摘要
采用盆栽试验研究了水稻水作与旱作条件下土壤和植物的磷素有效性。结果表明 :施磷使两种栽培条件下的水稻吸磷量明显提高 ,水作水稻比旱作水稻从土壤中吸收的磷更多 ;施磷后水作和旱作土壤各组分磷都有所增加 ,其中以树脂P、NaHCO3 P和NaOHP较为突出。在水作条件下 ,从分蘖到成熟期水稻吸磷的增加量与树脂P、NaHCO3 P、细胞P、NaOHP的减少量有很好的相关性 ;而在旱作条件下 ,水稻吸磷的增加量仅与树脂P、NaHCO3 P的减少量相关性较好。树脂P、NaHCO3 P、细胞P、NaOHP。
Pot experiments were conducted to study soil availability of phosphorus(P)to rice plants cultivated under waterlogged and aerobic conditions.The results showed that:(1)P uptake by rice increased with application of P fertilizer under both cultivation conditions but the amount of P absorbed by rice cultivated on waterlogged soil was larger than that on aerobic soil;(2)Contents of all forms of phosphorus in the soils under both conditions increased in the case of P application,especially for the Resin P,NaHCO 3 P and NaOH P;(3)The increased amount of P uptake by rice plant from tillering to harvesting was closely related to the decreased amount of soil resin P,NaHCO 3 P,microbial biomass P and NaOH P in terms of waterlogged condition,while the P uptake by rice plant in aerobic condition was only related to resin P and NaHCO 3 P.Resin P,NaHCO 3 P,Microbial biomass P,NaOH P and Sonicate/NaOH P were biologically available for rice crop to different extent.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
2002年第4期53-56,共4页
Journal of Nanjing Agricultural University
基金
国家自然科学基金资助项目 (3 0 0 70 44 6)
关键词
水稻
水作
旱作条件
土壤
植物磷素
有效性
rice cultivation
waterlogged condition
aerobic condition
soil
plant
phosphorus availability
