推荐施肥中校验曲线模型选模方法研究  

Modeling Method of Calibration Curve in Fertilization Recommendation

作　　者：李娟[1] 章明清[1] 孔庆波[1] 姚宝全 颜明娟[1] 林琼[1] 

机构地区：[1]福建省农业科学院土壤肥料研究所,福建福州350013 [2]福建省农田建设与土壤肥料技术总站,福建福州350003

出　　处：《土壤通报》2010年第3期668-671,共4页Chinese Journal of Soil Science

基　　金：国际植物营养研究所(IPNI)合作项目(Fujian-13);国家测土配方施肥项目(2005-2008)资助

摘　　要：83个早稻氮磷钾肥效试验在土壤碱解氮、Olsen-P和速效钾试验点各剔除10.8%、6.0%和4.8%基础上,可分别建立土测值与稻谷相对产量的校验曲线。结果表明,用不同的数学模型拟合同一组试验资料,所得的土壤碱解氮或Olsen-P或速效钾在同一肥力等级的临界指标最大差异可达1.71倍。因此,综合考虑不同模型的数学特征、作物氮磷钾营养特点、土壤氮磷钾养分状况和农业环保需求等因素,土壤碱解氮最佳校验曲线模型是对数模型,Olsen-P则为指数模型,而土壤速效钾则为幂指数模型。结果表明,福建早稻土壤碱解氮含量＂高＂＂、中＂和＂低＂的指标分别是大于212mgkg-1、121~85mgkg-1和小于85mgkg-1;Olsen-P含量的指标分别是大于21mgkg-1、21~8mgkg-1和小于8mgkg-1;速效钾则分别为111mgkg-1、111~29mgkg-1和小于29mgkg-1。Based on eliminated 10.8%, 6.0% and 4.8% respectively of alkali- hydrolyzable nitrogen and Olsen- P and available potassium experimental sites from 83 NPK fertilization efficiency experiments in early rice in Fujian Province, the calibration curves between soil testing value and relative rice yield were set. Results showed that, by using different models to simulate the same group of experimental data, the maximum variation of critical index in same fertility grade of alkali- hydrolyzable nitrogen, Olsen- P and available potassium could reach as higher as 1.71 times. Comprehensively considering the math characteristics of different models, NPK nutrition properties for crops, NPK status in soil and the requirement in agricultural environment protection, the optimum calibration curve models for alkali- hydrolyzable nitrogen, Olsen- P and available potassium were logarithm and exponential and power exponential models respectively. The calculated result of critical index indicated that, ＂high＂ and ＂middle＂ and ＂low＂ of alkali- hydrolyzable nitrogen were 212 mg kg-1 and 212 - 85 mg kg-1 and 85mg kg-1 respectively, so were 21 mg kg-1, 21 - 8 mg kg-1 and 8 mg kg-1 in Olsen- P and 111 mg kg-1 and 111 - 29 mg kg-1 and 29 mg kg-1 in available potassium respectively in early rice of Fujian Province.

关 键 词：碱解氮 OLSEN-P 速效钾 校验曲线 选模 

分 类 号：S147.3[农业科学—肥料学]