中国南方双季稻氮营养指数及产量估算模型研究  

Study on estimation model for nitrogen nutrition index and yield on double cropping rice in southern China

作　　者：贺志远[1] 朱艳[1] 李艳大[2] 刘小军[1] 曹强[1] 曹卫星[1] 汤亮[1] 

机构地区：[1]南京农业大学国家信息农业工程技术中心/江苏省信息农业高技术研究重点实验室/江苏省现代作物生产协同创新中心,江苏南京210095 [2]江西省农业科学院农业工程研究所,江西南昌330200

出　　处：《南京农业大学学报》2017年第1期11-19,共9页Journal of Nanjing Agricultural University

基　　金：国家重点研发计划项目(2016YFD0300110);国家公益性行业(农业)科研专项(201303109);江苏省高校优势学科资助项目(PAPD);江苏省自然科学基金项目(BK20151435);国家自然科学基金项目(31571566)

摘　　要：[目的]构建归一化差值植被指数(normalized difference vegetation index,NDVI)和氮营养指数(nitrogen nutrition index,NNI)关系模型,并构建不同时期积分归一化植被指数(integrated NDVI,NDVI_(int))与相对产量(relative yield,RY)之间的算法,以期通过NDVI无损监测氮素营养的亏缺来预测水稻产量。[方法]通过2年(2014—2015年)不同品种和不同施氮处理的早、晚稻田间小区试验,获取水稻地上部干物质量和氮含量,冠层植被指数(NDVI)及产量等,基于临界氮浓度稀释曲线计算不同时期NNI,分析NDVI与NNI、积分NDVI与RY之间的定量关系。[结果]早、晚稻各个时期的NDVI与NNI之间能够很好地以指数函数(NNI=a×e^b×NDVI)拟合,拔节期的估算效果最好,模型为:早稻的NNI=0.431e^(1.372NDVI);晚稻的NNI=0.075e^(3.471NDVI),其估算NNI与实测NNI的R^2、准确度和RRMSE分别为0.92、0.868和7.092%(早稻)及0.84、0.914和13.736%(晚稻)。早、晚稻各时期的NDVI_(int)与RY之间存在显著线性关系,除晚稻分蘖期外都具有较好的预测准确性,经检验,早稻各时期模型预测产量与实测产量的R^2、准确度和RRMSE分别为0.91~0.93、0.812~0.899和7.216%~9.978%,晚稻的分别为0.79~0.89、0.721~0.980和5.134%~6.736%,其中全生育期的模型效果最好,但是在0.05显著水平下早稻与晚稻之间具有较大差异。[结论]构建的基于NDVI的氮营养指数估算模型及基于积分NDVI的相对产量估算模型分别能够准确地反映作物氮素营养状况和预测产量,可为中国南方双季稻区追肥管理和产量预测提供技术支持和理论依据。[ Objectives ] In order to achieve nondestructive diagnosis of plant nitrogen status, this study aims to estimate and validate the relationships between normalized difference vegetation index（NDVI） and nitrogen nutrition index（NNI） at the stage of tillering, jointing and booting and the period from tillering to booting, and then develop an algorithm between integrated normalized difference vegetation index（NDVlin, ）and relative yield（ RY） at different periods. [ Methods] Two years experiments involving different nitrogen rates（0-300 kg· hm-2 for early rice and 0-360 kg· hm-2 for late flee）were conducted in 6 indiea varieties, ＇ Zhongjiazaol7＇ （ ZJZ- 17）, ＇ Tanliangyou83＇ （ TLY-83）, ＇ Tianyouhuazhan ＇ （ TYHZ）, ＇ Yueyou-9113＇ （ YY-9113 ）, ＇ Xiangyou- 186＇ （ XY- 186） and ＇ Wufengyou-788＇ （WFY-788） for double cropping flee in south China during 2014 and 2015 to obtain the data of shoot dry weight, shoot nitrogen eontent,NDVI and yield. NNI at different periods was calculated based on the critical nitrogen concentration dilution curve, the relationship between NDVI and NNI and the relationship between integrated NDVI and relative yield at different periods were developed by using the experiment data in 2014 and validated by experiment data in 2015. Analysis of eovariance was used to test the significant difference between the present models. [ Results] The values of NDVI ranged from 0.18 to 0.74 and 0.31 to 0.8 for early and late rice respectively, and NDVI increased with the increase of nitrogen rates. The NNI during growth period increased gradually to the maximum until 31 days after transplanting and then declined. It was similar to NDVI that was significantly affected by N rate for both early and late flee. Higher N application led to a higher NNI value. However,there was significant difference on NDVI between early and late rice that early rice had a lower NDVI value than late rice at the same growth stage. The NDVI during jointing was most rob

关 键 词：双季稻 NDVI 氮营养指数 模型 产量 

分 类 号：S511[农业科学—作物学] S311