用土壤全氮与有机质建立油菜测土施氮指标体系的研究  

Research on nitrogen fertilizer recommendation indicator system establishment using soil tested total N and organic matter in rapeseed

作　　者：姜丽娜[1] 王强[1] 单英杰 符建荣[1] 马军伟[1] 叶静[1] 俞巧钢[1] 

机构地区：[1]浙江省农业科学院环境资源与土壤肥料研究所,杭州310021 [2]浙江省土肥站,杭州310020

出　　处：《植物营养与肥料学报》2012年第1期203-209,共7页Journal of Plant Nutrition and Fertilizers

基　　金：国家科技支撑项目课题(2008BADA4B08);国际植物营养研究所(IPNI)项目资助

摘　　要：本文在汇总近年来浙江省多点油菜氮肥效应试验、氮肥用量试验的基础上,比较氮肥效应、经济施氮量与土壤全氮、土壤有机质之间的回归函数模型,筛选建立油菜测土施氮指标体系的可靠测定指标。回归分析结果表明,土壤有机质、土壤全氮与缺氮处理相对产量的回归指数函数分别为Y=20.157e0.4413X(R2=0.5887**)和Y=10.882e0.045X(R2=0.3365**),土壤有机质、土壤全氮与油菜经济施氮量的对数函数分别为Y=-314.25LnX+1392.9(R2=0.6896**)和Y=-191.77LnX+427.81(R2=0.314**)。比较曲线函数的回归决定系数R2,土壤有机质与缺氮处理相对产量、经济施氮量的回归决定系数大于预测精度要求,可成为油菜种植田土壤供氮能力丰缺和推荐经济施氮量的指标,而全氮由于回归决定系数R2低于0.35,不适合成为土壤供氮能力和推荐经济施氮量的指标。通过回归方程划定不同土壤供氮水平下土壤有机质含量范围和相对应的推荐经济施氮量,构建浙江省油菜测土施氮指标体系。This article attempted to establish rapeseed indicator system of soil testing and nitrogen （N） fertilizer rec- ommendation using the regression function mode through analyzing the nitrogen fertilizer effect, economy N fertilizer applied rate, soil total nitrogen and soil organic matter （OM） based on large data of rapeseed nitrogen fertilizer effect and rate experiments in recent years in Zhejiang Province. The mathematic model showed that, soil OM, soil total N and the rapeseed relative yield of N deficiency treatment existed a regression index function with Y = 20. 157e0.4413x（R2 =0. 5887 ＊ ＊ ）and Y = 10. 882e0.045X（R2 =0. 3365 ＊ ＊ ）, while soil OM, soil total N and the eco- nomic rate of nitrogen fertilizer application also existed a regression index function with Y = - 314.25LnX ＋ 1392.9（R2 =0. 6896＊ ＊ ）and Y = - 191.77LnX ＋427.81 （R2 =0. 314＊ ＊ ）. The regression determination coeffi- cient R2 among soil OM, the rapeseed relative yield of N deficiency treatment and the economic rate of nitrogen fer- tilizer application were above the forecast precision. Soil OM may be an index for soil nitrogen supply ability fore- east and economic nitrogen fertilizer recommendation in field rapeseed production. However, soil total nitrogen was not a suitable index for soil nitrogen supply ability forecast and economic nitrogen fertilizer recommendation because regression determination R2 was less than 0.35. The soil testing and N fertilizer recommendation indicator system was constructed for rapeseed planting area in Zhejiang Province based on regress equations delimited content range of soil OM and recommendation N fertilizer rate under different N supply level.

关 键 词：油菜 土壤全氮 土壤有机质 测土施氮 指标体系 

分 类 号：S565.4[农业科学—作物学]