长期定位施肥对无石灰性潮土磷素状况的影响  

Effects of Long-Term Located Fertilization on Status of Phosphorus in Non-Calcareous Fluro-Aquic Soil

作　　者：刘树堂[1] 韩晓日[2] 迟睿[1] 隋方功[1] 姚源喜[1] 

机构地区：[1]莱阳农学院农学系,山东莱阳265200 [2]沈阳农业大学土地与环境学院,辽宁沈阳110161

出　　处：《水土保持学报》2005年第5期43-46,60,共5页Journal of Soil and Water Conservation

基　　金：国家自然科学基金资助项目(40171049)

摘　　要：基于无石灰性潮土长期定位试验,研究长期施肥对土壤磷素状况的影响的结果表明,在无石灰性潮土上长期单施有机肥、有机-无机肥配施、氮磷钾配施能提高土壤Ca-P,Fe-P,Al-P的含量,降低O-P的含量.单施氮肥能提高土壤O-P、降低Ca-P含量.单施有机肥及其配施无机化肥比单施无机化肥有机磷增加了15.60%～11.21%,无机磷减少了11.21%～15.60%.土壤有效磷与Fe-P无相关性,与土壤全磷、无机磷、有机磷呈极显著正相关,与Ca-P,Al-P呈显著正相关,与O-P呈极显著负相关.对有效磷贡献(直接通径系数)的相对重要性依次为:O-P(72.6940)＞Ca-P(69.9052)＞全磷(39.6186)＞有机磷(-32.8527)＞无机磷(-20.9515)＞Fe-P(17.2542)＞Al-P(6.4832).由逐步回归得出土壤无机磷中的O-P,Ca-P以及有机磷是土壤有效磷主要磷源.This experiment was done in the located fertilization experiment of non-calcareous fluro-aquic soil,the effects of long-term located fertilization on the status of phosphorus in soil was studied. The results indicated that ： It can improve the contents of soil Ca-P, Fe-P, Al-P, decrease the content of soil O-P that only application of organic fertilizer, combined application of organic fertilizer and inorganic fertilizer, combined application of nitrogen, phosphate and potassium fertilizer. It can increase the content of soil O-P, decrease the content of soil Ca-P, that only application of inorganic N-fertilizer, for long term in the non-calcareous soil. Soil organic phosphorous quality of the treatment of application of organic fertilizer and combined application of organic fertilizer and inorganic fertilizer were increased 15.60 %- 11.21 %, and inorganic phosphorous quality was decreased 11.21 %- 15. 60%. Soil available phosphorous was no related to Fe-P, but was positively related to soil total phosphorous, inorganic phosphorous, organic phosphorous, Ca-P and Al-P. It was negtively related to soil O-P. The order of contribution to available phosphorous （direct path coefficient ） is ： O - P （ 72.6940 ） % Ca - P （ 69.9052 ） % total phosphorous （ 39. 6186） % organic phosphorous （ - 32. 8527 ） % inorganic phosphorous （ - 20. 9515 ） % Fe - P （ 17. 2542） % Al- P （ 6.4832 ）. The main source of soil available phosphorous i- P, Ca- P and organic phospho- rous in the soil inorganic phosphorous from gradual regression.

关 键 词：长期定位施肥 无石灰性潮土 磷素状况 

分 类 号：S147.2[农业科学—肥料学] S512.11[农业科学—农业基础科学]