四川林业科技

2007, (03) 64-68

[打印本页] [关闭]
本期目录(Current Issue) | 过刊浏览(Archive) | 高级检索(Advanced Search)

几种退耕还林模式土壤溶液养分动态研究
Dynamic Studies of Soil Nutrients under Several Defarming-and-reafforestation Patterns

梁剑,张健,王辉东
LIANG Jian~1 ZHANG Jian~2 WANG Hui-dong~3 (1.Horticulture Department of Xichang College,Xichang Sichuan 615013, 2.Sichuan Agricultural University

摘要(Abstract):

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。
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.

关键词(KeyWords): 退耕还林(草);定位研究;土壤氮素;土壤磷素;土壤钾素
Defanning-and-reafforestation(Planting grass);Site investigation;Soil nitrogen;Soil phosphate;Soil potassium

Abstract:

Keywords:

基金项目(Foundation): 国家科技部“十五”重点课题(2001BA606A-06-1);; 四川省重点学科建设项目资助

作者(Author): 梁剑,张健,王辉东
LIANG Jian~1 ZHANG Jian~2 WANG Hui-dong~3 (1.Horticulture Department of Xichang College,Xichang Sichuan 615013, 2.Sichuan Agricultural University

DOI: 10.16779/j.cnki.1003-5508.2007.03.012

扩展功能
本文信息
服务与反馈
本文关键词相关文章
本文作者相关文章
中国知网
分享