草业学报Issue(8)：218-224,7.DOI:10.11686/cyxb2014388
连续6年施磷肥对土壤磷素积累、形态转化及有效性的影响
P fertilization effects on the accumulation,transformation and availability of soil phosphorus
摘要
Abstract
The effects of phosphorus (P)fertilization on the accumulation,transformation and availability of P in soil chemistry have drawn much attention in recent years.This paper reports on a six-year fertilization ex-periment (beginning in 2008)with alfalfa grown in the south region of Beijing.The soil type in the study area is fluvo-aquic.Before the experiment was performed,soil organic matter was 11.2 g/kg,total P was 0.77 g/kg,available P was 5.66 mg/kg and soil pH was 8.3 in the topsoil (0-20 cm).The results showed that the contents of total P,available P and inorganic P in various forms decreased markedly without P fertilization and increased significantly when P fertilizer was applied.Total P and available P in soils without fertilization de-creased by 6.94% and 16.3% respectively,while in soil treated with six years fertilization they increased by 1.3%-13.0% and 164.7%-335.9% respectively.The effects of different P fertilizer treatments on Ca2-P <br> content were significant.Ca2-P content was almost depleted in the non-fertilization treatment,while levels in the fertilization treatment increased 19-36 times.P fertilization also increased the soil content of Ca8-P,Ca10-P,Al-P,Fe-P,O-P.When fertilization was stopped in 2013 it was found that no significant differences existed in soil P level,alfalfa yield and nutrient content between the treatments of continued fertilization (F2 )and ceased fertilization (F2′).The results indicate that long term P fertilization has significant and continuous effects.The accumulation of P in soil contents should also enhance future biological performance.关键词
褐潮土/磷肥/磷素形态/有效性Key words
Fluvo-aquic soil/phosphorus fertilizer/phosphorus forms/availability引用本文复制引用
李新乐,侯向阳,穆怀彬,李西良,郭丰辉..连续6年施磷肥对土壤磷素积累、形态转化及有效性的影响[J].草业学报,2015,(8):218-224,7.基金项目
“十二五”国家科技支撑计划（2012BAD12B02）资助。 （）
