摘要
本试验在无石灰性潮土26年的定位试验进行过程中,在12个不同处理CK、N1、N2、M1、M2N1、M1N2、M2、M2N1、M2N2、NP2K、N2P和N2K中,于2002研究了长期定位施肥对无石灰性潮土磷素变化的影响,结果表明,长期有机肥配施无机氮肥能明显提高土壤有效磷含量,比不施肥的对照增加95.39-191.18mg/kg。氮磷钾配施、氮磷配施、氮钾配施也可提高土壤有效磷含量,比不施肥提高24.46mg/kg、24.92mg/kg和3.25mg/kg。23年定位施肥试验结果显示,不施肥和单施氮肥的土壤,其有效磷质量分数迅速下降,前3年比试验前降低50%,自第7年开始比试验前低2/3左右,降到4-5mg/kg之后处于稳定状态。土壤全磷质量分数始终保持在0.40-0.50g/kg的水平。有机磷略有增加。单施有机肥及其配施无机氮肥的土壤,其有效磷和有机磷质量分数增加显著。
This experiment was done in the 26 years fixed position experiment of non-calcareous fluro-aquic soil during the year of 2002,12 treatments were designed: CK,N1 ,N2,M1,M1N1,M1N2,M2,M2N1,M2N2, NPK,NP and NK. The effects of long-term located fertilization on potassium changes of the non-calcareous fluro-aquic soil were studied. The results indicated that: A combined application of organic fertilizer and inorganic nitrogen can also improve the content of soil available phosphorous ,it can increased 95. 39-191. 18mg/kg compared with that of non-application fertilizer. A combined application of nitrogen and phosphate and potassium fertilizer, nitrogen and phosphate fertilizer, nitrogen and potassium fertilizer can all enhance the content of soil available phosphorous, it can increased 24. 46mg/kg,24. 92mg/kg and3. 25mg/kg compared with that of non-application fertilizer. The results of 23 years' located fertilizer experiment indicated that; the soil available phosphorous quality score of non-fertilizer and only application nitrogen was decreased sharply, it can decreased 50% times 3 years later than that of s before trial, it can decreased 2/3 times in 7 years later than that of before trial, it can continue to decrease until to 4-5mg/ kg. But the soil total phosphorous quality score maintain the level of 0. 40-0. 50g/kg all along, the organic phosphorous enhanced a little. The soil available phosphorous and organic phosphorous quality score were enhanced sharply in the soil of only application organic fertilizer and combined inorganic nitrogen fertilizer.
出处
《莱阳农学院学报》
2005年第1期12-15,19,共5页
Journal of Laiyang Agricultural College
基金
国家自然科学基金资助项目(40171049)
关键词
长期定位施肥
无石灰潮土
磷素变化
土壤养分
磷肥
long-term located fertilization
non-calcareous fluro-aquic soil
phosphorous changes
