients under Several Defarming-and-reafforestation Patterns Journal of Sichuan Forestry Science and Technology 2007,28 (3) 72-76

几种退耕还林模式土壤溶液养分动态研究

作  者：
梁剑;张健;王辉东
单  位：
西昌学院园艺系;四川农业大学;四川林业调查规划院
关键词：
退耕还林(草);定位研究;土壤氮素;土壤磷素;土壤钾素
摘  要：
对四川洪雅4种退耕还林模式进行了定位研究,分析了各退耕还林模式土壤溶液中有效氮、有效磷、水溶性钾的动态变化。结果表明:(1)四种模式的土壤溶液中氮素在夏季含量较高,磷素和钾素在7月至8月含量最低;(2)据各模式有效氮的变化规律,3～4月是施肥的最佳时期,并以施速效氮肥为主;(3)据各模式有效磷和速效钾的变化规律,在8月前施有效磷、钾肥效果最佳。
译  名：
Dynamic Studies of Soil Nutrients under Several Defarming-and-reafforestation Patterns
作  者：
LIANG Jian~1 ZHANG Jian~2 WANG Hui-dong~3 (1.Horticulture Department of Xichang College,Xichang Sichuan 615013; 2.Sichuan Agricultural University,Ya'an 625014,Sichuan; 3.Sichuan Forest Inventory and Plan Institute,Chengdu 610081)
关键词：
Defanning-and-reafforestation(Planting grass);;Site investigation;;Soil nitrogen;;Soil phosphate;;Soil potassium
摘  要：
To understand dynamic changes of soil nitrogen,phosphate and potassium under different de- farming-and-reafforestation patterns,four patterns were chosen as sampling spots in Hongya,Sichuan dur- ing two-year time;The results showed that(1)the mean value of soil nitrogen under different defarming- and-reafforestation patterns was the higher in summer,and the mean values of soil phosphate and potassi- um of all patterns were the lowest in April and August;(2)Viewed from the changable regularity of availa- ble nitrogen,a suitable season for fertilizing nitrogen was between March and April;(3)Viewed from the changable regularity of soil available phosphate and dissolved potassium,a suitable season for fertilizing phosphate and potassium was before August.

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