植物营养与肥料学报2017，Vol.23Issue(5)：1175-1183,9.DOI:10.11674/zwyf.16444
长期不同施肥下南方黄泥田有效磷对磷盈亏的响应特征
Response characteristics of Olsen-P to P balance in yellow paddy fields of southern China
摘要
Abstract
[Objectives]In order to provide theory for phosphate (P) fertilizer application in the yellow paddy, a study was conducted to research the relationship between P accumulation and its efficiency.[Methods]The variation and accumulate of P in paddy fields were studied in a 33 years' long-term experiment. Four fertilizer treatments were setup: no fertilizer (CK), chemical fertilizer (NPK), chemical fertilizer plus cattle manure (NPKM), and chemical fertilizer plus straw (NPKS) and available P-P response coefficient was calculated.[Results]The contents of soil available and total P in the CK treatment decreased with the treatment years in both the double-rice and the single-rice systems, and those in the other three treatments increased with the fertilizer treatment years under double-rice system (1983-2004) and decreased in single rice system (2005-2015). Until 2015, the contents of soil available P in the NPK and NPKS treatments were 9.7 mg/kg and 8.7 mg/kg, which were significantly lower than that of initial soil sample in 1983, and decreased by 8.3 mg/kg and 9.3 mg/kg, respectively. The available P content in the NPKM treatment was 18.0 mg/kg in 2005, which was in line with initial soil sample. The phosphorous activity coefficients of the CK, NPK, NPKM and NPKS treatments were 2.9%, 3.5%, 4.7% and 4.1% in turn, those in the NPKM and NPKS treatments were significantly higher than that in the NPK treatment. There was a linear relationship between the balance of P and soil available P contents in all the treatments except that in NPKS under double-rice system. Under double-rice system, annual soil P surplus of 100 kg/hm2 would lead to the increment of soil available P contents of 4.5 and 11.2 mg/kg in the NPK and NPKM treatments, and under single-rice system, annual soil P defect of 100 kg/hm2 would lead to the decrement of available P content by 14.6, 23.9 and 25.9 mg/kg in the NPK, NPKM and NKPS treatments, respectively. The soil could keep in balance when the amount of P fertilizers was 26.2 kg/hm2.[Conclusions]Available P content is closely related to the balance of soil P. The available P response coefficient of the NPK combined with manure or straw fertilization is higher than that of NPK fertilization under the equivalent phosphorus balance. Acceleration response of available P is higher under phosphorus-deficient conditions than phosphorus-sufficient conditions.关键词
长期施肥/黄泥田/有效磷/磷盈亏/磷素活化系数Key words
long-term fertilization/yellow paddy field/available phosphorous/P balance/PAC引用本文复制引用
林诚,王飞,李清华,何春梅,张辉..长期不同施肥下南方黄泥田有效磷对磷盈亏的响应特征[J].植物营养与肥料学报,2017,23(5):1175-1183,9.基金项目
福建省属公益类科研院所基本科研专项(2015R1022-5,2016R1021-2) （2015R1022-5,2016R1021-2）
公益性行业(农业)科研专项(201203030)资助. （农业）
