摘要
为选出红壤水稻土理想的有效磷测定方法,本研究基于红壤性稻田长期定位试验,通过不同有效磷测试方法(Olsen法、Bray法、阴离子交换树脂法和铁试纸条法)测定了不同红壤性稻田土壤有效磷含量,并分析比较它们与水稻吸磷量及产量之间的关系。结果表明,4种测试方法测定有效磷结果之间存在极显著的正相关关系,相关系数均大于0.61。Olsen法与阴离子交换树脂法测定的有效磷含量较高,而铁试纸条法与Bray法的测定值较低。对红壤性水稻土,Olsen法与阴离子交换树脂法测得土壤有效磷与水稻吸磷量相关性最高,有效磷每增加1 mg/kg,水稻吸磷量约增加0.4 kg/hm^2。因此,Olsen法与阴离子交换树脂法可作为红壤性水稻土较理想的有效磷测试方法。研究发现不同地块有效磷对水稻产量的增产效率有较大差异,因此基于水稻目标产量进行磷肥管理时还需考虑土壤的实际肥力状况。
To select an ideal method for determination of available phosphorus(P)in reddish paddy soils,the available P contents in reddish paddy soils were determined.The soil samples were collected from long-term field experiments.Four commonly used determining methods(i.e.,Olsen,Bray,Resin,and Fe strip)were used to analyze the relationship between the content of available P and P uptake and yield of rice.All of the results of the determination of available P of the four methods were significantly intra-correlated,with coefficients greater than 0.61.In general,available P contents determined by Olsen and Resin methods were higher than those determined by Fe strip and Bray methods.For the reddish paddy soils,P uptake of rice had the strongest relationship with the available P determined by Olsen and Resin methods,in which an increase of 1 mg/kg of available P would result in 0.4 kg/hm^2 of P uptake increasing.Therefore,Olsen and Resin methods were ideal methods for the determination of available P in reddish paddy soils.In addition,field P management should comprehensively consider soil fertility conditions,because the responses of available P to rice yield varied among different paddy fields.
作者
郑小妹
洪欠欠
胡丹丹
魏宗强
吴建富
ZHENG Xiao-mei;HONG Qian-qian;HU Dan-dan;WEI Zong-qiang;WU Jian-fu(College of Land Resources and Environment,Jiangxi Agricultural University/Jiangxi Province Key Laboratory of Poyang Lake Basin Agricultural Resource and Ecology,Nanchang 330045,China)
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2019年第4期657-663,共7页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家重点研发计划项目(2017YFD0301601)
国家自然科学基金项目(41867019)~~
关键词
红壤性稻田
有效磷
产量
吸磷量
reddish paddy soil
available phosphorus
yield
phosphorus uptake
