不同施肥处理对马尾松幼苗及根际环境的影响  

Effects of different fertilizer treatment on Pinus massoniana seedlings and root environment

作　　者：周玮[1,2,3] 周运超[3] 

机构地区：[1]贵州民族大学化学与环境科学学院,贵州贵阳550025 [2]贵州省林业科学研究院,贵州贵阳550005 [3]贵州大学林学院,贵州贵阳550025

出　　处：《中南林业科技大学学报》2012年第7期19-23,共5页Journal of Central South University of Forestry & Technology

基　　金：国家"十一五"科技支撑课题(2006BAD24B0301);国家科技成果转比课题(2007GB2F200286);贵州省特助人才课题(TZJF-2007年20号);贵州省农业攻关课题(黔科合NY字20093066);贵州省科学技术基金(黔科合J字[2011]2133号)

摘　　要：应用原位显色法研究了不同施肥处理下马尾松幼苗根际pH值及Eh的变化。结果表明:施磷肥马尾松幼苗苗木质量较好,苗高、地径分别达到8.08 cm及1.38 mm,根系发达,侧须根较多,根表面积大,且施磷肥根际土壤pH值变化较大,变化范围宽,下降快,10 h时从6.0下降到5.2,关于MnO2的Eh变化不明显;而施氮肥则相反,苗木质量较差,侧须根不发达,主根长,为7.47 cm,根表面积小,pH值变化范围窄,变化缓慢,高锰酸钾显色法研究结果表明施氮肥苗木根际范围内褪色,为还原态。The changes of rhizosphere pH and Eh of Pinus massoniana seedlings were investigated with different treatments and by means of in situ chromogenic method. The results show that the quality of the seedlings treated by phosphate fertilizer was better than other fertilizers, the values of highness and diameter were 8.08 cm and 1.38 mm, the root-system grew rapidly, there were a lots of side fibre, and the root surface area was big. And the phosphate fertilizer made a remarkably changing of rhizosphere pH value, from 6.0 to 5.2 after 10 hours. The diversification of Eh about MnO2 was not clearly; while Pinus massoniana seedlings treated by nitrogen fertilizer reversed the front.

关 键 词：马尾松幼苗 根系 根际环境 施肥 影响 

分 类 号：S791.248[农业科学—林木遗传育种] S723.7[农业科学—林学]